development: updated Motion dependancy

.gitmodules

-[submodule "Frameworks/Motion"]
-	path = Frameworks/Motion
-	url = https://github.com/CosmicMind/Motion.git

Motion @ 2a4e16a9

-Subproject commit 2a4e16a9647122eea2fa7dcc6fce77b3cdcab30c

Frameworks/Motion/.gitignore

+#OS X
+.DS_Store
+
+# Xcode
+build/*
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+profile
+*.moved-aside
+*.playground
+*.framework

Frameworks/Motion/.swift-version

+3.0

Frameworks/Motion/LICENSE.md

+The MIT License (MIT)
+
+Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Frameworks/Motion/README.md

+# Motion
+
+Welcome to **Motion,** a library used to create beautiful animations and transitions for views, layers, and view controllers.
+
+## Photos Sample
+
+Take a look at a sample [Photos](https://github.com/CosmicMind/Samples/tree/master/Projects/Programmatic/Photos) project to get started.
+
+![Photos](http://www.cosmicmind.com/motion/projects/photos.gif)
+
+* [Photos Sample](https://github.com/CosmicMind/Samples/tree/master/Projects/Programmatic/Photos)
+
+### Who is this for?
+
+Motion is designed for beginner to expert developers. For beginners, you will be exposed to very powerful APIs that would take time and experience to develop on your own, and experts will appreciate the time saved by using Motion.
+
+### What you will learn
+
+You will learn how to use Motion with a general introduction to fundamental concepts and easy to use code snippets. 
+
+# Transitions
+
+Motion transitions a source view to a destination view using a linking identifier property named `motionIdentifier`.
+
+| Match | Translate | Rotate | Arc | Scale |
+|:---:|:---:|:---:|:---:|:---:|
+| ![Match](http://www.cosmicmind.com/motion/transitions_identifier/match.gif) |  ![Translate](http://www.cosmicmind.com/motion/transitions_identifier/translate.gif) | ![Rotate](http://www.cosmicmind.com/motion/transitions_identifier/rotate.gif) | ![Arc](http://www.cosmicmind.com/motion/transitions_identifier/arc.gif) | ![Scale](http://www.cosmicmind.com/motion/transitions_identifier/scale.gif) |
+
+### Example Usage
+
+An example of transitioning from one view controller to another with transitions:
+
+#### View Controller 1
+
+```swift
+greyView.motionIdentifier = "foo"
+orangeView.motionIdentifier = "bar"
+```
+
+#### View Controller 2
+
+```swift
+isMotionEnabled = true
+greyView.motionIdentifier = "foo"
+orangeView.motionIdentifier = "bar"
+orangeView.transition(.translate(x: -100))
+```
+
+The above code snippet tells the source views in `view controller 1` to link to the destination views in `view controller 2` using the `motionIdentifier`. Animations may be added to views during a transition using the **transition** method. The *transition* method accepts MotionTransition structs that configure the view's animation. 
+
+* [MotionTransition API](https://cosmicmind.gitbooks.io/motion/content/motion_transition_api.html)
+* [Code Samples](https://github.com/CosmicMind/Samples/tree/master/Projects/Programmatic/TransitionsWithIdentifier)
+
+## UINavigationController, UITabBarController, and UIViewController Transitions
+
+Motion offers default transitions that may be used by UINavigationControllers, UITabBarControllers, and presenting UIViewControllers.
+
+| Push | Slide | ZoomSlide | Cover | Page | Fade | Zoom |
+|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
+| ![Push](http://www.cosmicmind.com/motion/transitions/push.gif)  | ![Slide](http://www.cosmicmind.com/motion/transitions/slide.gif)| ![Zoom Slide](http://www.cosmicmind.com/motion/transitions/zoom_slide.gif) | ![Cover](http://www.cosmicmind.com/motion/transitions/cover.gif) | ![Page](http://www.cosmicmind.com/motion/transitions/page_in.gif) | ![Fade](http://www.cosmicmind.com/motion/transitions/fade.gif) | ![Zoom](http://www.cosmicmind.com/motion/transitions/zoom.gif)|
+
+### Example Usage
+
+An example of transitioning from one view controller to another using a UINavigationController with a zoom transition:
+
+#### UINavigationController
+
+```swift
+class AppNavigationController: UINavigationController {
+    open override func viewDidLoad() {
+        super.viewDidLoad()
+        isMotionEnabled = true
+        motionNavigationTransitionType = .zoom
+    }
+}
+```
+
+To add an automatic reverse transition, use `autoReverse`.
+
+```swift
+motionNavigationTransitionType = .autoReverse(presenting: .zoom)
+```
+
+* [Code Samples](https://github.com/CosmicMind/Samples/tree/master/Projects/Programmatic/Transitions)
+ 
+# Animations
+
+Motion provides the building blocks necessary to create stunning animations without much effort. Motion's animation API will make maintenance a breeze and changes even easier. To create an animation, use the **animate** method of a view or layer and pass in a list of MotionAnimation structs. MotionAnimation structs are configurable values that describe how to animate a property or group of properties.
+
+| Background Color | Corder Radius | Fade | Rotate | Size | Spring |
+|:---:|:---:|:---:|:---:|:---:|:---:|
+| ![Background Color](http://www.cosmicmind.com/motion/animations/background_color.gif) | ![Corner Radius](http://www.cosmicmind.com/motion/animations/corner_radius.gif) | ![Fade](http://www.cosmicmind.com/motion/animations/fade.gif) | ![Rotate](http://www.cosmicmind.com/motion/animations/rotate.gif) | ![Size](http://www.cosmicmind.com/motion/animations/size.gif) | ![Spring](http://www.cosmicmind.com/motion/animations/spring.gif) |
+
+| Border Color & Border Width | Depth | Position | Scale | Spin | Translate |
+|:---:|:---:|:---:|:---:|:---:|:---:|
+|![Border Color & Border Width](http://www.cosmicmind.com/motion/animations/border_color.gif) | ![Depth](http://www.cosmicmind.com/motion/animations/depth.gif) | ![Position](http://www.cosmicmind.com/motion/animations/position.gif) | ![Scale](http://www.cosmicmind.com/motion/animations/scale.gif) | ![Spin](http://www.cosmicmind.com/motion/animations/spin.gif) | ![Translate](http://www.cosmicmind.com/motion/animations/translate.gif) |
+
+### Example Usage
+
+```swift
+let box = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
+box.backgroundColor = .blue
+
+box.animate(.background(color: .red), .rotate(180), .delay(1))
+```
+
+In the above code example, a box view is created with a width of 100, height of 100, and an initial background color of blue. Following the general creation of the view, the _Motion animate_ method is passed _MotionAnimation structs_ that tell the view to animate to a red background color and rotate 180 degrees after a delay of 1 second. That's pretty much the general idea of creating animations.
+
+* [MotionAnimation API](https://cosmicmind.gitbooks.io/motion/content/motion_animation_api.html)
+* [Code Samples](https://github.com/CosmicMind/Samples/tree/master/Projects/Programmatic/Animations)
+
+## Requirements
+
+* iOS 8.0+
+* Xcode 8.0+
+
+## Communication
+
+- If you **need help**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/cosmicmind). (Tag 'cosmicmind')
+- If you'd like to **ask a general question**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/cosmicmind).
+- If you **found a bug**, _and can provide steps to reliably reproduce it_, open an issue.
+- If you **have a feature request**, open an issue.
+- If you **want to contribute**, submit a pull request.
+
+## Installation
+
+> **Embedded frameworks require a minimum deployment target of iOS 8.**
+> - [Download Motion](https://github.com/CosmicMind/Motion/archive/master.zip)
+
+Visit the [Installation](https://cosmicmind.gitbooks.io/motion/content/installation.html) page to learn how to install Motion using [CocoaPods](http://cocoapods.org) and [Carthage](https://github.com/Carthage/Carthage).
+
+## Change Log
+
+Motion is a growing project and will encounter changes throughout its development. It is recommended that the [Change Log](https://cosmicmind.gitbooks.io/motion/content/change_log.html) be reviewed prior to updating versions.
+
+## License
+
+The MIT License (MIT)
+
+Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Frameworks/Motion/Sources/Animator/MotionAnimator.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public protocol MotionAnimator: class {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext! { get set }
+    
+    /// Cleans the contexts.
+    func clean()
+    
+    /**
+     A function that determines if a view can be animated.
+     - Parameter view: A UIView.
+     - Parameter isAppearing: A boolean that determines whether the
+     view is appearing.
+     */
+    func canAnimate(view: UIView, isAppearing: Bool) -> Bool
+    
+    /**
+     Animates the fromViews to the toViews.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     - Returns: A TimeInterval.
+     */
+    func animate(fromViews: [UIView], toViews: [UIView]) -> TimeInterval
+    
+    /**
+     Moves the view's animation to the given elapsed time.
+     - Parameter to elapsedTime: A TimeInterval.
+     */
+    func seek(to elapsedTime: TimeInterval)
+    
+    /**
+     Resumes the animation with a given elapsed time and
+     optional reversed boolean.
+     - Parameter at elapsedTime: A TimeInterval.
+     - Parameter isReversed: A boolean to reverse the animation
+     or not.
+     */
+    func resume(at elapsedTime: TimeInterval, isReversed: Bool) -> TimeInterval
+    
+    /**
+     Applies the given state to the given view.
+     - Parameter state: A MotionTransitionState.
+     - Parameter to view: A UIView.
+     */
+    func apply(state: MotionTransitionState, to view: UIView)
+}

