How to cancel UIView block-based animation?

Question

I\'ve searched loads of SO stuff and in Apple\'s references, but still unable to manage my problem.

What I have:

1. A screen with 2 UIImageView

Answer 1

For iOS 10 use UIViewPropertyAnimator to animate. It provides methods to start, stop and pause UIView animations.

 let animator = UIViewPropertyAnimator(duration: 2.0, curve: .easeOut){
        self.view.alpha = 0.0
 }
 // Call this to start animation.
 animator.startAnimation()

 // Call this to stop animation.
 animator.stopAnimation(true)