update

.gitignore

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

FocusKit.podspec

+Pod::Spec.new do |s|
+  s.name = 'GK'
+  s.version = '3.15.0'
+  s.license = { :type => "AGPLv3+", :file => "LICENSE" }
+  s.summary = 'A powerful iOS / OSX framework for data-driven design.'
+  s.homepage = 'https://github.com/GraphKit/GraphKit'
+  s.social_media_url = 'https://www.facebook.com/graphkit'
+  s.authors = { 'GraphKit Inc.' => 'daniel@graphkit.io' }
+  s.source = { :git => 'https://github.com/GraphKit/GraphKit.git', :tag => s.version }
+  s.ios.deployment_target = '8.0'
+  s.osx.deployment_target = '10.10'
+  s.source_files = 'Source/*.swift'
+  s.requires_arc = true
+end
+

FocusKit.xcodeproj/project.pbxproj

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+}

LICENSE

+				GNU AFFERO GENERAL PUBLIC LICENSE
+					Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+Everyone is permitted to copy and distribute verbatim copies
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+
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+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+<one line to give the program's name and a brief idea of what it does.>
+Copyright (C) <year>  <name of author>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.

Source/Capture.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+import AVFoundation
+import AssetsLibrary
+
+@objc(CaptureDelegate)
+public protocol CaptureDelegate {
+	optional func captureDeviceConfigurationFailed(capture: Capture, error: NSError!)
+	optional func captureMediaCaptureFailed(capture: Capture, error: NSError!)
+	optional func captureAsetLibraryWriteFailed(capture: Capture, error: NSError!)
+	optional func capture(capture: Capture, assetLibraryDidWrite image: UIImage!)
+}
+
+public class Capture: NSObject, AVCaptureFileOutputRecordingDelegate {
+	/**
+	* activeVideoInput
+	* The video input that is currently active.
+	*/
+	private var activeVideoInput: AVCaptureDeviceInput?
+	
+	/**
+	* imageOutput
+	* When the session is taking a photo, this is the output manager.
+	*/
+	private lazy var imageOutput: AVCaptureStillImageOutput = AVCaptureStillImageOutput()
+	
+	/**
+	* movieOutput
+	* When the session is shooting a video, this is the output manager.
+	*/
+	private lazy var movieOutput: AVCaptureMovieFileOutput = AVCaptureMovieFileOutput()
+	
+	/**
+	* movieOutputURL
+	* The output URL of the movie file.
+	*/
+	private var movieOutputURL: NSURL?
+	
+	/**
+	* queue
+	* Async job queue.
+	*/
+	private lazy var queue: dispatch_queue_t = {
+		return dispatch_queue_create("io.graphkit.Capture", nil)
+	}()
+	
+	/**
+	* CaptureAdjustingExposureContext
+	* Used for KVO observation context.
+	*/
+	public var CaptureAdjustingExposureContext: NSString?
+	
+	/**
+	* cameraCount
+	* The number of available cameras on the device.
+	*/
+	public var cameraCount: Int {
+		return AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo).count
+	}
+	
+	/**
+	* session
+	* An AVCaptureSession that manages all inputs and outputs in that session.
+	*/
+	public lazy var session: AVCaptureSession = AVCaptureSession()
+	
+	/**
+	* delegate
+	* An optional instance of CaptureDelegate to handle events that are triggered during various
+	* stages in the session.
+	*/
+	public weak var delegate: CaptureDelegate?
+	
+	/**
+	* setupSession
+	* A helper method that prepares the session with the various available inputs and outputs.
+	* @param		preset: String, default: AVCaptureSessionPresetHigh
+	* @return		A boolean value, true if successful, false otherwise.
+	*/
+	public func setupSession(preset: String = AVCaptureSessionPresetHigh) -> Bool {
+		session.sessionPreset = preset
+		
+		var error: NSError?
+		
+		// setup default camera device
+		let videoDevice: AVCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
+		var videoInput: AVCaptureDeviceInput? = AVCaptureDeviceInput.deviceInputWithDevice(videoDevice, error: &error) as? AVCaptureDeviceInput
+		
+		if nil == videoInput {
+			return false
+		}
+		
+		if session.canAddInput(videoInput) {
+			session.addInput(videoInput)
+			activeVideoInput = videoInput
+		}
+		
+		let audioDevice: AVCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio)
+		var audioInput: AVCaptureDeviceInput? = AVCaptureDeviceInput.deviceInputWithDevice(audioDevice, error: &error) as? AVCaptureDeviceInput
+		
+		if nil == audioInput {
+			return false
+		}
+		
+		if session.canAddInput(audioInput) {
+			session.addInput(audioInput)
+		}
+		
+		imageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
+		
+		if session.canAddOutput(imageOutput) {
+			session.addOutput(imageOutput)
+		}
+		
+		if session.canAddOutput(movieOutput) {
+			session.addOutput(movieOutput)
+		}
+		
+		return true
+	}
+	
+	/**
+	* startSession
+	* Starts the capture session if it is not already running.
+	*/
+	public func startSession() {
+		if !session.running {
+			dispatch_async(queue) {
+				self.session.startRunning()
+			}
+		}
+	}
+	
+	/**
+	* stopSession
+	* Stops the capture session if it is already running.
+	*/
+	public func stopSession() {
+		if session.running {
+			dispatch_async(queue) {
+				self.session.stopRunning()
+			}
+		}
+	}
+	
+	/**
+	* cameraWithPosition
+	* @param		position: AVCaptureDevicePosition
+	* @return		An AVCaptureDevice optional.
+	*/
+	public func cameraWithPosition(position: AVCaptureDevicePosition) -> AVCaptureDevice? {
+		for device in AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo) {
+			if position == device.position {
+				return device as? AVCaptureDevice
+			}
+		}
+		return nil
+	}
+	
+	/**
+	* activeCamera
+	* @return		The active cameras video input device.
+	*/
+	public var activeCamera: AVCaptureDevice {
+		get {
+			return activeVideoInput!.device
+		}
+	}
+	
+	/**
+	* inactiveCamera
+	* @return		The inactive cameras video input device.
+	*/
+	public var inactiveCamera: AVCaptureDevice? {
+		get {
+			var device: AVCaptureDevice?
+			if 1 < cameraCount {
+				device = activeCamera.position == .Back ? cameraWithPosition(.Front) : cameraWithPosition(.Back)
+			}
+			return device
+		}
+	}
+	
+	/**
+	* canSwitchCameras
+	* Checks whether the camera can be switched. This would require at least two cameras.
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var canSwitchCameras: Bool {
+		return 1 < cameraCount
+	}
+	
+	/**
+	* switchCamera
+	* If it is possible to switch cameras, then the camera will be switched from the opposite facing camera.
+	* @return		A boolean of the result, true if switched, false otherwise.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public func switchCamera() -> Bool {
+		if !canSwitchCameras {
+			return false
+		}
+		
+		var error: NSError?
+		var videoDevice: AVCaptureDevice? = inactiveCamera
+		var videoInput: AVCaptureDeviceInput? = AVCaptureDeviceInput.deviceInputWithDevice(videoDevice, error: &error) as? AVCaptureDeviceInput
+		
+		if nil == videoInput {
+			session.beginConfiguration()
+			session.removeInput(activeVideoInput)
+			
+			if session.canAddInput(videoInput) {
+				activeVideoInput = videoInput
+			} else {
+				session.addInput(activeVideoInput)
+			}
+			
+			session.commitConfiguration()
+		} else {
+			delegate?.captureDeviceConfigurationFailed?(self, error: error)
+			return false
+		}
+		
+		return true
+	}
+	
+	/**
+	* cameraHasFlash
+	* Checks whether the camera supports flash.
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var cameraHasFlash: Bool {
+		return activeCamera.hasFlash
+	}
+	
+	/**
+	* flashMode
+	* A mutator and accessor for the flashMode property.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public var flashMode: AVCaptureFlashMode {
+		get {
+			return activeCamera.flashMode
+		}
+		set(value) {
+			let device: AVCaptureDevice = activeCamera
+			if flashMode != device.flashMode && device.isFlashModeSupported(flashMode) {
+				var error: NSError?
+				if device.lockForConfiguration(&error) {
+					device.flashMode = flashMode
+					device.unlockForConfiguration()
+				} else {
+					delegate?.captureDeviceConfigurationFailed?(self, error: error)
+				}
+			}
+		}
+	}
+	
+	/**
+	* cameraHasTorch
+	* Checks whether the device supports torch feature. 
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var cameraHasTorch: Bool {
+		get {
+			return activeCamera.hasTorch
+		}
+	}
+	
+	/**
+	* torchMode
+	* A mutator and accessor for the torchMode property.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public var torchMode: AVCaptureTorchMode {
+		get {
+			return activeCamera.torchMode
+		}
+		set(value) {
+			let device: AVCaptureDevice = activeCamera
+			if torchMode != device.torchMode && device.isTorchModeSupported(torchMode) {
+				var error: NSError?
+				if device.lockForConfiguration(&error) {
+					device.torchMode = torchMode
+					device.unlockForConfiguration()
+				} else {
+					delegate?.captureDeviceConfigurationFailed?(self, error: error)
+				}
+			}
+		}
+	}
+	
+	/**
+	* cameraSupportsTapToFocus
+	* Checks whether the device supports tap to focus.
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var cameraSupportsTapToFocus: Bool {
+		get {
+			return activeCamera.focusPointOfInterestSupported
+		}
+	}
+	
+	/**
+	* focusAtpoint
+	* Sets the point to focus at on the screen.
+	* @param		point: CGPoint
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public func focusAtPoint(point: CGPoint) {
+		let device: AVCaptureDevice = activeCamera
+		if device.focusPointOfInterestSupported && device.isFocusModeSupported(.AutoFocus) {
+			var error: NSError?
+			if device.lockForConfiguration(&error) {
+				device.focusPointOfInterest = point
+				device.focusMode = .AutoFocus
+				device.unlockForConfiguration()
+			} else {
+				delegate?.captureDeviceConfigurationFailed?(self, error: error)
+			}
+		}
+	}
+	
+	/**
+	* cameraSupportsTapToExpose
+	* Checks whether the device supports tap to expose.
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var cameraSupportsTapToExpose: Bool {
+		get {
+			return activeCamera.exposurePointOfInterestSupported
+		}
+	}
+	
+	/**
+	* exposeAtPoint
