在bezier路径中将图像添加到CAShapeLayer

Question

我正在努力实施 我的应用程序中的David M. Gay's pow5mult库，我试图将自定义图像添加到shapelayer中，或者在切片内部以任何其他方式添加到其边界和路径，我无法这样做。我尝试将图像添加到新shapelayer的内容中并将其添加到我的饼图中，但它也不起作用。

for wedgeNumber in 0..<numberOfWedges {
        let wedge: SpinWheelWedge = source.wedgeForSliceAtIndex(index: wedgeNumber)

        //Wedge shape
        wedge.shape.configureWedgeShape(index: wedgeNumber, radius: radius, position: spinWheelCenter, degreesPerWedge: degreesPerWedge)
        wedge.layer.addSublayer(wedge.shape)

        let layer = CAShapeLayer()
        layer.contents = UIImage(named: "sample.jpg")?.cgImage
        layer.bounds = wedge.shape.bounds
        layer.path = wedge.shape.path
        wedge.shape.addSublayer(layer)


        spinWheelView.addSubview(wedge)
    }

模拟器中的输出：

为什么我无法将图像添加到形状图层？

需要的输出

提前致谢

Answer 1

class CustomImageView: UIImageView{ 

var bezierPath = UIBezierPath()

override func setNeedsLayout() {
    bezierPath.reversing()
    let shapeLayer = CAShapeLayer()
    shapeLayer.frame = self.bounds
    shapeLayer.path = bezierPath.cgPath
    self.layer.mask = shapeLayer
    self.layer.masksToBounds = true
}

}

您修改后的代码

for wedgeNumber in 0..<numberOfWedges {
    let wedge: SpinWheelWedge = source.wedgeForSliceAtIndex(index: wedgeNumber)

    //Wedge shape
    wedge.shape.configureWedgeShape(index: wedgeNumber, radius: radius, position: spinWheelCenter, degreesPerWedge: degreesPerWedge)
    wedge.layer.addSublayer(wedge.shape)

    let imageLayer = CustomImageView()
    imageLayer.image = UIImage(named: "sample.jpg")
    imageLayer.bezierPath = wedge.shape.path
    imageLayer.setNeedsLayout()

    // Here you will get an image view with specified path 
       you can subview this imageLayer to the required view
}