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我有一个目标图像,我试图使用动画来裁剪外环而不调整其大小。我正在使用UIBelzierPath来做到这一点,我有一些原因不能将它直接放在我的图像上,因为它只是动画像右下角那样,直接应用于imageView。我究竟做错了什么?我与动画斗争,所以任何帮助都会很棒。不以imageView为中心的动画
@IBOutlet weak var image: UIImageView!
@IBAction func animate(sender: AnyObject) {
animateCollapse()
}
private func animateCollapse() {
let view = image
let circleMaskPathInitial = UIBezierPath(ovalInRect: view.frame)
let circleMaskPathFinal = UIBezierPath(ovalInRect: CGRectInset(view.frame, 10 , 10))
performAnimation(circleMaskPathInitial, finalPath: circleMaskPathFinal)
}
private func performAnimation(initialPath: UIBezierPath, finalPath: UIBezierPath) {
let maskLayer = CAShapeLayer()
maskLayer.path = finalPath.CGPath
image.layer.mask = maskLayer
let maskLayerAnimation = CABasicAnimation(keyPath: "path")
maskLayerAnimation.fromValue = initialPath.CGPath
maskLayerAnimation.toValue = finalPath.CGPath
maskLayerAnimation.duration = 1.0
maskLayerAnimation.delegate = self
maskLayer.addAnimation(maskLayerAnimation, forKey: "path")
}
也必须更新circleMaskPathFinal带边界 - > UIBezierPath(ovalInRect:CGRectInset(view.bounds,10,10)) –
谢谢基思 –