Frameworks/Motion/Sources/Animator/MotionAnimatorViewContext.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+internal class MotionAnimatorViewContext {
+    /// An optional reference to a MotionAnimator.
+    var animator: MotionAnimator?
+    
+    /// A reference to the snapshot UIView.
+    var snapshot: UIView
+    
+    /// Animation duration time.
+    var duration: TimeInterval = 0
+ 
+    /// The animation target state.
+    var targetState: MotionTransitionState
+
+    /// The computed current time of the snapshot layer.
+    var currentTime: TimeInterval {
+        return snapshot.layer.convertTime(CACurrentMediaTime(), from: nil)
+    }
+    
+    /// A container view for the transition.
+    var container: UIView? {
+        return animator?.context.container
+    }
+
+    /**
+     An initializer. 
+     - Parameter animator: A MotionAnimator.
+     - Parameter snapshot: A UIView.
+     - Parameter targetState: A MotionTransitionState.
+     */
+    required init(animator: MotionAnimator, snapshot: UIView, targetState: MotionTransitionState) {
+        self.animator = animator
+        self.snapshot = snapshot
+        self.targetState = targetState
+    }
+
+    /// Cleans the context.
+    func clean() {
+        animator = nil
+    }
+    
+    /**
+     A class function that determines if a view can be animated
+     to a given state.
+     - Parameter view: A UIView.
+     - Parameter state: A MotionTransitionState.
+     - Parameter isAppearing: A boolean that determines whether the
+     view is appearing.
+     */
+    class func canAnimate(view: UIView, state: MotionTransitionState, isAppearing: Bool) -> Bool {
+        return false
+    }
+
+    /**
+     Resumes the animation with a given elapsed time and
+     optional reversed boolean.
+     - Parameter at elapsedTime: A TimeInterval.
+     - Parameter isReversed: A boolean to reverse the animation 
+     or not.
+     */
+    func resume(at elapsedTime: TimeInterval, isReversed: Bool) {}
+    
+    /**
+     Moves the animation to the given elapsed time.
+     - Parameter to elapsedTime: A TimeInterval.
+     */
+    func seek(to elapsedTime: TimeInterval) {}
+
+    /**
+     Applies the given state to the target state.
+     - Parameter state: A MotionTransitionState.
+     */
+    func apply(state: MotionTransitionState) {}
+    
+    /**
+     Starts the animations with an appearing boolean flag.
+     - Parameter isAppearing: A boolean value whether the view
+     is appearing or not.
+     */
+    func startAnimations(isAppearing: Bool) {}
+}

Frameworks/Motion/Sources/Animator/MotionHasInsertOrder.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+internal protocol MotionHasInsertOrder: class {
+    /// A boolean indicating whether to insert the toView first or not.
+    var insertToViewFirst: Bool { get set }
+}

Frameworks/Motion/Sources/Animator/MotionTransitionAnimator.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+internal class MotionTransitionAnimator<T: MotionAnimatorViewContext>: MotionAnimator, MotionHasInsertOrder {
+    /// A reference to a MotionContext.
+    weak public var context: MotionContext!
+  
+    /// An index of views to their corresponding animator context.
+    var viewToContexts = [UIView: T]()
+
+    var insertToViewFirst = false
+}
+
+extension MotionTransitionAnimator {
+    /**
+     Animates a given view.
+     - Parameter view: A UIView.
+     - Parameter isAppearing: A boolean that determines whether the
+     view is appearing.
+     */
+    fileprivate func animate(view: UIView, isAppearing: Bool) {
+        let s = context.snapshotView(for: view)
+        let v = T(animator: self, snapshot: s, targetState: context[view]!)
+        
+        viewToContexts[view] = v
+        
+        v.startAnimations(isAppearing: isAppearing)
+    }
+}
+
+extension MotionTransitionAnimator {
+    /// Cleans the contexts.
+    func clean() {
+        for v in viewToContexts.values {
+            v.clean()
+        }
+        
+        viewToContexts.removeAll()
+        insertToViewFirst = false
+    }
+    
+    /**
+     A function that determines if a view can be animated.
+     - Parameter view: A UIView.
+     - Parameter isAppearing: A boolean that determines whether the
+     view is appearing.
+     */
+    func canAnimate(view: UIView, isAppearing: Bool) -> Bool {
+        guard let state = context[view] else {
+            return false
+        }
+        
+        return T.canAnimate(view: view, state: state, isAppearing: isAppearing)
+    }
+    
+    /**
+     Animates the fromViews to the toViews.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     - Returns: A TimeInterval.
+     */
+    func animate(fromViews: [UIView], toViews: [UIView]) -> TimeInterval {
+        var duration: TimeInterval = 0
+        
+        if insertToViewFirst {
+            for v in toViews {
+                animate(view: v, isAppearing: true)
+            }
+            
+            for v in fromViews {
+                animate(view: v, isAppearing: false)
+            }
+            
+        } else {
+            for v in fromViews {
+                animate(view: v, isAppearing: false)
+            }
+            
+            for v in toViews {
+                animate(view: v, isAppearing: true)
+            }
+        }
+        
+        for v in viewToContexts.values {
+            duration = max(duration, v.duration)
+        }
+        
+        return duration
+    }
+    
+    /**
+     Moves the view's animation to the given elapsed time.
+     - Parameter to elapsedTime: A TimeInterval.
+     */
+    func seek(to elapsedTime: TimeInterval) {
+        for v in viewToContexts.values {
+            v.seek(to: elapsedTime)
+        }
+    }
+    
+    /**
+     Resumes the animation with a given elapsed time and
+     optional reversed boolean.
+     - Parameter at elapsedTime: A TimeInterval.
+     - Parameter isReversed: A boolean to reverse the animation
+     or not.
+     */
+    func resume(at elapsedTime: TimeInterval, isReversed: Bool) -> TimeInterval {
+        var duration: TimeInterval = 0
+        
+        for (_, v) in viewToContexts {
+            v.resume(at: elapsedTime, isReversed: isReversed)
+            duration = max(duration, v.duration)
+        }
+        
+        return duration
+    }
+    
+    /**
+     Applies the given state to the given view.
+     - Parameter state: A MotionTransitionState.
+     - Parameter to view: A UIView.
+     */
+    func apply(state: MotionTransitionState, to view: UIView) {
+        guard let v = viewToContexts[view] else {
+            return
+        }
+        
+        v.apply(state: state)
+    }
+}

Frameworks/Motion/Sources/Animator/MotionViewPropertyViewContext.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+@available(iOS 10, tvOS 10, *)
+internal class MotionViewPropertyViewContext: MotionAnimatorViewContext {
+    /// A reference to the UIViewPropertyAnimator.
+    fileprivate var viewPropertyAnimator: UIViewPropertyAnimator?
+    
+    override class func canAnimate(view: UIView, state: MotionTransitionState, isAppearing: Bool) -> Bool {
+        return view is UIVisualEffectView && nil != state.opacity
+    }
+
+    override func resume(at elapsedTime: TimeInterval, isReversed: Bool) {
+        viewPropertyAnimator?.finishAnimation(at: isReversed ? .start : .end)
+    }
+
+    override func seek(to elapsedTime: TimeInterval) {
+        viewPropertyAnimator?.pauseAnimation()
+        viewPropertyAnimator?.fractionComplete = CGFloat(elapsedTime / duration)
+    }
+
+    override func clean() {
+        super.clean()
+        viewPropertyAnimator?.stopAnimation(true)
+        viewPropertyAnimator = nil
+    }
+
+    override func startAnimations(isAppearing: Bool) {
+        guard let v = snapshot as? UIVisualEffectView else {
+            return
+        }
+        
+        let appearedEffect = v.effect
+        let disappearedEffect = 0 == targetState.opacity ? nil : v.effect
+        v.effect = isAppearing ? disappearedEffect : appearedEffect
+
+        duration = targetState.duration!
+        
+        viewPropertyAnimator = UIViewPropertyAnimator(duration: duration, curve: .easeInOut) {
+            v.effect = isAppearing ? appearedEffect : disappearedEffect
+        }
+        
+        viewPropertyAnimator?.startAnimation()
+    }
+}

Frameworks/Motion/Sources/Extensions/Motion+Array.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+internal extension Array {
+    /**
+     Retrieves the element at the given index if it exists.
+     - Parameter _ index: An Int.
+     - Returns: An optional Element value.
+     */
+    func get(_ index: Int) -> Element? {
+        if index < count {
+            return self[index]
+        }
+        return nil
+    }
+}

Frameworks/Motion/Sources/Extensions/Motion+CAMediaTimingFunction.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+import UIKit
+ 
+public extension CAMediaTimingFunction {
+    //  default
+    static let linear = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
+    static let easeIn = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
+    static let easeOut = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
+    static let easeInOut = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
+    
+    //  material
+    static let standard = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 0.2, 1.0)
+    static let deceleration = CAMediaTimingFunction(controlPoints: 0.0, 0.0, 0.2, 1)
+    static let acceleration = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 1, 1)
+    static let sharp = CAMediaTimingFunction(controlPoints: 0.4, 0.0, 0.6, 1)
+    
+    // easing.net
+    static let easeOutBack = CAMediaTimingFunction(controlPoints: 0.175, 0.885, 0.32, 1.75)
+}

Frameworks/Motion/Sources/Extensions/Motion+CG.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import MetalKit
+
+extension CGSize {
+    /// THe center point based on width and height.
+    var center: CGPoint {
+        return CGPoint(x: width / 2, y: height / 2)
+    }
+    
+    /// Top left point based on the size.
+    var topLeft: CGPoint {
+        return .zero
+    }
+    
+    /// Top right point based on the size.
+    var topRight: CGPoint {
+        return CGPoint(x: width, y: 0)
+    }
+    
+    /// Bottom left point based on the size.
+    var bottomLeftPoint: CGPoint {
+        return CGPoint(x: 0, y: height)
+    }
+    
+    /// Bottom right point based on the size.
+    var bottomRight: CGPoint {
+        return CGPoint(x: width, y: height)
+    }
+    
+    /**
+     Retrieves the size based on a given CGAffineTransform.
+     - Parameter _ t: A CGAffineTransform.
+     - Returns: A CGSize.
+     */
+    func transform(_ t: CGAffineTransform) -> CGSize {
+        return applying(t)
+    }
+    
+    /**
+     Retrieves the size based on a given CATransform3D.
+     - Parameter _ t: A CGAffineTransform.
+     - Returns: A CGSize.
+     */
+    func transform(_ t: CATransform3D) -> CGSize {
+        return applying(CATransform3DGetAffineTransform(t))
+    }
+}
+
+extension CGRect {
+    /// A center point based on the origin and size values.
+    var center: CGPoint {
+        return CGPoint(x: origin.x + size.width / 2, y: origin.y + size.height / 2)
+    }
+    
+    /// The bounding box size based from from the frame's rect.
+    var bounds: CGRect {
+        return CGRect(origin: .zero, size: size)
+    }
+    
+    /**
+     An initializer with a given point and size.
+     - Parameter center: A CGPoint.
+     - Parameter size: A CGSize.
+     */
+    init(center: CGPoint, size: CGSize) {
+        self.init(x: center.x - size.width / 2, y: center.y - size.height / 2, width: size.width, height: size.height)
+    }
+}
+
+extension CGFloat {
+    /**
+     Calculates the limiting position to an area.
+     - Parameter _ a: A CGFloat.
+     - Parameter _ b: A CGFloat.
+     - Returns: A CGFloat.
+     */
+    func clamp(_ a: CGFloat, _ b: CGFloat) -> CGFloat {
+        return self < a ? a : self > b ? b : self
+    }
+}
+
+extension CGPoint {
+    /**
+     Calculates a translation point based on the origin value.
+     - Parameter _ dx: A CGFloat.
+     - Parameter _ dy: A CGFloat.
+     - Returns: A CGPoint.
+     */
+    func translate(_ dx: CGFloat, dy: CGFloat) -> CGPoint {
+        return CGPoint(x: x + dx, y: y + dy)
+    }
+    
+    /**
+     Calculates a transform point based on a given CGAffineTransform.
+     - Parameter _ t: CGAffineTransform.
+     - Returns: A CGPoint.
+     */
+    func transform(_ t: CGAffineTransform) -> CGPoint {
+        return applying(t)
+    }
+    
+    /**
+     Calculates a transform point based on a given CATransform3D.
+     - Parameter _ t: CATransform3D.
+     - Returns: A CGPoint.
+     */
+    func transform(_ t: CATransform3D) -> CGPoint {
+        return applying(CATransform3DGetAffineTransform(t))
+    }
+    
+    /**
+     Calculates the distance between the CGPoint and given CGPoint.
+     - Parameter _ b: A CGPoint.
+     - Returns: A CGFloat.
+     */
+    func distance(_ b: CGPoint) -> CGFloat {
+        return sqrt(pow(x - b.x, 2) + pow(y - b.y, 2))
+    }
+}
+
+/**
+ A handler for the (+) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func +(left: CGPoint, right: CGPoint) -> CGPoint {
+    return CGPoint(x: left.x + right.x, y: left.y + right.y)
+}
+
+/**
+ A handler for the (-) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func -(left: CGPoint, right: CGPoint) -> CGPoint {
+    return CGPoint(x: left.x - right.x, y: left.y - right.y)
+}
+
+/**
+ A handler for the (/) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGFloat.
+ - Returns: A CGPoint.
+ */
+func /(left: CGPoint, right: CGFloat) -> CGPoint {
+    return CGPoint(x: left.x / right, y: left.y / right)
+}
+
+/**
+ A handler for the (/) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func /(left: CGPoint, right: CGPoint) -> CGPoint {
+    return CGPoint(x: left.x / right.x, y: left.y / right.y)
+}
+
+/**
+ A handler for the (/) operator.
+ - Parameter left: A CGSize.
+ - Parameter right: A CGSize.
+ - Returns: A CGSize.
+ */
+func /(left: CGSize, right: CGSize) -> CGSize {
+    return CGSize(width: left.width / right.width, height: left.height / right.height)
+}
+
+/**
+ A handler for the (*) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGFloat.
+ - Returns: A CGPoint.
+ */
+func *(left: CGPoint, right: CGFloat) -> CGPoint {
+    return CGPoint(x: left.x * right, y: left.y * right)
+}
+
+/**
+ A handler for the (*) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGSize.
+ - Returns: A CGPoint.
+ */
+func *(left: CGPoint, right: CGSize) -> CGPoint {
+    return CGPoint(x: left.x * right.width, y: left.y * right.width)
+}
+
+/**
+ A handler for the (*) operator.
+ - Parameter left: A CGFloat.
+ - Parameter right: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func *(left: CGFloat, right: CGPoint) -> CGPoint {
+    return right * left
+}
+
+/**
+ A handler for the (*) operator.
+ - Parameter left: A CGPoint.
+ - Parameter right: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func *(left: CGPoint, right: CGPoint) -> CGPoint {
+    return CGPoint(x: left.x * right.x, y: left.y * right.y)
+}
+
+/**
+ A handler for the (*) prefix.
+ - Parameter left: A CGSize.
+ - Parameter right: A CGFloat.
+ - Returns: A CGSize.
+ */
+func *(left: CGSize, right: CGFloat) -> CGSize {
+    return CGSize(width: left.width * right, height: left.height * right)
+}
+
+/**
+ A handler for the (*) prefix.
+ - Parameter left: A CGSize.
+ - Parameter right: A CGSize.
+ - Returns: A CGSize.
+ */
+func *(left: CGSize, right: CGSize) -> CGSize {
+    return CGSize(width: left.width * right.width, height: left.height * right.width)
+}
+
+/**
+ A handler for the (==) operator.
+ - Parameter lhs: A CATransform3D.
+ - Parameter rhs: A CATransform3D.
+ - Returns: A Bool.
+ */
+func ==(lhs: CATransform3D, rhs: CATransform3D) -> Bool {
+    var lhs = lhs
+    var rhs = rhs
+    return memcmp(&lhs, &rhs, MemoryLayout<CATransform3D>.size) == 0
+}
+
+/**
+ A handler for the (!=) operator.
+ - Parameter lhs: A CATransform3D.
+ - Parameter rhs: A CATransform3D.
+ - Returns: A Bool.
+ */
+func !=(lhs: CATransform3D, rhs: CATransform3D) -> Bool {
+    return !(lhs == rhs)
+}
+
+/**
+ A handler for the (-) prefix.
+ - Parameter point: A CGPoint.
+ - Returns: A CGPoint.
+ */
+prefix func -(point: CGPoint) -> CGPoint {
+    return CGPoint.zero - point
+}
+
+/**
+ A handler for the (abs) function.
+ - Parameter _ p: A CGPoint.
+ - Returns: A CGPoint.
+ */
+func abs(_ p: CGPoint) -> CGPoint {
+    return CGPoint(x: abs(p.x), y: abs(p.y))
+}

