Simple demo of ScreenRecorder... Creates animated points when the user quickly flicks the screen.

WorkSpace.swift

// import C4
import UIKit

class WorkSpace: CanvasController {
    var screenRecorder: ScreenRecorder?
    override func setup() {
        self.screenRecorder = ScreenRecorder()
        self.screenRecorder?.recordingEndedAction = {
            self.screenRecorder?.showPreviewInController(self)
        }

        addPan()
        addStartRecording()
    }

    func addStartRecording() {
        canvas.addLongPressGestureRecognizer { (locations, center, state) in
            if state == .Began  && !self.screenRecorder!.recording {
                ShapeLayer.disableActions = true
                let r = Rectangle(frame: self.canvas.bounds)
                self.canvas.add(r)
                let a = ViewAnimation(duration: 0.25) {
                    r.opacity = 0.0
                }
                a.addCompletionObserver {
                    r.removeFromSuperview()
                    self.screenRecorder?.start(5.0)
                }
                a.animate()
            }
        }

    }

    func addPan() {
        canvas.addPanGestureRecognizer { (locations, center, translation, velocity, state) in
            if state == .Began {
                for location in locations {
                    ShapeLayer.disableActions = true
                    let c = Circle(center: location, radius: 1)
                    self.canvas.add(c)
                    ShapeLayer.disableActions = false

                    let a = ViewAnimation(duration: 0.5) {
                        let newC = Circle(center: location, radius: 50.0)
                        c.path = newC.path
                        c.adjustToFitPath()
                        c.center = location
                        c.opacity = 0.0
                    }

                    a.addCompletionObserver() {
                        c.removeFromSuperview()
                    }
                    a.animate()
                }
            }
        }
    }
}