iPhone - having a Ripple effect on a UIImageView

Question

I am attempting to create a ripple like effect on an imageView when it is touched down on, however I do not understand how to implement OpenGL for windows and porting it to

Answer 1

For Swift 3.0

let animation = CATransition()
animation.delegate = self
animation.duration = 5.0
animation.timingFunction = CAMediaTimingFunction(name : kCAMediaTimingFunctionEaseInEaseOut)
animation.type = "rippleEffect"
viewForAnimation.layer.add(animation, forKey: nil)