我saw一个lot的answers关于这个topic，但无法解决我的特殊情况。HereisavideowithcompleteanimationandloggingtimelineclassAnimationDelegate:UIView{deinit{print("AnimationDelegatedeinitialized")}overridefuncanimationDidStart(anim:CAAnimation){print("animationDidStart")}overridefuncanimationDidStop(anim:CAAnimation,finished