Frameworks/Motion/Sources/Extensions/Motion+Obj-C.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+internal struct AssociatedObject {
+    /**
+     Gets the Obj-C reference for the instance object within the UIView extension.
+     - Parameter base: Base object.
+     - Parameter key: Memory key pointer.
+     - Parameter initializer: Object initializer.
+     - Returns: The associated reference for the initializer object.
+     */
+    public static func get<T: Any>(base: Any, key: UnsafePointer<UInt8>, initializer: () -> T) -> T {
+        if let v = objc_getAssociatedObject(base, key) as? T {
+            return v
+        }
+        
+        let v = initializer()
+        objc_setAssociatedObject(base, key, v, .OBJC_ASSOCIATION_RETAIN)
+        return v
+    }
+    
+    /**
+     Sets the Obj-C reference for the instance object within the UIView extension.
+     - Parameter base: Base object.
+     - Parameter key: Memory key pointer.
+     - Parameter value: The object instance to set for the associated object.
+     - Returns: The associated reference for the initializer object.
+     */
+    public static func set<T: Any>(base: Any, key: UnsafePointer<UInt8>, value: T) {
+        objc_setAssociatedObject(base, key, value, .OBJC_ASSOCIATION_RETAIN)
+    }
+}

Frameworks/Motion/Sources/Extensions/Motion+UIKit.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+fileprivate let parameterRegex = "(?:\\-?\\d+(\\.?\\d+)?)|\\w+"
+fileprivate let transitionsRegex = "(\\w+)(?:\\(([^\\)]*)\\))?"
+
+internal extension NSObject {
+    /// Copies an object using NSKeyedArchiver.
+    func copyWithArchiver() -> Any? {
+        return NSKeyedUnarchiver.unarchiveObject(with: NSKeyedArchiver.archivedData(withRootObject: self))!
+    }
+}
+
+internal extension UIColor {
+    /// A tuple of the rgba components.
+    var components: (r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat) {
+        var r: CGFloat = 0
+        var g: CGFloat = 0
+        var b: CGFloat = 0
+        var a: CGFloat = 0
+        
+        getRed(&r, green: &g, blue: &b, alpha: &a)
+        
+        return (r, g, b, a)
+    }
+    
+    /// The alpha component value.
+    var alphaComponent: CGFloat {
+        return components.a
+    }
+}