+	* Sets a point for exposure.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public func exposeAtPoint(point: CGPoint) {
+		let device: AVCaptureDevice = activeCamera
+		var exposureMode: AVCaptureExposureMode = .ContinuousAutoExposure
+		
+		if device.exposurePointOfInterestSupported && device.isExposureModeSupported(exposureMode) {
+			var error: NSError?
+			if device.lockForConfiguration(&error) {
+				device.exposurePointOfInterest = point
+				device.exposureMode = exposureMode
+				
+				if device.isExposureModeSupported(.Locked) {
+					device.addObserver(self, forKeyPath: "adjustingExposure", options: .New, context: &CaptureAdjustingExposureContext)
+				}
+				device.unlockForConfiguration()
+			} else {
+				delegate?.captureDeviceConfigurationFailed?(self, error: error)
+			}
+		}
+	}
+	
+	/**
+	* override to set observeValueForKeyPath and handle exposure observance.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	override public func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
+		if context == &CaptureAdjustingExposureContext {
+			let device: AVCaptureDevice = object as! AVCaptureDevice
+			
+			if device.adjustingExposure && device.isExposureModeSupported(.Locked) {
+				object.removeObserver(self, forKeyPath: "adjustingExposure", context: &CaptureAdjustingExposureContext)
+				dispatch_async(queue) {
+					var error: NSError?
+					if device.lockForConfiguration(&error) {
+						device.unlockForConfiguration()
+					} else {
+						self.delegate?.captureDeviceConfigurationFailed?(self, error: error)
+					}
+				}
+			} else {
+				super.observeValueForKeyPath(keyPath, ofObject: object, change: change, context: context)
+			}
+		}
+	}
+	
+	/**
+	* resetFocusAndExposureModes
+	* Resets to default configuration for device focus and exposure mode.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public func resetFocusAndExposureModes() {
+		let device: AVCaptureDevice = activeCamera
+		
+		var exposureMode: AVCaptureExposureMode = .ContinuousAutoExposure
+		let canResetExposure: Bool = device.focusPointOfInterestSupported && device.isExposureModeSupported(exposureMode)
+		
+		var focusMode: AVCaptureFocusMode = .ContinuousAutoFocus
+		let canResetFocus: Bool = device.focusPointOfInterestSupported && device.isFocusModeSupported(focusMode)
+		
+		let centerPoint: CGPoint = CGPointMake(0.5, 0.5)
+		
+		var error: NSError?
+		if device.lockForConfiguration(&error) {
+			if canResetFocus {
+				device.focusMode = focusMode
+				device.focusPointOfInterest = centerPoint
+			}
+			if canResetExposure {
+				device.exposureMode = exposureMode
+				device.exposurePointOfInterest = centerPoint
+			}
+			device.unlockForConfiguration()
+		} else {
+			delegate?.captureDeviceConfigurationFailed?(self, error: error)
+		}
+	}
+	
+	/**
+	* captureStillImage
+	* Captures the image and write the photo to the user's asset library.
+	* @delegate		If the success, the capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) is called.
+	* @delegate		If failure, capture(capture: Capture!, assetLibraryWriteFailed error: NSError!) is called.
+	*/
+	public func captureStillImage() {
+		var connection: AVCaptureConnection = imageOutput.connectionWithMediaType(AVMediaTypeVideo)
+		if connection.supportsVideoOrientation {
+			connection.videoOrientation = currentVideoOrientation
+		}
+		imageOutput.captureStillImageAsynchronouslyFromConnection(connection) { (sampleBuffer: CMSampleBufferRef?, error: NSError?) in
+			if nil == sampleBuffer {
+				self.delegate?.captureAsetLibraryWriteFailed?(self, error: error)
+			} else {
+				let imageData: NSData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
+				let image: UIImage = UIImage(data: imageData)!
+				self.writeImageToAssetsLibrary(image)
+			}
+		}
+	}
+	
+	/**
+	* isRecording
+	* Checkts whether the device is currently recording. 
+	* @return		A boolean of the result, true if yes, false otherwise.
+	*/
+	public var isRecording: Bool {
+		get {
+			return movieOutput.recording
+		}
+	}
+	
+	/**
+	* startRecording
+	* If the device is not currently recording, this starts the movie recording.
+	* @delegate		If the configuration fails, the capture(capture: Capture!, deviceConfigurationFailed error: NSError!) is called.
+	*/
+	public func startRecording() {
+		if !isRecording {
+			let connection: AVCaptureConnection = movieOutput.connectionWithMediaType(AVMediaTypeVideo)
+			if connection.supportsVideoOrientation {
+				connection.videoOrientation = currentVideoOrientation
+			}
+			if connection.supportsVideoStabilization {
+				connection.preferredVideoStabilizationMode = .Auto
+			}
+			
+			let device: AVCaptureDevice = activeCamera
+			
+			if device.smoothAutoFocusSupported {
+				var error: NSError?
+				if device.lockForConfiguration(&error) {
+					device.smoothAutoFocusEnabled = false
+					device.unlockForConfiguration()
+				} else {
+					delegate?.captureDeviceConfigurationFailed?(self, error: error)
+				}
+			}
+			movieOutputURL = uniqueURL
+			movieOutput.startRecordingToOutputFileURL(movieOutputURL, recordingDelegate: self)
+		}
+	}
+	
+	/**
+	* stopRecording
+	* If the device is currently recoring, this stops the movie recording.
+	*/
+	public func stopRecording() {
+		if isRecording {
+			movieOutput.stopRecording()
+		}
+	}
+	
+	/**
+	* recordedDuration
+	* Retrieves the movie recorded duration.
+	* @return		A CMTime value.
+	*/
+	public var recordedDuration: CMTime {
+		get {
+			return movieOutput.recordedDuration
+		}
+	}
+	
+	/**
+	* currentVideoOrientation
+	* Retrieves the current orientation of the device.
+	* @return		A AVCaptureVideoOrientation value, [Portrait, LandscapeLeft, PortraitUpsideDown, LandscapeRight].
+	*/
+	public var currentVideoOrientation: AVCaptureVideoOrientation {
+		var orientation: AVCaptureVideoOrientation?
+		switch UIDevice.currentDevice().orientation {
+		case .Portrait:
+			orientation = .Portrait
+			break
+		case .LandscapeRight:
+			orientation = .LandscapeLeft
+			break
+		case .PortraitUpsideDown:
+			orientation = .PortraitUpsideDown
+			break
+		default:
+			orientation = .LandscapeRight
+		}
+		return orientation!
+	}
+	
+	/**
+	* uniqueURL
+	* A unique URL generated for the movie video.
+	* @return		An optional NSURL value.
+	*/
+	private var uniqueURL: NSURL? {
+		var error: NSError?
+		let fileManager: NSFileManager = NSFileManager.defaultManager()
+		let tempDirectoryTemplate: String = NSTemporaryDirectory().stringByAppendingPathComponent("FocusLibrary")
+		if fileManager.createDirectoryAtPath(tempDirectoryTemplate, withIntermediateDirectories: true, attributes: nil, error: &error) {
+			return NSURL.fileURLWithPath(tempDirectoryTemplate + "/test.mov")
+		}
+		return nil
+	}
+	
+	/**
+	* postAssetLibraryNotification
+	* Fires an asynchronous call to the capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	* @param		image: UIImage!
+	* @delegate		An asynchronous call to capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	*/
+	private func postAssetLibraryNotification(image: UIImage!) {
+		dispatch_async(queue) {
+			self.delegate?.capture?(self, assetLibraryDidWrite: image)
+		}
+	}
+	
+	/**
+	* writeImageToAssetsLibrary
+	* Writes the image file to the user's asset library.
+	* @param		image: UIImage!
+	* @delegate		If successful, an asynchronous call to capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	* @delegate		If failure, capture(capture: Capture!, assetLibraryWriteFailed error: NSError!) is called.
+	*/
+	private func writeImageToAssetsLibrary(image: UIImage) {
+		let library: ALAssetsLibrary = ALAssetsLibrary()
+		library.writeImageToSavedPhotosAlbum(image.CGImage, orientation: ALAssetOrientation(rawValue: image.imageOrientation.rawValue)!) { (path: NSURL!, error: NSError?) -> Void in
+			if nil == error {
+				self.postAssetLibraryNotification(image)
+			} else {
+				self.delegate?.captureAsetLibraryWriteFailed?(self, error: error)
+			}
+		}
+	}
+	
+	/**
+	* writeVideoToAssetsLibrary
+	* Writes the video file to the user's asset library.
+	* @param		videoURL: NSURL!
+	* @delegate		If successful, an asynchronous call to capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	* @delegate		If failure, capture(capture: Capture!, assetLibraryWriteFailed error: NSError!) is called.
+	*/
+	private func writeVideoToAssetsLibrary(videoURL: NSURL!) {
+		let library: ALAssetsLibrary = ALAssetsLibrary()
+		if library.videoAtPathIsCompatibleWithSavedPhotosAlbum(videoURL) {
+			library.writeVideoAtPathToSavedPhotosAlbum(videoURL) { (path: NSURL!, error: NSError?) in
+				if nil == error {
+					self.generateThumbnailForVideoAtURL(videoURL)
+				} else {
+					self.delegate?.captureAsetLibraryWriteFailed?(self, error: error)
+				}
+			}
+		}
+	}
+	
+	/**
+	* generateThumbnailForVideoAtURL
+	* Generates a thumbnail for the video URL specified.
+	* @param		videoURL: NSURL!
+	* @delegate		An asynchronous call to capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	*/
+	private func generateThumbnailForVideoAtURL(videoURL: NSURL!) {
+		dispatch_async(queue) {
+			let asset: AVAsset = AVAsset.assetWithURL(videoURL) as! AVAsset
+			let imageGenerator: AVAssetImageGenerator = AVAssetImageGenerator(asset: asset)
+			imageGenerator.maximumSize = CGSizeMake(100, 0)
+			imageGenerator.appliesPreferredTrackTransform = true
+			
+			let imageRef: CGImageRef = imageGenerator.copyCGImageAtTime(kCMTimeZero, actualTime: nil, error: nil)
+			let image: UIImage = UIImage(CGImage: imageRef)!
+			
+			dispatch_async(dispatch_get_main_queue()) {
+				self.postAssetLibraryNotification(image)
+			}
+		}
+	}
+	
+	/**
+	* delegate method for capturing video file.
+	* @delegate		If successful, an asynchronous call to capture(capture: Capture!, assetLibraryDidWrite image: UIImage!) delegate.
+	* @delegate		If failure, capture(capture: Capture!, mediaCaptureFailed error: NSError!) is called.
+	*/
+	public func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {
+		if nil == error {
+			writeVideoToAssetsLibrary(movieOutputURL!.copy() as! NSURL)
+		} else {
+			delegate?.captureMediaCaptureFailed?(self, error: error)
+		}
+		movieOutputURL = nil
+	}
+}
\ No newline at end of file

