/// 扩展UIView增加抖动方法 /// /// - Parameters: /// - direction: 抖动方向(默认是水平方向) /// - times: 抖动次数(默认6次) /// - interval: 每次抖动时间(默认0.2秒) /// - delta: 抖动偏移量(默认4) /// - completion: 抖动动画结束后的回调 public func shake(direction: ShakeDirection = .horizontal, times: Int = 6, interval: TimeInterval = 0.2, delta: CGFloat = 4, completion: (() -> Void)? = nil) { //播放动画 UIView.animate(withDuration: interval, animations: { () -> Void in switch direction { case .horizontal: self.layer.setAffineTransform( CGAffineTransform(translationX: delta, y: 0)) break case .vertical: self.layer.setAffineTransform( CGAffineTransform(translationX: 0, y: delta)) break } }) { (complete) -> Void in //如果当前是最后一次抖动,则将位置还原,并调用完成回调函数 if (times == 0) { UIView.animate(withDuration: interval, animations: { () -> Void in self.layer.setAffineTransform(CGAffineTransform.identity) }, completion: { (complete) -> Void in completion?() }) } //如果当前不是最后一次抖动,则继续播放动画(总次数减1,偏移位置变成相反的) else { self.shake(direction: direction, times: times - 1, interval: interval, delta: delta * -1, completion:completion) } } }