What protocol did you use to implement user animation effects?

To implement custom animation effects in iOS, the UIViewAnimating protocol or its subclasses, such as UIViewPropertyAnimator, are commonly used.

The CAAnimationDelegate protocol is also frequently used to manage animations at the Core Animation level.

Example of using UIViewPropertyAnimator:

let animator = UIViewPropertyAnimator(duration: 0.5, curve: .easeInOut) {
    myView.alpha = 0
    myView.transform = CGAffineTransform(scaleX: 0.5, y: 0.5)
}
animator.startAnimation()

Thus, animation-related protocols allow flexible control over effects and their lifecycle.