I'm trying to perform auto repeat of my image rotation animation with CABasicAnimation. I have tried to search on web how to set such property but was unable to find that. Is it really no such property for CA animation? I know that you can set some huge value (here) to repeatCount property but hey, why then does UIView animateWithDuration has an option UIViewAnimationOptionRepeat and what the value is hardcoded for it?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):
问题:
回答1:
No, this is the way you're supposed to do it according to the documentation.
Setting this property to
HUGE_VALF
will cause the animation to repeat forever.
Update for Swift:
HUGE_VALF is not exposed to Swift. However, my understanding from this page is that HUGE_VALF is intended to be infinity (in fact, INFINITY
is defined as HUGE_VALF
). Since Swift's FloatingPointType
protocol provides a static var infinity
, you can simply write
myAnimation.repeatCount = .infinity
回答2:
For swift 3.0 and above
let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
rotationAnimation.fromValue = 0
rotationAnimation.toValue = CGFloat.pi * 2
rotationAnimation.duration = 1
rotationAnimation.repeatCount = .infinity
holderView.btnRefresh.layer.add(rotationAnimation, forKey: "spinAnimation")