如何在 Swift 中重复链接动画?
How can I repeat chained animation in Swift?
我想永远为整个链条设置动画。
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseOut, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 9, y: 9)
}) { (_) in
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseIn, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
}, completion: nil)
}
将其包装在一个方法中:
func repeatingAnimation() {
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseOut, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 9, y: 9)
}) { (_) in
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseIn, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
}, completion: { [weak self] _ in
self?.repeatingAnimation()
})
}
}
您可以将两个动画包裹在一个关键帧动画中。然后你可以 .repeat
那:
UIView.animateKeyframes(withDuration: 4.4, delay: 0, options: .repeat, animations: {
UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 2.0/4.4) {
self.circleImageView.transform = .init(scaleX: 9, y: 9)
}
UIView.addKeyframe(withRelativeStartTime: 0.5, relativeDuration: 2.0/4.4) {
self.circleImageView.transform = .init(scaleX: 0.01, y: 0.01)
}
})
我想永远为整个链条设置动画。
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseOut, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 9, y: 9)
}) { (_) in
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseIn, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
}, completion: nil)
}
将其包装在一个方法中:
func repeatingAnimation() {
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseOut, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 9, y: 9)
}) { (_) in
UIView.animate(withDuration: 2.0, delay: 0.2, options: .curveEaseIn, animations: {
self.circleImageView.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
}, completion: { [weak self] _ in
self?.repeatingAnimation()
})
}
}
您可以将两个动画包裹在一个关键帧动画中。然后你可以 .repeat
那:
UIView.animateKeyframes(withDuration: 4.4, delay: 0, options: .repeat, animations: {
UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 2.0/4.4) {
self.circleImageView.transform = .init(scaleX: 9, y: 9)
}
UIView.addKeyframe(withRelativeStartTime: 0.5, relativeDuration: 2.0/4.4) {
self.circleImageView.transform = .init(scaleX: 0.01, y: 0.01)
}
})