缩小动画 Swift

Question

我正在尝试为 UIImageView 做一些动画（仅缩小）

1-我将框架设置为大于屏幕以使其放大，如下所示：

private lazy var imageView: UIImageView = {
    let image = UIImageView()
    image.frame = CGRect(x: 0, y: 0, width: view.frame.width + 300, height: view.frame.height + 300)
    image.center = view.center
    image.image = UIImage(named: "1111")
    image.contentMode = .scaleAspectFill
    return image
}()

我想让框架回到屏幕尺寸，如下所示：

func firstAnimation() {
    UIView.animate(withDuration: 15, animations: {

        // HERE 
        self.imageView.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height)

    }) { (finished) in
        self.secondAnimation()
    }
}

不幸的是我没有和我一起工作。

这里是完整的类代码： github

Answer 1

斯威夫特 4+

用于CGAffineTransform.identity将图像大小调整为第一个identity

UIView.animate(withDuration: 0.5, delay: 0.0, options: UIViewAnimationOptions.curveEaseIn, animations: {
        
       // HERE
       self.imageview.transform = CGAffineTransform.identity.scaledBy(x: 2, y: 2) // Scale your image

 }) { (finished) in
     UIView.animate(withDuration: 1, animations: {
       
      self.imageview.transform = CGAffineTransform.identity // undo in 1 seconds

   })
}