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我试图通过使用CATransform3DMakeScale
来设置CALayer
以增加视图控制器底部的宽度。我可以使图层缩放得很好,但是当我尝试通过动画应用转换时,图层不进行任何动画转换。变换不适用于动画
let progressBar1 = CALayer()
override func viewDidAppear() {
progressBar1.bounds = CGRect(x: 0, y: 0, width: 1, height: 5)
progressBar1.position = CGPoint(x: 0, y: 600)
progressBar1.backgroundColor = UIColor.white.cgColor
view.layer.addSublayer(progressBar1)
extendBar1()
}
func extendBar1(){
let transform1 = CATransform3DMakeScale(30, 1, 0)
let anim = CABasicAnimation(keyPath: "transform")
anim.isRemovedOnCompletion = false
anim.fillMode = kCAFillModeForwards
anim.toValue = NSValue(caTransform3D:transform1)
anim.duration = 10.00
progressBar1.add(anim, forKey: "transform")
}
我也试图与CATransaction
以下,但我得到了相同的结果
func extendBar3(){
let transform1 = CATransform3DMakeScale(30, 1, 0)
CATransaction.begin()
CATransaction.setAnimationDuration(7.0)
progressBar1.transform = transform1
CATransaction.commit()
}