Frameworks/Motion/Sources/Extensions/Motion+UIView.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+fileprivate var AssociatedInstanceKey: UInt8 = 0
+
+fileprivate struct AssociatedInstance {
+    /// A boolean indicating whether Motion is enabled.
+    fileprivate var isEnabled: Bool
+    
+    /// An optional reference to the motion identifier.
+    fileprivate var identifier: String?
+    
+    /// An optional reference to the motion animations.
+    fileprivate var animations: [MotionAnimation]?
+    
+    /// An optional reference to the motion transition animations.
+    fileprivate var transitions: [MotionTransition]?
+    
+    /// An alpha value.
+    fileprivate var alpha: CGFloat?
+}
+
+fileprivate extension UIView {
+    /// AssociatedInstance reference.
+    fileprivate var associatedInstance: AssociatedInstance {
+        get {
+            return AssociatedObject.get(base: self, key: &AssociatedInstanceKey) {
+                return AssociatedInstance(isEnabled: true, identifier: nil, animations: nil, transitions: nil, alpha: 1)
+            }
+        }
+        set(value) {
+            AssociatedObject.set(base: self, key: &AssociatedInstanceKey, value: value)
+        }
+    }
+}
+
+public extension UIView {
+    /// A boolean that indicates whether motion is enabled.
+    @IBInspectable
+    var isMotionEnabled: Bool {
+        get {
+            return associatedInstance.isEnabled
+        }
+        set(value) {
+            associatedInstance.isEnabled = value
+        }
+    }
+    
+    /// An identifier value used to connect views across UIViewControllers.
+    @IBInspectable
+    var motionIdentifier: String? {
+        get {
+            return associatedInstance.identifier
+        }
+        set(value) {
+            associatedInstance.identifier = value
+        }
+    }
+    
+    /**
+     A function that accepts CAAnimation objects and executes them on the
+     view's backing layer.
+     - Parameter animations: A list of CAAnimations.
+     */
+    func animate(_ animations: CAAnimation...) {
+        layer.animate(animations)
+    }
+    
+    /**
+     A function that accepts an Array of CAAnimation objects and executes
+     them on the view's backing layer.
+     - Parameter animations: An Array of CAAnimations.
+     */
+    func animate(_ animations: [CAAnimation]) {
+        layer.animate(animations)
+    }
+    
+    /**
+     A function that accepts a list of MotionAnimation values and executes
+     them on the view's backing layer.
+     - Parameter animations: A list of MotionAnimation values.
+     */
+    func animate(_ animations: MotionAnimation...) {
+        layer.animate(animations)
+    }
+    
+    /**
+     A function that accepts an Array of MotionAnimation values and executes
+     them on the view's backing layer.
+     - Parameter animations: An Array of MotionAnimation values.
+     - Parameter completion: An optional completion block.
+     */
+    func animate(_ animations: [MotionAnimation], completion: (() -> Void)? = nil) {
+        layer.animate(animations, completion: completion)
+    }
+    
+    /**
+     A function that accepts a list of MotionTransition values.
+     - Parameter transitions: A list of MotionTransition values.
+     */
+    func transition(_ transitions: MotionTransition...) {
+        transition(transitions)
+    }
+    
+    /**
+     A function that accepts an Array of MotionTransition values.
+     - Parameter transitions: An Array of MotionTransition values.
+     */
+    func transition(_ transitions: [MotionTransition]) {
+        motionTransitions = transitions
+    }
+}
+
+internal extension UIView {
+    /// The animations to run while in transition.
+    var motionTransitions: [MotionTransition]? {
+        get {
+            return associatedInstance.transitions
+        }
+        set(value) {
+            associatedInstance.transitions = value
+        }
+    }
+    
+    /// The animations to run while in transition.
+    var motionAlpha: CGFloat? {
+        get {
+            return associatedInstance.alpha
+        }
+        set(value) {
+            associatedInstance.alpha = value
+        }
+    }
+
+    /// Computes the rotate of the view.
+    var motionRotationAngle: CGFloat {
+        get {
+            return CGFloat(atan2f(Float(transform.b), Float(transform.a))) * 180 / CGFloat(Double.pi)
+        }
+        set(value) {
+            transform = CGAffineTransform(rotationAngle: CGFloat(Double.pi) * value / 180)
+        }
+    }
+    
+    /// The global position of a view.
+    var motionPosition: CGPoint {
+        return superview?.convert(layer.position, to: nil) ?? layer.position
+    }
+    
+    /// The layer.transform of a view.
+    var motionTransform: CATransform3D {
+        get {
+            return layer.transform
+        }
+        set(value) {
+            layer.transform = value
+        }
+    }
+    
+    /// Computes the scale X axis value of the view.
+    var motionScaleX: CGFloat {
+        return transform.a
+    }
+    
+    /// Computes the scale Y axis value of the view.
+    var motionScaleY: CGFloat {
+        return transform.b
+    }
+}
+
+internal extension UIView {
+    /// Retrieves a single Array of UIViews that are in the view hierarchy.
+    var flattenedViewHierarchy: [UIView] {
+        guard isMotionEnabled else {
+            return []
+        }
+        
+        if #available(iOS 9.0, *) {
+            return isHidden && (superview is UICollectionView || superview is UIStackView || self is UITableViewCell) ? [] : ([self] + subviews.flatMap { $0.flattenedViewHierarchy })
+        }
+        
+        return isHidden && (superview is UICollectionView || self is UITableViewCell) ? [] : ([self] + subviews.flatMap { $0.flattenedViewHierarchy })
+    }
+    
+    /**
+     Retrieves the optimized duration based on the given parameters.
+     - Parameter fromPosition: A CGPoint.
+     - Parameter toPosition: An optional CGPoint.
+     - Parameter size: An optional CGSize.
+     - Parameter transform: An optional CATransform3D.
+     - Returns: A TimeInterval.
+     */
+    func optimizedDuration(fromPosition: CGPoint, toPosition: CGPoint?, size: CGSize?, transform: CATransform3D?) -> TimeInterval {
+        let toPos = toPosition ?? fromPosition
+        let fromSize = (layer.presentation() ?? layer).bounds.size
+        let toSize = size ?? fromSize
+        let fromTransform = (layer.presentation() ?? layer).transform
+        let toTransform = transform ?? fromTransform
+        
+        let realFromPos = CGPoint.zero.transform(fromTransform) + fromPosition
+        let realToPos = CGPoint.zero.transform(toTransform) + toPos
+        
+        let realFromSize = fromSize.transform(fromTransform)
+        let realToSize = toSize.transform(toTransform)
+        
+        let movePoints = realFromPos.distance(realToPos) + realFromSize.bottomRight.distance(realToSize.bottomRight)
+        
+        // duration is 0.2 @ 0 to 0.375 @ 500
+        return 0.208 + Double(movePoints.clamp(0, 500)) / 3000
+    }
+    
+    /**
+     Takes a snapshot of a view usinag the UI graphics context.
+     - Returns: A UIView with an embedded UIImageView.
+     */
+    func slowSnapshotView() -> UIView {
+        UIGraphicsBeginImageContextWithOptions(bounds.size, isOpaque, 0)
+        layer.render(in: UIGraphicsGetCurrentContext()!)
+        
+        let image = UIGraphicsGetImageFromCurrentImageContext()
+        UIGraphicsEndImageContext()
+        
+        let imageView = UIImageView(image: image)
+        imageView.frame = bounds
+        
+        let snapshotView = UIView(frame: bounds)
+        snapshotView.addSubview(imageView)
+        return snapshotView
+    }
+}

Frameworks/Motion/Sources/Extensions/MotionAnimationFillMode.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+@objc(MotionAnimationFillMode)
+public enum MotionAnimationFillMode: Int {
+    case forwards
+    case backwards
+    case both
+    case removed
+}
+
+/**
+ Converts the MotionAnimationFillMode enum value to a corresponding String.
+ - Parameter mode: An MotionAnimationFillMode enum value.
+ */
+public func MotionAnimationFillModeToValue(mode: MotionAnimationFillMode) -> String {
+    switch mode {
+    case .forwards:
+        return kCAFillModeForwards
+    case .backwards:
+        return kCAFillModeBackwards
+    case .both:
+        return kCAFillModeBoth
+    case .removed:
+        return kCAFillModeRemoved
+    }
+}

Frameworks/Motion/Sources/Info.plist

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

Frameworks/Motion/Sources/LICENSE

+The MIT License (MIT)
+
+Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

Frameworks/Motion/Sources/Motion.h

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#import <Foundation/Foundation.h>
+
+//! Project version number for Motion.
+FOUNDATION_EXPORT double MotionVersionNumber;
+
+//! Project version string for Motion.
+FOUNDATION_EXPORT const unsigned char MotionVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <Motion/PublicHeader.h>

Frameworks/Motion/Sources/MotionAnimationState.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public struct MotionAnimationState {
+    /// A reference to the position.
+    public var position: CGPoint?
+    
+    /// A reference to the size.
+    public var size: CGSize?
+    
+    /// A reference to the transform.
+    public var transform: CATransform3D?
+    
+    /// A reference to the spin tuple.
+    public var spin: (x: CGFloat, y: CGFloat, z: CGFloat)?
+    
+    /// A reference to the opacity.
+    public var opacity: Double?
+    
+    /// A reference to the cornerRadius.
+    public var cornerRadius: CGFloat?
+    
+    /// A reference to the backgroundColor.
+    public var backgroundColor: CGColor?
+    
+    /// A reference to the zPosition.
+    public var zPosition: CGFloat?
+    
+    /// A reference to the borderWidth.
+    public var borderWidth: CGFloat?
+    
+    /// A reference to the borderColor.
+    public var borderColor: CGColor?
+    
+    /// A reference to the shadowColor.
+    public var shadowColor: CGColor?
+    
+    /// A reference to the shadowOpacity.
+    public var shadowOpacity: Float?
+    
+    /// A reference to the shadowOffset.
+    public var shadowOffset: CGSize?
+    
+    /// A reference to the shadowRadius.
+    public var shadowRadius: CGFloat?
+    
+    /// A reference to the shadowPath.
+    public var shadowPath: CGPath?
+    
+    /// A reference to the spring animation settings.
+    public var spring: (CGFloat, CGFloat)?
+    
+    /// A time delay on starting the animation.
+    public var delay: TimeInterval = 0
+    
+    /// The duration of the animation.
+    public var duration: TimeInterval = 0.35
+    
+    /// The timing function value of the animation.
+    public var timingFunction = CAMediaTimingFunction.easeInOut
+    
+    /// Custom target states.
+    public var custom: [String: Any]?
+    
+    /// Completion block.
+    public var completion: (() -> Void)?
+    
+    /**
+     An initializer that accepts an Array of MotionAnimations.
+     - Parameter animations: An Array of MotionAnimations.
+     */
+    init(animations: [MotionAnimation]) {
+        append(contentsOf: animations)
+    }
+}
+
+extension MotionAnimationState {
+    /**
+     Adds a MotionAnimation to the current state.
+     - Parameter _ element: A MotionAnimation.
+     */
+    public mutating func append(_ element: MotionAnimation) {
+        element.apply(&self)
+    }
+    
+    /**
+     Adds an Array of MotionAnimations to the current state.
+     - Parameter contentsOf elements: An Array of MotionAnimations.
+     */
+    public mutating func append(contentsOf elements: [MotionAnimation]) {
+        for v in elements {
+            v.apply(&self)
+        }
+    }
+    
+    /**
+     A subscript that returns a custom value for a specified key.
+     - Parameter key: A String.
+     - Returns: An optional Any value.
+     */
+    public subscript(key: String) -> Any? {
+        get {
+            return custom?[key]
+        }
+        set(value) {
+            if nil == custom {
+                custom = [:]
+            }
+            
+            custom![key] = value
+        }
+    }
+}
+
+extension MotionAnimationState: ExpressibleByArrayLiteral {
+    /**
+     An initializer implementing the ExpressibleByArrayLiteral protocol.
+     - Parameter arrayLiteral elements: A list of MotionAnimations.
+     */
+    public init(arrayLiteral elements: MotionAnimation...) {
+        append(contentsOf: elements)
+    }
+}

