UIView.animate(withDuration: 1, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 5, options: [], animations: { [unowned self] in
switch self.currentAnimation {
case 0:
self.imageView.transform = CGAffineTransform(scaleX: 2, y: 2)
case 1:
self.imageView.transform = CGAffineTransform.identity
case 2:
self.imageView.transform = CGAffineTransform(translationX: -256, y: -256)
case 3:
self.imageView.transform = CGAffineTransform.identity
case 4:
self.imageView.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
case 5:
self.imageView.transform = CGAffineTransform.identity
case 6:
self.imageView.alpha = 0.1
self.imageView.backgroundColor = UIColor.green
case 7:
self.imageView.alpha = 1
self.imageView.backgroundColor = UIColor.clear
default:
break
}
}) { [unowned self] (finished: Bool ) in
self.tap.isHidden = false
}
-
usingSpringWithDamping：弹簧动画的阻尼值，也就是相当于摩擦力的大小，该属性的值从0.0到1.0之间，越靠近0，阻尼越小，弹动的幅度越大，反之阻尼越大，弹动的幅度越小，如果大道一定程度，会出现弹不动的情况。