Source/CapturePreview.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+import AVFoundation
+
+@objc(PreviewDelegate)
+public protocol PreviewDelegate {
+	optional func preview(preview: Preview!, tappedToFocusAt point: CGPoint)
+	optional func preview(preview: Preview!, tappedToExposeAt point: CGPoint)
+	optional func preview(preview: Preview!, tappedToReset focus: UIView!, exposure: UIView!)
+}
+
+public class Preview: UIView {
+	/**
+	* boxBounds
+	* A static property that sets the initial size of the focusBox and exposureBox properties.
+	*/
+	static public var boxBounds: CGRect = CGRectMake(0, 0, 150, 150)
+	
+	/**
+	* delegate
+	* An optional instance of PreviewDelegate to handle events that are triggered during various
+	* stages of engagement.
+	*/
+	public weak var delegate: PreviewDelegate?
+	
+	/**
+	* tapToFocusEnabled
+	* A mutator and accessor that enables and disables tap to focus gesture.
+	*/
+	public var tapToFocusEnabled: Bool {
+		get {
+			return singleTapRecognizer!.enabled
+		}
+		set(value) {
+			singleTapRecognizer!.enabled = value
+		}
+	}
+	
+	/**
+	* tapToExposeEnabled
+	* A mutator and accessor that enables and disables tap to expose gesture.
+	*/
+	public var tapToExposeEnabled: Bool {
+		get {
+			return doubleTapRecognizer!.enabled
+		}
+		set(value) {
+			doubleTapRecognizer!.enabled = value
+		}
+	}
+	
+	/**
+	* override for layerClass
+	*/
+	override public class func layerClass() -> AnyClass {
+		return AVCaptureVideoPreviewLayer.self
+	}
+	
+	/**
+	* session
+	* A mutator and accessor for the preview AVCaptureSession value.
+	*/
+	public var session: AVCaptureSession {
+		get {
+			return (layer as! AVCaptureVideoPreviewLayer).session
+		}
+		set(value) {
+			(layer as! AVCaptureVideoPreviewLayer).session = value
+		}
+	}
+	
+	/**
+	* focusBox
+	* An optional UIView for the focusBox animation. This is used when the 
+	* tapToFocusEnabled property is set to true.
+	*/
+	public var focusBox: UIView?
+	
+	/**
+	* exposureBox
+	* An optional UIView for the exposureBox animation. This is used when the
+	* tapToExposeEnabled property is set to true.
+	*/
+	public var exposureBox: UIView?
+	
+	/**
+	* singleTapRecognizer
+	* Gesture recognizer for single tap.
+	*/
+	private var singleTapRecognizer: UITapGestureRecognizer?
+	
+	/**
+	* doubleTapRecognizer
+	* Gesture recognizer for double tap.
+	*/
+	private var doubleTapRecognizer: UITapGestureRecognizer?
+	
+	/**
+	* doubleDoubleTapRecognizer
+	* Gesture recognizer for double/double tap.
+	*/
+	private var doubleDoubleTapRecognizer: UITapGestureRecognizer?
+	
+	required public init(coder aDecoder: NSCoder) {
+		super.init(coder: aDecoder)
+		setupView()
+	}
+	
+	override public init(frame: CGRect) {
+		super.init(frame: frame)
+		setupView()
+	}
+	
+	public init() {
+		super.init(frame: CGRectZero)
+		setTranslatesAutoresizingMaskIntoConstraints(false)
+		setupView()
+	}
+	
+	/**
+	* handleSingleTap
+	* @param		recognizer: UIGestureRecognizer
+	* @delegate		Calls preview(preview: Preview!, tappedToFocusAt point: CGPoint)
+	*/
+	internal func handleSingleTap(recognizer: UIGestureRecognizer) {
+		let point: CGPoint = recognizer.locationInView(self)
+		runBoxAnimationOnView(focusBox, point: point)
+		delegate?.preview?(self, tappedToFocusAt: captureDevicePointForPoint(point))
+	}
+	
+	/**
+	* handleDoubleTap
+	* @param		recognizer: UIGestureRecognizer
+	* @delegate		Calls preview(preview: Preview!, tappedToExposeAt point: CGPoint)
+	*/
+	internal func handleDoubleTap(recognizer: UIGestureRecognizer) {
+		let point: CGPoint = recognizer.locationInView(self)
+		runBoxAnimationOnView(exposureBox, point: point)
+		delegate?.preview?(self, tappedToExposeAt: captureDevicePointForPoint(point))
+	}
+	
+	/**
+	* handleDoubleDoubleTap
+	* @param		recognizer: UIGestureRecognizer
+	*/
+	internal func handleDoubleDoubleTap(recognizer: UIGestureRecognizer) {
+		runResetAnimation()
+	}
+	
+	/**
+	* setupView
+	* Common setup for view.
+	*/
+	private func setupView() {
+		let captureLayer: AVCaptureVideoPreviewLayer = layer as! AVCaptureVideoPreviewLayer
+		captureLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
+		
+		singleTapRecognizer = UITapGestureRecognizer(target: self, action: "handleSingleTap:")
+		singleTapRecognizer!.numberOfTapsRequired = 1
+		
+		doubleTapRecognizer = UITapGestureRecognizer(target: self, action: "handleDoubleTap:")
+		doubleTapRecognizer!.numberOfTapsRequired = 2
+		
+		doubleDoubleTapRecognizer = UITapGestureRecognizer(target: self, action: "handleDoubleDoubleTap:")
+		doubleDoubleTapRecognizer!.numberOfTapsRequired = 2
+		doubleDoubleTapRecognizer!.numberOfTouchesRequired = 2
+		
+		addGestureRecognizer(singleTapRecognizer!)
+		addGestureRecognizer(doubleTapRecognizer!)
+		addGestureRecognizer(doubleDoubleTapRecognizer!)
+		singleTapRecognizer!.requireGestureRecognizerToFail(doubleTapRecognizer!)
+		
+		focusBox = viewWithColor(.redColor())
+		exposureBox = viewWithColor(.blueColor())
+		addSubview(focusBox!)
+		addSubview(exposureBox!)
+	}
+	
+	/**
+	* viewWithColor
+	* Initializes a UIView with a set UIColor.
+	* @param		color: UIColor
+	* @return		Initialized UIView
+	*/
+	private func viewWithColor(color: UIColor) -> UIView {
+		let view: UIView = UIView(frame: Preview.boxBounds)
+		view.backgroundColor = .clearColor()
+		view.layer.borderColor = color.CGColor
+		view.layer.borderWidth = 5
+		view.hidden = true
+		return view
+	}
+	
+	/**
+	* runBoxAnimationOnView
+	* Runs the animation used for focusBox and exposureBox on single and double
+	* taps respectively at a given point.
+	* @param		view: UIView!
+	* @param		point: CGPoint
+	*/
+	private func runBoxAnimationOnView(view: UIView!, point: CGPoint) {
+		view.center = point
+		view.hidden = false
+		UIView.animateWithDuration(0.15, delay: 0, options: .CurveEaseInOut, animations: { _ in
+			view.layer.transform = CATransform3DMakeScale(0.5, 0.5, 1.0)
+		}) { _ in
+			let delayInSeconds: Double = 0.5
+			let popTime: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(delayInSeconds * Double(NSEC_PER_SEC)))
+			dispatch_after(popTime, dispatch_get_main_queue()) {
+				view.hidden = true
+				view.transform = CGAffineTransformIdentity
+			}
+		}
+	}
+	
+	/**
+	* captureDevicePointForPoint
+	* Interprets the correct point from touch to preview layer.
+	* @param		point: CGPoint
+	* @return		A translated CGPoint value.
+	*/
+	private func captureDevicePointForPoint(point: CGPoint) -> CGPoint {
+		let previewLayer: AVCaptureVideoPreviewLayer = layer as! AVCaptureVideoPreviewLayer
+		return previewLayer.captureDevicePointOfInterestForPoint(point)
+	}
+	
+	/**
+	* runResetAnimation
+	* Executes the reset animation for focus and exposure.
+	* @delegate		Calls preview(preview: Preview!, tappedToReset focus: UIView!, exposure: UIView!)
+	*/
+	private func runResetAnimation() {
+		if !tapToFocusEnabled && !tapToExposeEnabled {
+			return
+		}
+		
+		let previewLayer: AVCaptureVideoPreviewLayer = layer as! AVCaptureVideoPreviewLayer
+		let centerPoint: CGPoint = previewLayer.pointForCaptureDevicePointOfInterest(CGPointMake(0.5, 0.5))
+		focusBox!.center = centerPoint
+		exposureBox!.center = centerPoint
+		exposureBox!.transform = CGAffineTransformMakeScale(1.2, 1.2)
+		focusBox!.hidden = false
+		exposureBox!.hidden = false
+		
+		UIView.animateWithDuration(0.15, delay: 0, options: .CurveEaseInOut, animations: { _ in
+			self.focusBox!.layer.transform = CATransform3DMakeScale(0.5, 0.5, 1.0)
+			self.exposureBox!.layer.transform = CATransform3DMakeScale(0.7, 0.7, 1.0)
+		}) { _ in
+			let delayInSeconds: Double = 0.5
+			let popTime: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(delayInSeconds * Double(NSEC_PER_SEC)))
+			dispatch_after(popTime, dispatch_get_main_queue()) {
+				self.focusBox!.hidden = true
+				self.exposureBox!.hidden = true
+				self.focusBox!.transform = CGAffineTransformIdentity
+				self.exposureBox!.transform = CGAffineTransformIdentity
+				self.delegate?.preview?(self, tappedToReset: self.focusBox!, exposure: self.exposureBox!)
+			}
+		}
+	}
+}

