Lollipop UITableView highlight effect in iOS

A small UITableViewCell subclass in swift for this radial animation... Have fun :-)

GitHub Link:

https://github.com/raegtime/lollipopMeetsIOS

	import UIKit
	class INAnimatedTableViewCell: UITableViewCell
	{
	private var lastTouch : UITouch?
	var animationDuration : CFTimeInterval = 0.5 // "animate over 0.5 seconds or so.."
	override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent)
	{
	if selectedBackgroundView == nil
	{
	return
	}
	if let firstTouch = touches.first as? UITouch
	{
	lastTouch = firstTouch
	}
	super.touchesBegan(touches, withEvent: event)
	var radius : CGFloat = CGRectGetWidth(self.contentView.frame)>CGRectGetHeight(self.contentView.frame) ? CGRectGetWidth(self.contentView.frame):CGRectGetHeight(self.contentView.frame)
	var circle = CAShapeLayer()
	var bezier:UIBezierPath = UIBezierPath(roundedRect: CGRectMake(-radius, -radius, 2.0*radius, 2.0*radius), cornerRadius: radius)
	circle.path = bezier.CGPath
	var point : CGPoint = CGPointMake(CGRectGetMidX(selectedBackgroundView.frame), 0)
	if let t = lastTouch
	{
	point = CGPointMake(t.locationInView(selectedBackgroundView).x, t.locationInView(selectedBackgroundView).y)
	}
	circle.position = point
	circle.fillColor = UIColor.blackColor().CGColor
	selectedBackgroundView.layer.mask = circle
	var drawAnimation : CABasicAnimation = CABasicAnimation(keyPath: "transform.scale")
	drawAnimation.duration = animationDuration
	// Animate from no part of the stroke being drawn to the entire stroke being drawn
	drawAnimation.fromValue = 0
	drawAnimation.toValue = 1
	// Experiment with timing to get the appearence to look the way you want
	drawAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
	// Add the animation to the circle
	circle.addAnimation(drawAnimation, forKey:"drawCircleAnimation");
	}
	}

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