如何绘制UIBezierPaths Swift

Question

这就是我想要做的：

在UIBezierPath的帮助下，我希望像此链接一样绘制蒙版

// Create an image context containing the original UIImage.
let maskWithHole = CAShapeLayer()
let biggerRect = CGRect(x: 0, y: 0, width: withSize.width, height: withSize.height)
let maskPath = UIBezierPath() //UIBezierPath(roundedRect: toRectArray.first!, cornerRadius: 40)

maskPath.move(to: CGPoint(x: biggerRect.minX, y: biggerRect.minY))
maskPath.addLine(to: CGPoint(x: biggerRect.minX, y: biggerRect.maxY))

maskPath.addLine(to: CGPoint(x: biggerRect.maxX, y: biggerRect.maxY))
maskPath.addLine(to: CGPoint(x: biggerRect.maxX, y: biggerRect.minY))
maskPath.addLine(to: CGPoint(x: biggerRect.minX, y: biggerRect.minY))

let smallerRect = CGRect(x: 10, y: 10, width: withSize.width - 10, height: withSize.height - 10)

maskPath.move(to: CGPoint(x: smallerRect.minX, y: smallerRect.minY))
maskPath.addLine(to: CGPoint(x: smallerRect.minX, y: smallerRect.maxY))

maskPath.addLine(to: CGPoint(x: smallerRect.maxX, y: smallerRect.maxY))
maskPath.addLine(to: CGPoint(x: smallerRect.maxX, y: smallerRect.minY))
maskPath.addLine(to: CGPoint(x: smallerRect.minX, y: smallerRect.minY))
maskWithHole.path = maskPath.cgPath
maskWithHole.fillRule = kCAFillRuleEvenOdd
maskWithHole.fillColor = UIColor.orange.cgColor
maskWithHole.opacity = 1.0

这是我的工作，我在图像的内容内部进行了剪切，但在像链接图像一样进行剪切时希望在内部进行圆角校正。