Source/FabButton.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+class FabButton : UIButton {
+    
+    var lineWidth: CGFloat = 2.0
+    
+    var color: UIColor?
+    var pulseColor: UIColor?
+    
+    private var vLine: UIView?
+    private var hLine: UIView?
+    private var backgroundColorView: UIView?
+    private var pulseView: UIView?
+    
+    override func drawRect(rect: CGRect) {
+        setupContext(rect)
+        setupBackgroundColorView()
+        setupPlus()
+    }
+    
+    required init(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        initialize()
+        applyShadow()
+    }
+    
+    required override init(frame: CGRect) {
+        super.init(frame: frame)
+        initialize()
+        applyShadow()
+    }
+    
+    func initialize() {
+        color = UIColor.redColor()
+        pulseColor = UIColor.whiteColor()
+        setTranslatesAutoresizingMaskIntoConstraints(false)
+    }
+    
+    func setupContext(rect: CGRect) {
+        let context = UIGraphicsGetCurrentContext()
+        CGContextSaveGState(context);
+        CGContextAddEllipseInRect(context, rect)
+        CGContextSetFillColorWithColor(context, UIColor.clearColor().CGColor)
+        CGContextFillPath(context)
+        CGContextRestoreGState(context);
+    }
+    
+    // We need this view so we can use the masksToBounds
+    // so the pulse doesn't animate off the button
+    func setupBackgroundColorView() {
+        backgroundColorView = UIView()
+        backgroundColorView!.frame = self.bounds
+        backgroundColorView!.layer.cornerRadius = boundsW() / 2.0
+        backgroundColorView!.backgroundColor = color
+        backgroundColorView!.layer.masksToBounds = true
+        self.insertSubview(backgroundColorView!, atIndex: 0)
+    }
+    
+    // I make the + with two views because
+    // The label is not actually vertically and horizontally aligned
+    // Quick hack instead of subclassing UILabel and override drawTextInRect
+    func setupPlus() {
+        setupVerticalLine()
+        setupHorizontalLine()
+    }
+    
+    func setupVerticalLine() {
+        vLine = UIView(frame: CGRectMake(0, 0, lineWidth, CGRectGetHeight(backgroundColorView!.frame) / 3.0))
+        vLine!.backgroundColor = UIColor.whiteColor()
+        vLine!.center = backgroundColorView!.center
+        backgroundColorView!.addSubview(vLine!)
+    }
+    
+    func setupHorizontalLine() {
+        hLine = UIView(frame: CGRectMake(0, 0, CGRectGetWidth(backgroundColorView!.frame) / 3.0, lineWidth))
+        hLine!.backgroundColor = UIColor.whiteColor()
+        hLine!.center = backgroundColorView!.center
+        backgroundColorView!.addSubview(hLine!)
+    }
+    
+    func applyShadow() {
+        layer.shadowOffset = CGSizeMake(1, 1)
+        layer.shadowColor = UIColor.blackColor().CGColor
+        layer.shadowOpacity = 0.5
+        layer.shadowRadius = 5
+    }
+    
+    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
+        pulseTouches(touches)
+    }
+    
+    override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
+        shrink()
+        removePulse()
+    }
+    
+    func pulseTouches(touches: NSSet) {
+        let touch = touches.allObjects.last as! UITouch
+        let touchLocation = touch.locationInView(self)
+        pulseView = UIView()
+        pulseView!.frame = CGRectMake(0, 0, boundsW(), boundsH())
+        pulseView!.layer.cornerRadius = boundsW() / 2.0
+        pulseView!.center = touchLocation
+        pulseView!.backgroundColor = pulseColor!.colorWithAlphaComponent(0.5)
+        backgroundColorView!.addSubview(pulseView!)
+        UIView.animateWithDuration(0.3, animations: {
+           self.pulseView!.transform = CGAffineTransformMakeScale(3, 3)
+           self.transform = CGAffineTransformMakeScale(1.1, 1.1)
+        }, completion: nil)
+    }
+    
+    func shrink() {
+        UIView.animateWithDuration(0.3, delay: 0.0, usingSpringWithDamping: 0.2, initialSpringVelocity: 10, options: nil, animations: {
+            self.transform = CGAffineTransformIdentity
+        }, completion: nil)
+    }
+    
+    func removePulse() {
+        UIView.animateWithDuration(0.3, animations: { () -> Void in
+            self.pulseView?.alpha = 0.0
+        }) { (finished) -> Void in
+            self.pulseView?.removeFromSuperview()
+            self.pulseView = nil
+        }
+    }
+}

