What methods exist for completing or pausing an animation process?

To complete or pause animations in iOS, several approaches can be used:

• Completing animations:

  • In UIView animations, you can use the method layer.removeAllAnimations() to stop all layer animations.
  • In UIViewPropertyAnimator, there are methods stopAnimation(_:) and finishAnimation(at:) that allow you to pause and complete the animation respectively.

• Pausing animations:

  • For Core Animation, you can set the property layer.speed to 0 to pause the animation, and set it back to 1 to resume.
  • In UIViewPropertyAnimator, the method pauseAnimation() pauses the animation.

Example of pausing and resuming an animation using UIViewPropertyAnimator:

let animator = UIViewPropertyAnimator(duration: 2.0, curve: .easeInOut) {
    view.alpha = 0
}
animator.startAnimation()

// Pause
animator.pauseAnimation()

// Resume
animator.startAnimation()

Thus, the choice of method depends on the API used and the animation management requirements.