设置图层蒙版UIBezierPath上海华

Question

所以我有，我有UIBezierPath画一个圆，我需要设置上海华能与我的圈子一样，这里是我的代码：

override func draw(_ rect: CGRect) { 
    let circlePath = UIBezierPath(arcCenter: CGPoint(x: rect.midX, y: rect.midY), radius: circleRadius, startAngle: 0.0, endAngle:CGFloat(Double.pi * 2), clockwise: true) 
    let strokeColorAnimation = CABasicAnimation(keyPath: "strokeColor") 
    let strokeEndAnimation = CABasicAnimation(keyPath: "strokeEnd") 

    shapeLayer.path = circlePath.cgPath 
    shapeLayer.lineWidth = 0.3 * circleRadius 
    shapeLayer.fillColor = UIColor.clear.cgColor 

    if oldColor == nil { oldColor = newColor } 
    if oldStrokeEnd == nil { oldStrokeEnd = 0.01 * currentCGFloatProximity } 

    strokeColorAnimation.fromValue = oldColor!.cgColor 
    strokeColorAnimation.toValue = newColor.cgColor 
    strokeColorAnimation.duration = 0.3 
    strokeColorAnimation.isRemovedOnCompletion = false 
    strokeColorAnimation.fillMode = kCAFillModeForwards 

    strokeEndAnimation.fromValue = oldStrokeEnd 
    strokeEndAnimation.toValue = 0.01 * currentCGFloatProximity 
    strokeEndAnimation.duration = 0.3 
    strokeEndAnimation.isRemovedOnCompletion = false 
    strokeEndAnimation.fillMode = kCAFillModeForwards 

    shapeLayer.add(strokeColorAnimation, forKey: strokeColorAnimation.keyPath) 
    shapeLayer.add(strokeEndAnimation, forKey: strokeEndAnimation.keyPath) 

    layer.mask = shapeLayer 


    // layer.addSublayer(shapeLayer) 


    oldColor = newColor 
    oldStrokeEnd = 0.01 * currentCGFloatProximity 
} 

这里的时候，我加入上海华盈的是层光掩膜我shapeLayer我得到这样的结果，它是黑色，不改变它的颜色：当我添加子层上海华盈的层我得到这样的结果

//layer.mask = shapeLayer 

    layer.addSublayer(shapeLayer) 

：

我想要的只是第一张图片的结果，但带有彩色圆圈。希望得到帮助。对不起我的英语不好。

Answer 1

好吧，我通过添加新的形状图层来修复它，但也许有人会有更好的解决方案。 现在我有这样的代码：

override func draw(_ rect: CGRect) { 
    let circlePath = UIBezierPath(arcCenter: CGPoint(x: rect.midX, y: rect.midY), radius: circleRadius, startAngle: 0.0, endAngle:CGFloat(Double.pi * 2), clockwise: true) 
    let strokeColorAnimation = CABasicAnimation(keyPath: "strokeColor") 
    let strokeEndAnimation = CABasicAnimation(keyPath: "strokeEnd") 

    circleLayer.path = circlePath.cgPath 
    circleLayer.lineWidth = 0.3 * circleRadius 
    circleLayer.fillColor = UIColor.clear.cgColor 

    backgroundLayer.path = circlePath.cgPath 
    backgroundLayer.lineWidth = 0.3 * circleRadius 
    backgroundLayer.strokeColor = UIColor.black.cgColor 
    backgroundLayer.fillColor = UIColor.clear.cgColor 


    if oldColor == nil { oldColor = newColor } 
    if oldStrokeEnd == nil { oldStrokeEnd = 0.01 * currentCGFloatProximity } 

    strokeColorAnimation.fromValue = oldColor!.cgColor 
    strokeColorAnimation.toValue = newColor.cgColor 
    strokeColorAnimation.duration = 0.3 
    strokeColorAnimation.isRemovedOnCompletion = false 
    strokeColorAnimation.fillMode = kCAFillModeForwards 

    strokeEndAnimation.fromValue = oldStrokeEnd 
    strokeEndAnimation.toValue = 0.01 * currentCGFloatProximity 
    strokeEndAnimation.duration = 0.3 
    strokeEndAnimation.isRemovedOnCompletion = false 
    strokeEndAnimation.fillMode = kCAFillModeForwards 

    circleLayer.add(strokeColorAnimation, forKey: strokeColorAnimation.keyPath) 
    circleLayer.add(strokeEndAnimation, forKey: strokeEndAnimation.keyPath) 

    layer.mask = backgroundLayer 

    layer.addSublayer(circleLayer) 
    oldColor = newColor 
    oldStrokeEnd = 0.01 * currentCGFloatProximity 
}