Source/FlatButton.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+class FlatButton : UIButton {
+    
+    var textColor: UIColor?
+    var pulseColor: UIColor?
+    
+    private var vLine: UIView = UIView()
+    private var hLine: UIView = UIView()
+    private var backgroundColorView: UIView = UIView()
+    private var pulseView: UIView?
+    
+    override func drawRect(rect: CGRect) {
+        setupContext(rect)
+        setupBackgroundColorView()
+    }
+    
+    required init(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        initialize()
+        applyShadow()
+    }
+    
+    required override init(frame: CGRect) {
+        super.init(frame: frame)
+        initialize()
+        applyShadow()
+    }
+    
+    func initialize() {
+        pulseColor = UIColor.whiteColor()
+        setTranslatesAutoresizingMaskIntoConstraints(false)
+    }
+    
+    func setupContext(rect: CGRect) {
+        let context = UIGraphicsGetCurrentContext()
+        CGContextSaveGState(context);
+        CGContextSetFillColorWithColor(context, UIColor.clearColor().CGColor)
+        CGContextFillPath(context)
+        CGContextRestoreGState(context);
+    }
+    
+    // We need this view so we can use the masksToBounds
+    // so the pulse doesn't animate off the button
+    func setupBackgroundColorView() {
+        backgroundColorView.frame = self.bounds
+        backgroundColorView.layer.cornerRadius = 3.0
+        backgroundColorView.backgroundColor = UIColor.clearColor()
+        backgroundColorView.layer.masksToBounds = true
+        self.insertSubview(backgroundColorView, atIndex: 0)
+    }
+    
+    func applyShadow() {
+        layer.shadowOffset = CGSizeMake(1, 1)
+        layer.shadowColor = UIColor.blackColor().CGColor
+        layer.shadowOpacity = 0.5
+        layer.shadowRadius = 5
+    }
+    
+    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
+        pulseTouches(touches)
+    }
+    
+    override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
+        shrink()
+        removePulse()
+    }
+    
+    func pulseTouches(touches: NSSet) {
+        let touch = touches.allObjects.last as! UITouch
+        let touchLocation = touch.locationInView(self)
+        pulseView = UIView()
+        pulseView!.frame = CGRectMake(0, 0, self.bounds.size.height, self.bounds.size.height)
+        pulseView!.layer.cornerRadius = boundsH() / 2.0
+        pulseView!.center = touchLocation
+        pulseView!.backgroundColor = pulseColor!.colorWithAlphaComponent(0.5)
+        backgroundColorView.addSubview(pulseView!)
+        textColor = self.titleLabel?.textColor
+        UIView.animateWithDuration(0.3, animations: {
+            self.pulseView!.transform = CGAffineTransformMakeScale(10, 10)
+            self.transform = CGAffineTransformMakeScale(1.05, 1.1)
+            self.setTitleColor(UIColor.whiteColor(), forState: .Normal)
+            }, completion: nil)
+    }
+    
+    func shrink() {
+        UIView.animateWithDuration(0.3, delay: 0.0, usingSpringWithDamping: 0.2, initialSpringVelocity: 10, options: nil, animations: {
+            self.transform = CGAffineTransformIdentity
+            }, completion: nil)
+    }
+    
+    func removePulse() {
+        UIView.animateWithDuration(0.3, animations: { () -> Void in
+            self.pulseView!.alpha = 0.0
+            self.setTitleColor(self.textColor, forState: .Normal)
+            }) { (finished) -> Void in
+            self.pulseView!.removeFromSuperview()
+            self.pulseView = nil
+        }
+    }
+}

