added CHANGELOG and fixed snapshot issue in iOS 11

CHANGELOG.md

+## 1.2.2
+
+* Updated Motion for iOS 11, where snapshot would no longer include a container view.
+
+## 1.2.1
+
+* Submodule access rights update for [Material](https://github.com/CosmicMind/Material).
+
+## 1.2.0
+
+* Updated to `Swift 4`.
+* Fixed a couple memory leaks.
+
+## 1.1.2
+
+* Minor internal updates.
+
+## 1.1.1
+
+* Added Motion logo to README.
+
+## 1.1.0
+
+* [issue-5](https://github.com/CosmicMind/Motion/issues/5): Added the ability to add custom timing functions.
+* [issue-4](https://github.com/CosmicMind/Motion/issues/4): Fixed an issue where a white flash occurred when pushing/popping a view controller.
+* [issue-8](https://github.com/CosmicMind/Motion/issues/8): Added the ability to add animation immediately.
+* [issue-6](https://github.com/CosmicMind/Motion/issues/6): Added the ability to animate views that are not paired.

Motion.podspec

 Pod::Spec.new do |s|
   s.name = 'Motion'
-  s.version = '1.2.1'
+  s.version = '1.2.2'
   s.license = 'MIT'
   s.summary = 'A library used to create beautiful animations and transitions for Apple devices.'
   s.homepage = 'http://cosmicmind.com'

README.md

@@ -129,11 +129,11 @@ In the above code example, a box view is created with a width of 100, height of
 > **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).
+Read [Material - It's time to download](https://www.cosmicmind.com/danieldahan/lesson/6) to learn how to install Material using [GitHub](http://github.com), [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.
+Motion is a growing project and will encounter changes throughout its development. It is recommended that the [Change Log](https://github.com/CosmicMind/Motion/blob/master/CHANGELOG.md) be reviewed prior to updating versions.
 
 ## License
 

Sources/Extensions/Motion+UIView.swift

@@ -210,7 +210,13 @@ internal extension UIView {
 }
 
 internal class SnapshotWrapperView: UIView {
+    /// A reference to the contentView.
     let contentView: UIView
+    
+    /**
+     An initializer that takes in a contentView.
+     - Parameter contentView: A UIView.
+     */
     init(contentView: UIView) {
         self.contentView = contentView
         super.init(frame: contentView.frame)
@@ -269,7 +275,7 @@ internal extension UIView {
         
         let movePoints = realFromPos.distance(realToPos) + realFromSize.bottomRight.distance(realToSize.bottomRight)
         
-        // duration is 0.2 @ 0 to 0.375 @ 500
+        // Duration is 0.2 @ 0 to 0.375 @ 500
         return 0.208 + Double(movePoints.clamp(0, 500)) / 3000
     }
     
@@ -298,7 +304,7 @@ internal extension UIView {
         let snapshot = snapshotView(afterScreenUpdates: true)
         
         if #available(iOS 11.0, *), let oldSnapshot = snapshot {
-            /// iOS 11 no longer contains a container view.
+            // iOS 11 no longer contains a container view.
             return SnapshotWrapperView(contentView: oldSnapshot)
         }
         

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.2.1</string>
+	<string>1.2.2</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>

Sources/MotionContext.swift

@@ -191,14 +191,14 @@ public extension MotionContext {
         
         unhide(view: view)
         
-        /// Capture a snapshot without alpha & cornerRadius.
+        // Capture a snapshot without alpha & cornerRadius.
         let oldCornerRadius = view.layer.cornerRadius
         let oldAlpha = view.alpha
         view.layer.cornerRadius = 0
         view.alpha = 1
         
         let snapshot: UIView
-        let snapshotType: MotionSnapshotType = self[view]?.snapshotType ?? .optimized
+        let snapshotType = self[view]?.snapshotType ?? MotionSnapshotType.optimized
         
         switch snapshotType {
         case .normal:
@@ -209,7 +209,7 @@ public extension MotionContext {
         
         case .noSnapshot:
             if view.superview != container {
-                if superviewToNoSnapshotSubviewMap[view.superview!] == nil {
+                if nil == superviewToNoSnapshotSubviewMap[view.superview!] {
                     superviewToNoSnapshotSubviewMap[view.superview!] = []
                 }
                 
@@ -222,20 +222,23 @@ public extension MotionContext {
             #if os(tvOS)
                 snapshot = view.snapshotView(afterScreenUpdates: true)!
             #else
+                
                 if #available(iOS 9.0, *), let stackView = view as? UIStackView {
                     snapshot = stackView.slowSnapshotView()
+                    
                 } else if let imageView = view as? UIImageView, view.subviews.isEmpty {
                     let contentView = UIImageView(image: imageView.image)
                     contentView.frame = imageView.bounds
                     contentView.contentMode = imageView.contentMode
                     contentView.tintColor = imageView.tintColor
                     contentView.backgroundColor = imageView.backgroundColor
+                    
                     let snapShotView = UIView()
                     snapShotView.addSubview(contentView)
                     snapshot = snapShotView
+                
                 } else if let barView = view as? UINavigationBar, barView.isTranslucent {
                     let newBarView = UINavigationBar(frame: barView.frame)
-                    
                     newBarView.barStyle = barView.barStyle
                     newBarView.tintColor = barView.tintColor
                     newBarView.barTintColor = barView.barTintColor
@@ -243,14 +246,17 @@ public extension MotionContext {
                     
                     // take a snapshot without the background
                     barView.layer.sublayers![0].opacity = 0
+                    
                     let realSnapshot = barView.snapshotView(afterScreenUpdates: true)!
                     barView.layer.sublayers![0].opacity = 1
                     
                     newBarView.addSubview(realSnapshot)
                     snapshot = newBarView
+                
                 } else if let effectView = view as? UIVisualEffectView {
                     snapshot = UIVisualEffectView(effect: effectView.effect)
                     snapshot.frame = effectView.bounds
+                
                 } else {
                     snapshot = view.snapshotView() ?? UIView()
                 }
@@ -272,10 +278,10 @@ public extension MotionContext {
         snapshot.layer.bounds = view.layer.bounds
         snapshot.motionIdentifier = view.motionIdentifier
         
-        if snapshotType != .noSnapshot {
+        if .noSnapshot != snapshotType {
             if !(view is UINavigationBar), let contentView = snapshot.subviews.get(0) {
-                // the Snapshot's contentView must have hold the cornerRadius value,
-                // since the snapshot might not have maskToBounds set
+                // The Snapshot's contentView must have hold the cornerRadius value,
+                // since the snapshot might not have maskToBounds set.
                 contentView.layer.cornerRadius = view.layer.cornerRadius
                 contentView.layer.masksToBounds = true
             }