Animate UIView out scale的行爲奇怪

Question

我以前有過這個問題，但不知道它是什麼。

如果我在Playground中爲「獨立」動畫製作視圖，這種事情看起來很好，但現在看起來就像在提供的GIF中。

動畫效果看起來很好，但是當我想將它製作成動畫（縮放）時，它會變得最大化然後消失。

下面是它的動畫代碼：

self.circleView.transform = CGAffineTransformIdentity 
UIView.animateWithDuration(0.5, delay: 0, options: [], animations: { 
    self.circleView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001); 
}, completion: { 
    finished in 
    if finished { 
     self.resetStyle() 
     self.circleView.hidden = true 
     self.circleView.transform = CGAffineTransformIdentity 
    } 
}) 

func resetStyle() { 
    self.circleView.transform = CGAffineTransformIdentity 
    self.circleView.backgroundColor = nil 
    self.textLabel.textColor = UIColor.blackColor() 
} 

Answer 1

試試這個：

@IBOutlet weak var circleView: UIView! 

@IBAction func leftAction(sender: AnyObject) { 
    self.circleView.layer.transform = CATransform3DMakeScale(0.001, 0.001, 1) 
    UIView.animateWithDuration(0.5) { 
     self.circleView.layer.transform = CATransform3DIdentity 
    } 
} 

@IBAction func rightAction(sender: AnyObject) { 
    circleView.layer.transform = CATransform3DIdentity 
    UIView.animateWithDuration(0.5) { 
     self.circleView.layer.transform = CATransform3DMakeScale(0.001, 0.001, 1) 
    } 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 

    circleView.backgroundColor = .blueColor() 
    circleView.layer.cornerRadius = CGRectGetMidY(circleView.bounds) 
}