Source/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>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>io.graphkit.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

Source/LICENSE

+				GNU AFFERO GENERAL PUBLIC LICENSE
+					Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+Preamble
+
+The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
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+
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Source/MaterialKit+UIView.swift

+//
+// Copyright (C) 2015 Adam Dahan <https://github.com/adamdahan>.
+// Copyright (C) 2015 Daniel Dahan <https://github.com/danieldahan>.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+extension UIView {
+	
+	func frameW() -> CGFloat {
+		return self.frame.size.width
+	}
+	
+	func frameH() -> CGFloat {
+		return self.frame.size.height
+	}
+	
+	func frameX() -> CGFloat {
+		return self.frame.origin.x
+	}
+	
+	func frameY() -> CGFloat {
+		return self.frame.origin.y
+	}
+	
+	func boundsW() -> CGFloat {
+		return self.bounds.size.width
+	}
+	
+	func boundsH() -> CGFloat {
+		return self.bounds.size.height
+	}
+	
+	func boundsX() -> CGFloat {
+		return self.bounds.origin.x
+	}
+	
+	func boundsY() -> CGFloat {
+		return self.bounds.origin.y
+	}
+	
+}

Source/RaisedButton.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+class RaisedButton : UIButton {
+	
+	var color: UIColor?
+	var pulseColor: UIColor?
+	
+	private var vLine: UIView = UIView()
+	private var hLine: UIView = UIView()
+	private var backgroundColorView: UIView = UIView()
+	private var pulseView: UIView?
+	
+	override func drawRect(rect: CGRect) {
+		setupContext(rect)
+		setupBackgroundColorView()
+	}
+	
+	required init(coder aDecoder: NSCoder) {
+		super.init(coder: aDecoder)
+		initialize()
+		applyShadow()
+	}
+	
+	required override init(frame: CGRect) {
+		super.init(frame: frame)
+		initialize()
+		applyShadow()
+	}
+	
+	func initialize() {
+		color = UIColor.redColor()
+		pulseColor = UIColor.whiteColor()
+		setTranslatesAutoresizingMaskIntoConstraints(false)
+	}
+	
+	func setupContext(rect: CGRect) {
+		let context = UIGraphicsGetCurrentContext()
+		CGContextSaveGState(context);
+		CGContextSetFillColorWithColor(context, UIColor.clearColor().CGColor)
+		CGContextFillPath(context)
+		CGContextRestoreGState(context);
+	}
+	
+	// We need this view so we can use the masksToBounds
+	// so the pulse doesn't animate off the button
+	func setupBackgroundColorView() {
+		backgroundColorView.frame = self.bounds
+		backgroundColorView.layer.cornerRadius = 3.0
+		backgroundColorView.backgroundColor = color
+		backgroundColorView.layer.masksToBounds = true
+		self.insertSubview(backgroundColorView, atIndex: 0)
+	}
+	
+	func applyShadow() {
+		layer.shadowOffset = CGSizeMake(1, 1)
+		layer.shadowColor = UIColor.blackColor().CGColor
+		layer.shadowOpacity = 0.5
+		layer.shadowRadius = 5
+	}
+	
+	override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
+		pulseTouches(touches)
+	}
+	
+	override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
+		shrink()
+		removePulse()
+	}
+	
+	func pulseTouches(touches: NSSet) {
+		let touch = touches.allObjects.last as! UITouch
+		let touchLocation = touch.locationInView(self)
+		pulseView = UIView()
+		pulseView!.frame = CGRectMake(0, 0, self.bounds.size.height, self.bounds.size.height)
+		pulseView!.layer.cornerRadius = boundsH() / 2.0
+		pulseView!.center = touchLocation
+		pulseView!.backgroundColor = pulseColor!.colorWithAlphaComponent(0.5)
+		backgroundColorView.addSubview(pulseView!)
+		UIView.animateWithDuration(0.3, animations: {
+			self.pulseView!.transform = CGAffineTransformMakeScale(10, 10)
+			self.transform = CGAffineTransformMakeScale(1.05, 1.1)
+			}, completion: nil)
+	}
+	
+	func shrink() {
+		UIView.animateWithDuration(0.3, delay: 0.0, usingSpringWithDamping: 0.2, initialSpringVelocity: 10, options: nil, animations: {
+			self.transform = CGAffineTransformIdentity
+			}, completion: nil)
+	}
+	
+	func removePulse() {
+		UIView.animateWithDuration(0.3, animations: { () -> Void in
+			self.pulseView!.alpha = 0.0
+			}) { (finished) -> Void in
+				self.pulseView!.removeFromSuperview()
+				self.pulseView = nil
+		}
+	}
+}
+