Frameworks/Motion/Sources/MotionCoordinateSpace.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public enum MotionCoordinateSpace {
+    case global
+    case local
+    case sameParent
+}

Frameworks/Motion/Sources/MotionIndependentController.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public class MotionIndependentController: MotionController {
+    /// An initializer.
+    public override init() {
+        super.init()
+    }
+
+    /**
+     Transitions source views to their corresponding destination view
+     within a given root view.
+     - Parameter rootView: A UIView.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     - Parameter completion: An optional callback.
+     */
+    public func transition(rootView: UIView, fromViews: [UIView], toViews: [UIView], completion: ((Bool) -> Void)? = nil) {
+        transitionContainer = rootView
+        completionCallback = completion
+
+        prepareTransition()
+        prepareContext(fromViews: fromViews, toViews: toViews)
+        prepareTransitionPairs()
+        
+        animate()
+    }
+}
+
+fileprivate extension MotionIndependentController {
+    /** 
+     Prepares the context.
+     - Parameter fromViews: An Array of UIViews.
+     - PArameter toViews: An Array of UIViews.
+     */
+    func prepareContext(fromViews: [UIView], toViews: [UIView]) {
+        context.defaultCoordinateSpace = .sameParent
+        context.set(fromViews: fromViews, toViews: toViews)
+        processContext()
+    }
+}

Frameworks/Motion/Sources/MotionPlugin.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+open class MotionPlugin: NSObject, MotionPreprocessor, MotionAnimator {
+  weak public var context: MotionContext!
+
+  /**
+    Determines whether or not to receive `seekTo` callback on every frame.
+   
+    Default is false.
+   
+    When **requirePerFrameCallback** is **false**, the plugin needs to start its own animations inside `animate` & `resume`
+    The `seekTo` method is only being called during an interactive transition.
+   
+    When **requirePerFrameCallback** is **true**, the plugin will receive `seekTo` callback on every animation frame. Hence it is possible for the plugin to do per-frame animations without implementing `animate` & `resume`
+   */
+  open var requirePerFrameCallback = false
+
+  public override required init() {}
+
+  /**
+   Called before any animation.
+   Override this method when you want to preprocess transitions for views
+   - Parameters:
+       - context: object holding all parsed and changed transitions,
+       - fromViews: A flattened list of all views from source ViewController
+       - toViews: A flattened list of all views from destination ViewController
+
+   To check a view's transitions:
+
+       context[view]
+       context[view, "transitionName"]
+
+   To set a view's transitions:
+
+       context[view] = [("transition1", ["parameter1"]), ("transition2", [])]
+       context[view, "transition1"] = ["parameter1", "parameter2"]
+
+  */
+  open func process(fromViews: [UIView], toViews: [UIView]) {}
+
+  /**
+   - Returns: return true if the plugin can handle animating the view.
+   - Parameters:
+       - context: object holding all parsed and changed transitions,
+       - view: the view to check whether or not the plugin can handle the animation
+       - isAppearing: true if the view is isAppearing(i.e. a view in destination ViewController)
+   If return true, Motion won't animate and won't let any other plugins animate this view.
+   The view will also be hidden automatically during the animation.
+   */
+  open func canAnimate(view: UIView, isAppearing: Bool) -> Bool { return false }
+
+  /**
+   Perform the animation.
+
+   Note: views in `fromViews` & `toViews` are hidden already. Unhide then if you need to take snapshots.
+   - Parameters:
+       - context: object holding all parsed and changed transitions,
+       - fromViews: A flattened list of all views from source ViewController (filtered by `canAnimate`)
+       - toViews: A flattened list of all views from destination ViewController (filtered by `canAnimate`)
+   - Returns: The duration needed to complete the animation
+   */
+
+  open func animate(fromViews: [UIView], toViews: [UIView]) -> TimeInterval { return 0 }
+
+  /**
+   Called when all animations are completed.
+
+   Should perform cleanup and release any reference
+   */
+  open func clean() {}
+
+  /**
+   For supporting interactive animation only.
+
+   This method is called when an interactive animation is in place
+   The plugin should pause the animation, and seek to the given progress
+   - Parameters:
+     - elapsedTime: time of the animation to seek to.
+   */
+  open func seek(to elapsedTime: TimeInterval) {}
+
+  /**
+   For supporting interactive animation only.
+
+   This method is called when an interactive animation is ended
+   The plugin should resume the animation.
+   - Parameters:
+   - elapsedTime: will be the same value since last `seekTo`
+   - reverse: a boolean value indicating whether or not the animation should reverse
+   */
+  open func resume(at elapsedTime: TimeInterval, isReversed: Bool) -> TimeInterval { return 0 }
+
+  /**
+   For supporting interactive animation only.
+
+   This method is called when user wants to override animation transitions during an interactive animation
+
+   - Parameters:
+       - state: the target state to override
+       - view: the view to override
+   */
+  open func apply(state: MotionTransitionState, to view: UIView) {}
+}
+
+// methods for enable/disable the current plugin
+extension MotionPlugin {
+  public static var isEnabled: Bool {
+    get {
+      return Motion.isEnabled(plugin: self)
+    }
+    set {
+      if newValue {
+        enable()
+      } else {
+        disable()
+      }
+    }
+  }
+  public static func enable() {
+    Motion.enable(plugin: self)
+  }
+  public static func disable() {
+    Motion.disable(plugin: self)
+  }
+}

Frameworks/Motion/Sources/MotionSnapshotType.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public enum MotionSnapshotType {
+    /**
+     This setting will optimize for different types of views.
+     For custom views or views with masking, .optimizedDefault might
+     create snapshots that appear differently than the actual view.
+     In that case, use .normal or .slowRender to disable the optimization.
+     */
+    case optimized
+    
+    /// snapshotView(afterScreenUpdates:)
+    case normal
+    
+    /// layer.render(in: currentContext)
+    case layerRender
+    
+    /**
+     This setting will not create a snapshot. It will animate the view directly.
+     This will mess up the view hierarchy, therefore, view controllers have to rebuild
+     their view structure after the transition finishes.
+     */
+    case noSnapshot
+}

Frameworks/Motion/Sources/MotionTransitionObserver.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import Foundation
+
+public protocol MotionTransitionObserver {
+    /**
+     Executed when the elapsed time changes during a transition.
+     - Parameter transitionObserver: A MotionTransitionObserver. 
+     - Parameter didUpdateWith elapsedTime: A TimeInterval.
+     */
+    func motion(transitionObserver: MotionTransitionObserver, didUpdateWith elapsedTime: TimeInterval)
+}

