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我使用實現倒裝卡時鐘動畫的UI組件工作。所有工作都很好,但是當我將頂部CALayer內容更改爲新圖像時,舊圖像在更改之前保持可見。它會造成混亂效應。爲了更好地解釋我放在GIF動畫波紋管:在動畫完成前更改CALayer內容
這是改變一個CALayer的內容代碼:
firstTopLayer.contents = secondTopLayer.contents
let bottomAnim = CABasicAnimation(keyPath: "transform")
bottomAnim.duration = animDuration/2
bottomAnim.repeatCount = 1
bottomAnim.fromValue = NSValue.init(caTransform3D:
CATransform3DMakeRotation((CGFloat)(M_PI_2), 1, 0, 0))
bottomAnim.toValue = NSValue.init(caTransform3D:
CATransform3DMakeRotation(0, 1, 0, 0))
bottomAnim.isRemovedOnCompletion = true
bottomAnim.timingFunction = CAMediaTimingFunction.init(name: kCAMediaTimingFunctionEaseIn)
firstBottomLayer.add(bottomAnim, forKey: "bottom")
firstBottomLayer.contents = self.bufferContents
欲瞭解更多信息,我把一個鏈接到repository