Source/Text.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+@objc(TextDelegate)
+public protocol TextDelegate {
+	optional func textStorageWillProcessEdit(text: Text!, textStorage: TextStorage!, string: String!, range: NSRange)
+	optional func textStorageDidProcessEdit(text: Text!, textStorage: TextStorage!, string: String!, result: NSTextCheckingResult!, flags: NSMatchingFlags, stop: UnsafeMutablePointer<ObjCBool>)
+}
+
+public class Text: NSObject {
+	/**
+	* searchPattern
+	* A string representation of the regular expression that matches text within
+	* the TextStorage string property. By default, the search pattern recognizes
+	* words and emoji characters beginning with hashtags.
+	*/
+	public var searchPattern: String = "(^|\\s)#[\\d\\w_\u{203C}\u{2049}\u{20E3}\u{2122}\u{2139}\u{2194}-\u{2199}\u{21A9}-\u{21AA}\u{231A}-\u{231B}\u{23E9}-\u{23EC}\u{23F0}\u{23F3}\u{24C2}\u{25AA}-\u{25AB}\u{25B6}\u{25C0}\u{25FB}-\u{25FE}\u{2600}-\u{2601}\u{260E}\u{2611}\u{2614}-\u{2615}\u{261D}\u{263A}\u{2648}-\u{2653}\u{2660}\u{2663}\u{2665}-\u{2666}\u{2668}\u{267B}\u{267F}\u{2693}\u{26A0}-\u{26A1}\u{26AA}-\u{26AB}\u{26BD}-\u{26BE}\u{26C4}-\u{26C5}\u{26CE}\u{26D4}\u{26EA}\u{26F2}-\u{26F3}\u{26F5}\u{26FA}\u{26FD}\u{2702}\u{2705}\u{2708}-\u{270C}\u{270F}\u{2712}\u{2714}\u{2716}\u{2728}\u{2733}-\u{2734}\u{2744}\u{2747}\u{274C}\u{274E}\u{2753}-\u{2755}\u{2757}\u{2764}\u{2795}-\u{2797}\u{27A1}\u{27B0}\u{2934}-\u{2935}\u{2B05}-\u{2B07}\u{2B1B}-\u{2B1C}\u{2B50}\u{2B55}\u{3030}\u{303D}\u{3297}\u{3299}\u{1F004}\u{1F0CF}\u{1F170}-\u{1F171}\u{1F17E}-\u{1F17F}\u{1F18E}\u{1F191}-\u{1F19A}\u{1F1E7}-\u{1F1EC}\u{1F1EE}-\u{1F1F0}\u{1F1F3}\u{1F1F5}\u{1F1F7}-\u{1F1FA}\u{1F201}-\u{1F202}\u{1F21A}\u{1F22F}\u{1F232}-\u{1F23A}\u{1F250}-\u{1F251}\u{1F300}-\u{1F320}\u{1F330}-\u{1F335}\u{1F337}-\u{1F37C}\u{1F380}-\u{1F393}\u{1F3A0}-\u{1F3C4}\u{1F3C6}-\u{1F3CA}\u{1F3E0}-\u{1F3F0}\u{1F400}-\u{1F43E}\u{1F440}\u{1F442}-\u{1F4F7}\u{1F4F9}-\u{1F4FC}\u{1F500}-\u{1F507}\u{1F509}-\u{1F53D}\u{1F550}-\u{1F567}\u{1F5FB}-\u{1F640}\u{1F645}-\u{1F64F}\u{1F680}-\u{1F68A}]+" {
+		didSet {
+			textStorage.searchExpression = NSRegularExpression(pattern: searchPattern, options: nil, error: nil)
+		}
+	}
+	
+	/**
+	* textStorage
+	* Reference to wrapped NSTextStorage
+	*/
+	public let textStorage: TextStorage
+	
+	/**
+	* delegate
+	* An optional instance of TextDelegate to handle text processing events
+	*
+	*/
+	public weak var delegate: TextDelegate?
+	
+	override public init() {
+		textStorage = TextStorage()
+		super.init()
+		textStorage.searchExpression = NSRegularExpression(pattern: searchPattern, options: nil, error: nil)
+		textStorage.textStorageWillProcessEdit = { (textStorage: TextStorage!, string: String!, range: NSRange) -> Void in
+			self.delegate?.textStorageWillProcessEdit?(self, textStorage: textStorage, string: string, range: range)
+		}
+		textStorage.textStorageDidProcessEdit = { (textStorage: TextStorage!, result: NSTextCheckingResult!, flags: NSMatchingFlags, stop: UnsafeMutablePointer<ObjCBool>) -> Void in
+			self.delegate?.textStorageDidProcessEdit?(self, textStorage: textStorage, string: textStorage.string, result: result, flags: flags, stop: stop)
+		}
+	}
+	
+	/**
+	* string
+	* Managed string value.
+	*/
+	public var string: String {
+		get {
+			return textStorage.string
+		}
+	}
+	
+	/**
+	* matches
+	* An array of matches found in the TextStorage string property based on the
+	* searchPattern property.
+	*/
+	public var matches: Array<String> {
+		get {
+			let results: Array<NSTextCheckingResult> = textStorage.searchExpression!.matchesInString(string, options: nil, range: NSMakeRange(0, count(string.utf16))) as! Array<NSTextCheckingResult>
+			return unique(map(results) {(self.string as NSString).substringWithRange($0.range)})
+		}
+	}
+	
+	/**
+	* unique
+	* Ensures a unique value in the matches return array.
+	*/
+	private func unique<S: SequenceType, E: Hashable where E == S.Generator.Element>(source: S) -> [E] {
+		var seen: [E:Bool] = [:]
+		return filter(source) {nil == seen.updateValue(true, forKey: $0)}
+	}
+}
\ No newline at end of file

Source/TextStorage.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+internal typealias TextStorageWillProcessEdit = (TextStorage!, String!, NSRange) -> Void
+internal typealias TextStorageDidProcessEdit = (TextStorage!, NSTextCheckingResult!, NSMatchingFlags, UnsafeMutablePointer<ObjCBool>) -> Void
+
+public class TextStorage: NSTextStorage {
+	/**
+	* store
+	* Acts as the model, storing the string value.
+	*/
+	private lazy var store: NSMutableAttributedString = NSMutableAttributedString()
+	
+	/**
+	* searchExpression
+	* Matches text within the TextStorage string property.
+	*/
+	internal var searchExpression: NSRegularExpression?
+	
+	/**
+	* textStorageWillProcessEdit
+	* If set, this block callback executes when there is a change in the TextStorage
+	* string value.
+	*/
+	internal var textStorageWillProcessEdit: TextStorageWillProcessEdit?
+	
+	/**
+	* textStorageDidProcessEdit
+	* If set, this block callback executes when a match is detected after a change in
+	* the TextStorage string value.
+	*/
+	internal var textStorageDidProcessEdit: TextStorageDidProcessEdit?
+	
+	required public init(coder aDecoder: NSCoder) {
+		super.init(coder: aDecoder)
+	}
+	
+	override public init() {
+		super.init()
+	}
+	
+	/**
+	* string
+	* Managed string value.
+	*/
+	override public var string: String {
+		get {
+			return store.string
+		}
+	}
+	
+	override public func processEditing() {
+		let range: NSRange = (string as NSString).paragraphRangeForRange(editedRange)
+		textStorageWillProcessEdit?(self, string, range)
+		searchExpression!.enumerateMatchesInString(string, options: nil, range: range) { (result: NSTextCheckingResult!, flags: NSMatchingFlags, stop: UnsafeMutablePointer<ObjCBool>) in
+			self.textStorageDidProcessEdit?(self, result, flags, stop)
+		}
+		super.processEditing()
+	}
+	
+	override public func attributesAtIndex(location: Int, effectiveRange range: NSRangePointer) -> [NSObject : AnyObject] {
+		return store.attributesAtIndex(location, effectiveRange: range)
+	}
+	
+	override public func replaceCharactersInRange(range: NSRange, withString str: String) {
+		store.replaceCharactersInRange(range, withString: str)
+		edited(NSTextStorageEditActions.EditedCharacters, range: range, changeInLength: count(str.utf16) - range.length)
+	}
+	
+	override public func setAttributes(attrs: [NSObject : AnyObject]?, range: NSRange) {
+		store.setAttributes(attrs, range: range)
+		edited(NSTextStorageEditActions.EditedAttributes, range: range, changeInLength: 0)
+	}
+}
\ No newline at end of file