Frameworks/Motion/Sources/MotionTransitionState.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+internal class MotionTransitionStateWrapper {
+    /// A reference to a MotionTransitionState.
+    internal var state: MotionTransitionState
+    
+    /**
+     An initializer that accepts a given MotionTransitionState.
+     - Parameter state: A MotionTransitionState.
+     */
+    internal init(state: MotionTransitionState) {
+        self.state = state
+    }
+}
+
+public struct MotionTransitionState {
+    /// The initial state that the transition will start at.
+    internal var beginState: MotionTransitionStateWrapper?
+    
+    /// The start state if there is a match in the desition view controller.
+    public var beginStateIfMatched: [MotionTransition]?
+
+    /// A reference to the position.
+    public var position: CGPoint?
+    
+    /// A reference to the size.
+    public var size: CGSize?
+    
+    /// A reference to the transform.
+    public var transform: CATransform3D?
+    
+    /// A reference to the opacity.
+    public var opacity: Double?
+    
+    /// A reference to the cornerRadius.
+    public var cornerRadius: CGFloat?
+    
+    /// A reference to the backgroundColor.
+    public var backgroundColor: CGColor?
+    
+    /// A reference to the zPosition.
+    public var zPosition: CGFloat?
+
+    /// A reference to the contentsRect.
+    public var contentsRect: CGRect?
+    
+    /// A reference to the contentsScale.
+    public var contentsScale: CGFloat?
+
+    /// A reference to the borderWidth.
+    public var borderWidth: CGFloat?
+    
+    /// A reference to the borderColor.
+    public var borderColor: CGColor?
+
+    /// A reference to the shadowColor.
+    public var shadowColor: CGColor?
+    
+    /// A reference to the shadowOpacity.
+    public var shadowOpacity: Float?
+    
+    /// A reference to the shadowOffset.
+    public var shadowOffset: CGSize?
+    
+    /// A reference to the shadowRadius.
+    public var shadowRadius: CGFloat?
+    
+    /// A reference to the shadowPath.
+    public var shadowPath: CGPath?
+    
+    /// A boolean for the masksToBounds state.
+    public var masksToBounds: Bool?
+    
+    /// A boolean indicating whether to display a shadow or not.
+    public var displayShadow = true
+
+    /// A reference to the overlay settings.
+    public var overlay: (color: CGColor, opacity: CGFloat)?
+
+    /// A reference to the spring animation settings.
+    public var spring: (CGFloat, CGFloat)?
+    
+    /// A time delay on starting the animation.
+    public var delay: TimeInterval = 0
+    
+    /// The duration of the animation.
+    public var duration: TimeInterval?
+    
+    /// The timing function value of the animation.
+    public var timingFunction: CAMediaTimingFunction?
+
+    /// The arc curve value.
+    public var arc: CGFloat?
+    
+    /// The identifier value to match source and destination views.
+    public var motionIdentifier: String?
+    
+    /// The cascading animation settings.
+    public var cascade: (TimeInterval, CascadeDirection, Bool)?
+
+    /** 
+     A boolean indicating whether to ignore the subview transition
+     animations or not.
+     */
+    public var ignoreSubviewTransitions: Bool?
+    
+    /// The coordinate space to transition views within.
+    public var coordinateSpace: MotionCoordinateSpace?
+    
+    /// Change the size of a view based on a scale factor.
+    public var useScaleBasedSizeChange: Bool?
+    
+    /// The type of snapshot to use.
+    public var snapshotType: MotionSnapshotType?
+
+    /// Do not fade the view when transitioning.
+    public var nonFade = false
+    
+    /// Force an animation.
+    public var forceAnimate = false
+    
+    /// Custom target states.
+    public var custom: [String: Any]?
+
+    /**
+     An initializer that accepts an Array of MotionTransitions.
+     - Parameter transitions: An Array of MotionTransitions.
+     */
+    init(transitions: [MotionTransition]) {
+        append(contentsOf: transitions)
+    }
+}
+
+extension MotionTransitionState {
+    /**
+     Adds a MotionTransition to the current state.
+     - Parameter _ element: A MotionTransition.
+     */
+    public mutating func append(_ element: MotionTransition) {
+        element.apply(&self)
+    }
+    
+    /**
+     Adds an Array of MotionTransitions to the current state.
+     - Parameter contentsOf elements: An Array of MotionTransitions.
+     */
+    public mutating func append(contentsOf elements: [MotionTransition]) {
+        for v in elements {
+            v.apply(&self)
+        }
+    }
+    
+    /**
+     A subscript that returns a custom value for a specified key.
+     - Parameter key: A String.
+     - Returns: An optional Any value.
+     */
+    public subscript(key: String) -> Any? {
+        get {
+            return custom?[key]
+        }
+        set(value) {
+            if nil == custom {
+                custom = [:]
+            }
+            
+            custom![key] = value
+        }
+    }
+}
+
+extension MotionTransitionState: ExpressibleByArrayLiteral {
+    /**
+     An initializer implementing the ExpressibleByArrayLiteral protocol.
+     - Parameter arrayLiteral elements: A list of MotionTransitions.
+     */
+    public init(arrayLiteral elements: MotionTransition...) {
+        append(contentsOf: elements)
+    }
+}

Frameworks/Motion/Sources/Preprocessors/CascadePreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public enum CascadeDirection {
+    case topToBottom
+    case bottomToTop
+    case leftToRight
+    case rightToLeft
+    case radial(center:CGPoint)
+    case inverseRadial(center:CGPoint)
+  
+    /// Based on the cascade direction a comparator is set.
+    var comparator: (UIView, UIView) -> Bool {
+        switch self {
+        case .topToBottom:
+            return { return $0.frame.minY < $1.frame.minY }
+    
+        case .bottomToTop:
+            return { return $0.frame.maxY == $1.frame.maxY ? $0.frame.maxX > $1.frame.maxX : $0.frame.maxY > $1.frame.maxY }
+        
+        case .leftToRight:
+            return { return $0.frame.minX < $1.frame.minX }
+    
+        case .rightToLeft:
+            return { return $0.frame.maxX > $1.frame.maxX }
+    
+        case .radial(let center):
+            return { return $0.center.distance(center) < $1.center.distance(center) }
+    
+        case .inverseRadial(let center):
+            return { return $0.center.distance(center) > $1.center.distance(center) }
+        }
+    }
+}
+
+class CascadePreprocessor: MotionPreprocessor {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext!
+    
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView]) {
+        process(views: fromViews)
+        process(views: toViews)
+    }
+
+    /**
+     Process an Array of views for the cascade animation.
+     - Parameter views: An Array of UIViews.
+     */
+    func process(views: [UIView]) {
+        for v in views {
+            guard let (deltaTime, direction, delayMatchedViews) = context[v]?.cascade else {
+                continue
+            }
+
+            let parentView = v is UITableView ? v.subviews.get(0) ?? v : v
+            let sortedSubviews = parentView.subviews.sorted(by: direction.comparator)
+
+            let initialDelay = context[v]!.delay
+            let finalDelay = TimeInterval(sortedSubviews.count) * deltaTime + initialDelay
+
+            for (i, subview) in sortedSubviews.enumerated() {
+                let delay = TimeInterval(i) * deltaTime + initialDelay
+
+                func applyDelay(view: UIView) {
+                    if context.transitionPairedView(for: view) == nil {
+                        context[view]?.delay = delay
+                    
+                    } else if delayMatchedViews, let paired = context.transitionPairedView(for: view) {
+                        context[view]?.delay = finalDelay
+                        context[paired]?.delay = finalDelay
+                    }
+                    
+                    for subview in view.subviews {
+                        applyDelay(view: subview)
+                    }
+                }
+
+                applyDelay(view: subview)
+            }
+        }
+    }
+}

Frameworks/Motion/Sources/Preprocessors/DurationPreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+class DurationPreprocessor: MotionPreprocessor {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext!
+    
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView]) {
+        var maxDuration: TimeInterval = 0
+        maxDuration = applyOptimizedDurationIfNoDuration(views:fromViews)
+        maxDuration = max(maxDuration, applyOptimizedDurationIfNoDuration(views:toViews))
+        setDurationForInfiniteDuration(views: fromViews, duration: maxDuration)
+        setDurationForInfiniteDuration(views: toViews, duration: maxDuration)
+    }
+
+    /**
+     Retrieves the optimized duration for a given UIView.
+     - Parameter for view: A UIView.
+     - Returns: A TimeInterval.
+     */
+    func optimizedDuration(for view: UIView) -> TimeInterval {
+        let v = context[view]!
+        
+        return view.optimizedDuration(fromPosition: context.container.convert(view.layer.position, from: view.superview),
+                                        toPosition: v.position,
+                                              size: v.size,
+                                         transform: v.transform)
+    }
+
+    /**
+     Applies the optimized duration for an Array of UIViews.
+     - Parameter views: An Array of UIViews.
+     - Returns: A TimeInterval.
+    */
+    func applyOptimizedDurationIfNoDuration(views: [UIView]) -> TimeInterval {
+        var d: TimeInterval = 0
+        
+        for v in views where nil != context[v] {
+            if nil == context[v]?.duration {
+                context[v]!.duration = optimizedDuration(for: v)
+            }
+            
+            d = .infinity == context[v]!.duration! ?
+                    max(d, optimizedDuration(for: v)) :
+                    max(d, context[v]!.duration!)
+        }
+        
+        return d
+    }
+
+    /**
+     Sets the duration if the duration of a transition is set to `.infinity`.
+     - Parameter views: An Array of UIViews.
+     - Parameter duration: A TimeInterval.
+     */
+    func setDurationForInfiniteDuration(views: [UIView], duration: TimeInterval) {
+        for v in views where .infinity == context[v]?.duration {
+            context[v]!.duration = duration
+        }
+    }
+}

