override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let rect = CGRect(x: 58, y: 40, width: 200, height: 200)
let imageView = UIImageView(frame: rect)
let image = UIImage(named: "Pic")
imageView.image = image//给图像视图指定要显示的图片
imageView.tag = 1//设置图像视图的标识值,以方便后期对图像视图的调用
self.view.addSubview(imageView)
let button = UIButton(type: UIButtonType.system)//初始化一个按钮对象,点击按钮时播放动画
button.frame = CGRect(x: 58, y: 400, width: 200, height: 44)
button.backgroundColor = UIColor.lightGray
button.setTitle("Tap", for: UIControlState())
button.addTarget(self, action: #selector(ViewController.playAnimation), for: UIControlEvents.touchUpInside)
self.view.addSubview(button)
}
@objc func playAnimation() {
UIView.beginAnimations(nil, context: nil)//发出开始动画的请求
UIView.setAnimationCurve(.easeOut)//设置动画的播放速度为淡入淡出
UIView.setAnimationDuration(5)//设置动画时长5秒
UIView.setAnimationBeginsFromCurrentState(true)//设置动画从当前状态开始播放
let view = self.view.viewWithTag(1)//通过标识值找到之前创建的图像视图,作为动画的载体
UIView.setAnimationTransition(.flipFromRight, for: view!, cache: true)//设置动画类型为翻转动画
view?.frame = CGRect(x: 50, y: 50, width: 0, height: 0)//视图翻转时移到目标位置并缩小至不可见
UIView.setAnimationDelegate(self)//设置动画代理对象为当前视图控制器类,动画结束后控制台打印输出日志
UIView.setAnimationDidStop(#selector(ViewController.animationStop))//设置动画结束时执行的方法
UIView.commitAnimations()//调用视图的提交动画方法,标志着动画块的结束
}
@objc func animationStop() {//响应动画结束事件
print("Animation Stop.")
self.view.viewWithTag(1)?.removeFromSuperview()//将图像视图从父视图中移除
}
Xcode9学习笔记61 - 检测UIView视图动画的结束事件
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转载自blog.csdn.net/u011728344/article/details/78566470
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