Source/TextView.swift

+//
+// Copyright (C) 2015 GraphKit, Inc. <http://graphkit.io> and other GraphKit contributors.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program located at the root of the software package
+// in a file called LICENSE.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import UIKit
+
+private var defaultTextColor: UIColor = UIColor(red: 33/255, green: 33/255, blue: 33/255, alpha: 1)
+private var defaultPlaceholderColor: UIColor = UIColor(red: 159/255, green: 160/255, blue: 164/255, alpha: 1)
+
+public class TextView: UITextView {
+	/**
+	* label
+	* Placeholder label.
+	*/
+	private lazy var label: UILabel = UILabel()
+	
+	/**
+	* labelConstraints
+	* Autoresize constraints for the placeholder label.
+	*/
+	private var labelConstraints: Array<NSLayoutConstraint>?
+	
+	required public init(coder aDecoder: NSCoder) {
+		super.init(coder: aDecoder)
+		setupView()
+	}
+	
+	override public init(frame: CGRect, textContainer: NSTextContainer?) {
+		super.init(frame: frame, textContainer: textContainer)
+		if CGRectZero == frame {
+			setTranslatesAutoresizingMaskIntoConstraints(false)
+		}
+		setupView()
+	}
+	
+	/**
+	* deinit
+	* Notification observer removed from UITextView.
+	*/
+	deinit {
+		NSNotificationCenter.defaultCenter().removeObserver(self, name: UITextViewTextDidChangeNotification, object: nil)
+	}
+	
+	/**
+	* placeholder
+	* The placeholder label string.
+	*/
+	public var placeholder: String = "" {
+		didSet {
+			label.text = placeholder
+		}
+	}
+	
+	/**
+	* placeholderColor
+	* The placeholder color.
+	*/
+	public var placeholderColor: UIColor = defaultPlaceholderColor {
+		didSet {
+			label.textColor = placeholderColor
+		}
+	}
+	
+	/**
+	* font
+	* Font to use for placeholder based on UITextView font.
+	*/
+	override public var font: UIFont! {
+		didSet {
+			label.font = font
+		}
+	}
+	
+	/**
+	* textAlignment
+	* Sets placeholder textAlignment based on UITextView textAlignment.
+	*/
+	override public var textAlignment: NSTextAlignment {
+		didSet {
+			label.textAlignment = textAlignment
+		}
+	}
+	
+	/**
+	* text
+	* When set, updates the placeholder text.
+	*/
+	override public var text: String! {
+		didSet {
+			textViewTextDidChange()
+		}
+	}
+	
+	/**
+	* attributedText
+	* When set, updates the placeholder attributedText.
+	*/
+	override public var attributedText: NSAttributedString! {
+		didSet {
+			textViewTextDidChange()
+		}
+	}
+	
+	/**
+	* textContainerInset
+	* When set, updates the placeholder constraints.
+	*/
+	override public var textContainerInset: UIEdgeInsets {
+		didSet {
+			updateLabelConstraints()
+		}
+	}
+	
+	override public func layoutSubviews() {
+		super.layoutSubviews()
+		label.preferredMaxLayoutWidth = textContainer.size.width - textContainer.lineFragmentPadding * 2.0
+	}
+	
+	/**
+	* textViewTextDidChange
+	* Updates the label visibility when text is empty or not.
+	*/
+	internal func textViewTextDidChange() {
+		label.hidden = !text.isEmpty
+	}
+	
+	/**
+	* setupView
+	* Sets up the common initilized values.
+	*/
+	private func setupView() {
+		backgroundColor = .clearColor()
+		textColor = defaultTextColor
+		label.font = font
+		label.textColor = defaultPlaceholderColor
+		label.textAlignment = textAlignment
+		label.text = placeholder
+		label.numberOfLines = 0
+		label.backgroundColor = UIColor.clearColor()
+		label.setTranslatesAutoresizingMaskIntoConstraints(false)
+		addSubview(label)
+		
+		// label needs to be added to the view
+		// hierarchy before setting insets
+		textContainerInset = UIEdgeInsetsMake(16, 16, 16, 16)
+		
+		NSNotificationCenter.defaultCenter().addObserver(self, selector: "textViewTextDidChange", name: UITextViewTextDidChangeNotification, object: nil)
+		updateLabelConstraints()
+	}
+	
+	/**
+	* updateLabelConstraints
+	* Updates the placeholder constraints.
+	*/
+	private func updateLabelConstraints() {
+		if nil != labelConstraints {
+			removeConstraints(labelConstraints!)
+		}
+		
+		var constraints: Array<NSLayoutConstraint> = NSLayoutConstraint.constraintsWithVisualFormat("H:|-(left)-[placeholder]-(right)-|", options: nil, metrics: ["left": textContainerInset.left + textContainer.lineFragmentPadding, "right": textContainerInset.right + textContainer.lineFragmentPadding], views: ["placeholder": label]) as! Array<NSLayoutConstraint>
+		
+		constraints += NSLayoutConstraint.constraintsWithVisualFormat("V:|-(top)-[placeholder]-(>=bottom)-|", options: nil, metrics: ["top": textContainerInset.top, "bottom": textContainerInset.bottom], views: ["placeholder": label]) as! Array<NSLayoutConstraint>
+		
+		labelConstraints = constraints
+		addConstraints(constraints)
+	}
+}

Tests/FocusKitTests.swift

+//
+//  FocusKitTests.swift
+//  FocusKitTests
+//
+//  Created by Daniel Dahan on 2015-08-22.
+//  Copyright (c) 2015 GraphKit Inc. All rights reserved.
+//
+
+import UIKit
+import XCTest
+
+class FocusKitTests: XCTestCase {
+    
+    override func setUp() {
+        super.setUp()
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+    
+    override func tearDown() {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+        super.tearDown()
+    }
+    
+    func testExample() {
+        // This is an example of a functional test case.
+        XCTAssert(true, "Pass")
+    }
+    
+    func testPerformanceExample() {
+        // This is an example of a performance test case.
+        self.measureBlock() {
+            // Put the code you want to measure the time of here.
+        }
+    }
+    
+}

Tests/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>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>io.graphkit.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>