Frameworks/Motion/Sources/Preprocessors/IgnoreSubviewModifiersPreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+class IgnoreSubviewTransitionsPreprocessor: MotionPreprocessor {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext!
+    
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView]) {
+        process(views:fromViews)
+        process(views:toViews)
+    }
+
+    /**
+     Process an Array of views for the cascade animation.
+     - Parameter views: An Array of UIViews.
+     */
+    func process(views: [UIView]) {
+        for v in views {
+            guard let recursive = context[v]?.ignoreSubviewTransitions else {
+                continue
+            }
+            
+            let parentView = v is UITableView ? v.subviews.get(0) ?? v : v
+
+            guard recursive else {
+                for subview in parentView.subviews {
+                    context[subview] = nil
+                }
+                
+                continue
+            }
+            
+            cleanSubviewTransitions(for: parentView)
+        }
+    }
+}
+
+extension IgnoreSubviewTransitionsPreprocessor {
+    /**
+     Clears the transition for a given view's subviews.
+     - Parameter for view: A UIView.
+     */
+    fileprivate func cleanSubviewTransitions(for view: UIView) {
+        for v in view.subviews {
+            context[v] = nil
+            cleanSubviewTransitions(for: v)
+        }
+    }
+}

Frameworks/Motion/Sources/Preprocessors/MatchPreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+class MatchPreprocessor: MotionPreprocessor {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext!
+    
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView]) {
+        for tv in toViews {
+            guard let i = tv.motionIdentifier, let fv = context.sourceView(for: i) else { continue }
+            
+            var tvState = context[tv] ?? MotionTransitionState()
+            var fvState = context[fv] ?? MotionTransitionState()
+            
+            if let v = tvState.beginStateIfMatched {
+                tvState.append(.beginWith(transitions: v))
+            }
+            
+            if let v = fvState.beginStateIfMatched {
+                fvState.append(.beginWith(transitions: v))
+            }
+            
+            tvState.motionIdentifier = i
+            tvState.opacity = 0
+            
+            fvState.motionIdentifier = i
+            fvState.arc = tvState.arc
+            fvState.duration = tvState.duration
+            fvState.timingFunction = tvState.timingFunction
+            fvState.delay = tvState.delay
+            fvState.spring = tvState.spring
+            
+            let forceNonFade = tvState.nonFade || fvState.nonFade
+            let isNonOpaque = !fv.isOpaque || fv.alpha < 1 || !tv.isOpaque || tv.alpha < 1
+            
+            if !forceNonFade && isNonOpaque {
+                // Cross fade if from/toViews are not opaque.
+                fvState.opacity = 0
+                
+            } else {
+                // No cross fade in this case, fromView is always displayed during the transition.
+                fvState.opacity = nil
+                
+                /**
+                 We dont want two shadows showing up. Therefore we disable toView's
+                 shadow when fromView is able to display its shadow.
+                 */
+                if !fv.layer.masksToBounds && fvState.displayShadow {
+                    tvState.displayShadow = false
+                }
+            }
+            
+            context[tv] = tvState
+            context[fv] = fvState
+        }
+    }
+}

Frameworks/Motion/Sources/Preprocessors/MotionPreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+public protocol MotionPreprocessor: class {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext! { get set }
+    
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView])
+}

Frameworks/Motion/Sources/Preprocessors/SourcePreprocessor.swift

+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Original Inspiration & Author
+ * Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import UIKit
+
+class SourcePreprocessor: MotionPreprocessor {
+    /// A reference to a MotionContext.
+    weak var context: MotionContext!
+
+    /**
+     Processes the transitionary views.
+     - Parameter fromViews: An Array of UIViews.
+     - Parameter toViews: An Array of UIViews.
+     */
+    func process(fromViews: [UIView], toViews: [UIView]) {
+        for fv in fromViews {
+            guard let i = context[fv]?.motionIdentifier, let tv = context.destinationView(for: i) else {
+                continue
+            }
+            
+            prepare(view: fv, for: tv)
+        }
+        
+        for tv in toViews {
+            guard let i = context[tv]?.motionIdentifier, let fv = context.sourceView(for: i) else {
+                continue
+            }
+            
+            prepare(view: tv, for: fv)
+        }
+    }
+
+    /**
+     Prepares a given view for a target view.
+     - Parameter view: A UIView.
+     - Parameter for targetView: A UIView.
+     */
+    func prepare(view: UIView, for targetView: UIView) {
+        let targetPos = context.container.convert(targetView.layer.position, from: targetView.superview!)
+        var state = context[view]!
+
+        /**
+         Use global coordinate space since over target position is 
+         converted from the global container
+         */
+        state.coordinateSpace = .global
+
+        // Remove incompatible options.
+        state.position = targetPos
+        state.transform = nil
+        state.size = nil
+        state.cornerRadius = nil
+
+        if view.bounds.size != targetView.bounds.size {
+            state.size = targetView.bounds.size
+        }
+
+        if view.layer.cornerRadius != targetView.layer.cornerRadius {
+            state.cornerRadius = targetView.layer.cornerRadius
+        }
+        
+        if view.layer.transform != targetView.layer.transform {
+            state.transform = targetView.layer.transform
+        }
+        
+        if view.layer.shadowColor != targetView.layer.shadowColor {
+            state.shadowColor = targetView.layer.shadowColor
+        }
+        
+        if view.layer.shadowOpacity != targetView.layer.shadowOpacity {
+            state.shadowOpacity = targetView.layer.shadowOpacity
+        }
+        
+        if view.layer.shadowOffset != targetView.layer.shadowOffset {
+            state.shadowOffset = targetView.layer.shadowOffset
+        }
+        
+        if view.layer.shadowRadius != targetView.layer.shadowRadius {
+            state.shadowRadius = targetView.layer.shadowRadius
+        }
+        
+        if view.layer.shadowPath != targetView.layer.shadowPath {
+            state.shadowPath = targetView.layer.shadowPath
+        }
+        
+        if view.layer.contentsRect != targetView.layer.contentsRect {
+            state.contentsRect = targetView.layer.contentsRect
+        }
+        
+        if view.layer.contentsScale != targetView.layer.contentsScale {
+            state.contentsScale = targetView.layer.contentsScale
+        }
+
+        context[view] = state
+    }
+}

Material.xcodeproj/project.pbxproj

@@ -938,7 +938,6 @@
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 			isa = PBXNativeTarget;
 			buildConfigurationList = 9638324C1B88DFD80015F710 /* Build configuration list for PBXNativeTarget "Material" */;
 			buildConfigurationList = 9638324C1B88DFD80015F710 /* Build configuration list for PBXNativeTarget "Material" */;
 			buildPhases = (
 			buildPhases = (
-				96FE06EF1F15370900E34953 /* ShellScript */,
 				963832311B88DFD80015F710 /* Sources */,
 				963832311B88DFD80015F710 /* Sources */,
 				963832331B88DFD80015F710 /* Headers */,
 				963832331B88DFD80015F710 /* Headers */,
 				963832341B88DFD80015F710 /* Resources */,
 				963832341B88DFD80015F710 /* Resources */,
@@ -1005,22 +1004,6 @@
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 		};
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 /* End PBXResourcesBuildPhase section */
 
 
-/* Begin PBXShellScriptBuildPhase section */
-		96FE06EF1F15370900E34953 /* ShellScript */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "git submodule update --init --recursive";
-		};
-/* End PBXShellScriptBuildPhase section */
-
 /* Begin PBXSourcesBuildPhase section */
 /* Begin PBXSourcesBuildPhase section */
 		963832311B88DFD80015F710 /* Sources */ = {
 		963832311B88DFD80015F710 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			isa = PBXSourcesBuildPhase;