ios - 在其 bezierpath 中将图像添加到 CAShapeLayer

Question

我正在努力实现 https://github.com/joshdhenry/SpinWheelControl我的应用程序中的库，对于每个轮子切片，我试图将自定义图像添加到它的 shapelayer，或者切片内的任何其他可能的方式到它的边界和路径，我无法这样做。我尝试将图像添加到新的形状层的内容中，并将其添加到我的饼图切片中，但也没有用。

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)
    }

模拟器输出:

为什么我无法将图像添加到形状层？？

需要输出

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
}

}

你修改后的代码

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
}