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Just a UICollectionview cell animation on touch although it could be performed on any uiview.
import UIKit
@IBDesignable class PulseTouchCollectionViewCell: UICollectionViewCell {
@IBInspectable var scaleFactor : CGFloat = 1.3
@IBInspectable var animationColor : UIColor = UIColor.green
@IBInspectable var startingOpacity : Float = 0.2
@IBInspectable var animationDuration : Double = 0.8
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
let coverView = UIView(frame: bounds)
coverView.autoresizingMask = [.flexibleWidth,.flexibleHeight]
coverView.backgroundColor = UIColor.clear
self.addSubview(coverView)
let touch = touches.first!
let point = touch.location(in: self)
let ourTouchView = UIView(frame: CGRect(x: point.x - 5, y: point.y - 5, width: 10, height: 10))
let circleMaskPathInitial = UIBezierPath(ovalIn: ourTouchView.frame)
let radius = max((self.bounds.width * scaleFactor) , (self.bounds.height * scaleFactor))
let circleMaskPathFinal = UIBezierPath(ovalIn: ourTouchView.frame.insetBy(dx: -radius, dy: -radius))
let rippleLayer = CAShapeLayer()
rippleLayer.opacity = startingOpacity
rippleLayer.fillColor = animationColor.cgColor
rippleLayer.path = circleMaskPathFinal.cgPath
coverView.layer.addSublayer(rippleLayer)
//fade up
let fadeUp = CABasicAnimation(keyPath: "opacity")
fadeUp.beginTime = CACurrentMediaTime()
fadeUp.duration = animationDuration * 0.6
fadeUp.toValue = 0.6
fadeUp.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
fadeUp.fillMode = kCAFillModeForwards
fadeUp.isRemovedOnCompletion = false
rippleLayer.add(fadeUp, forKey: nil)
//fade down
let fade = CABasicAnimation(keyPath: "opacity")
fade.beginTime = CACurrentMediaTime() + animationDuration * 0.60
fade.duration = animationDuration * 0.40
fade.toValue = 0
fade.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
fade.fillMode = kCAFillModeForwards
fade.isRemovedOnCompletion = false
rippleLayer.add(fade, forKey: nil)
//change path
CATransaction.begin()
let maskLayerAnimation = CABasicAnimation(keyPath: "path")
maskLayerAnimation.fromValue = circleMaskPathInitial.cgPath
maskLayerAnimation.toValue = circleMaskPathFinal.cgPath
maskLayerAnimation.beginTime = CACurrentMediaTime()
maskLayerAnimation.duration = animationDuration
maskLayerAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
CATransaction.setCompletionBlock({
coverView.removeFromSuperview()
})
rippleLayer.add(maskLayerAnimation, forKey: "path")
CATransaction.commit()
}
}
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