Question

以前，您可以快速执行以下操作：

let animator = UIViewPropertyAnimator(duration: 0.25, curve: .easeIn) {
  UIView.setAnimationRepeatCount(Float.infinity)
  UIView.setAnimationRepeatAutoreverses(true)
  let transform = CATransform3DIdentity
  let rotate = CATransform3DRotate(transform, 45, 1, 1, 0)
  self.ex.layer.transform = rotate
}

但是，现在UIView.setAnimationRepeatCount和UIView.setAnimationRepeatAutoreverses上有一条弃用消息。有人知道他们被替换了吗？我是否仍然可以使用UIViewPropertyAnimator，还是必须去CABasicAnimation之类的东西？

消息为：

'setAnimationRepeatCount'在iOS 13.0中已被弃用：改为使用基于块的动画API

'setAnimationRepeatAutoreverses'在iOS 13.0中已弃用：改为使用基于块的动画API

Answer 1

您可以执行以下操作：

UIView.animate(withDuration: 0.25, delay: 0, options: [.autoreverse, .curveEaseIn, .repeat], animations: {
    let transform = CATransform3DIdentity
    let rotate = CATransform3DRotate(transform, 45, 1, 1, 0)
    self.ex.layer.transform = rotate
}, completion: nil)

对于所有可能的呼叫，您可以检查this link

此外，如果您确实需要UIViewPropertyAnimator，则它有一个similar init：

 UIViewPropertyAnimator.runningPropertyAnimator(withDuration: 0.25, delay: 0, options: [.autoreverse, .curveEaseIn, .repeat], animations: {
    let transform = CATransform3DIdentity
    let rotate = CATransform3DRotate(transform, 45, 1, 1, 0)
    self.ex.layer.transform = rotate
})

在iOS 13.x中重复/自动反转动画

1 个答案: