創(chuàng)建Path
typealias CornersRadius = (topLeft: CGFloat, topRight: CGFloat, bottomLeft: CGFloat, bottomRight: CGFloat)
//創(chuàng)建Path
func createPath(bounds:CGRect, cornersRadius:CornersRadius) -> CGPath {
let minX = bounds.minX
let minY = bounds.minY
let maxX = bounds.maxX
let maxY = bounds.maxY
let topLeftCenterX = minX + cornersRadius.topLeft
let topLeftCenterY = minY + cornersRadius.topLeft
let topRightCenterX = maxX - cornersRadius.topRight
let topRightCenterY = minY + cornersRadius.topRight
let bottomLeftCenterX = minX + cornersRadius.bottomLeft
let bottomLeftCenterY = maxY - cornersRadius.bottomLeft
let bottomRightCenterX = maxX - cornersRadius.bottomRight
let bottomRightCenterY = maxY - cornersRadius.bottomRight
let path = CGMutablePath()
path.addArc(center: CGPoint(x: topLeftCenterX, y: topLeftCenterY), radius: cornersRadius.topLeft, startAngle: CGFloat(Double.pi), endAngle: CGFloat(3 * Double.pi / 2.0), clockwise: false)
path.addArc(center: CGPoint(x: topRightCenterX, y: topRightCenterY), radius: cornersRadius.topRight, startAngle: CGFloat(3 * Double.pi / 2.0), endAngle: 0, clockwise: false)
path.addArc(center: CGPoint(x: bottomRightCenterX, y: bottomRightCenterY), radius: cornersRadius.bottomRight, startAngle: 0, endAngle: CGFloat(Double.pi / 2.0), clockwise: false)
path.addArc(center: CGPoint(x: bottomLeftCenterX, y: bottomLeftCenterY), radius: cornersRadius.bottomLeft, startAngle: CGFloat(Double.pi / 2.0), endAngle: CGFloat(Double.pi), clockwise: false)
path.closeSubpath()
return path
}
使用
let subView = UIView(frame: CGRect(x: 80, y: 230, width: 300, height: 80))
let shapLayer = CAShapeLayer()
let cornersRadius = CornersRadius(topLeft: 30, topRight: 10, bottomLeft: 0, bottomRight: 10)
shapLayer.path = createPath(bounds: subView.bounds, cornersRadius: cornersRadius)
subView.layer.mask = shapLayer
subView.backgroundColor = UIColor.gray
效果展示：
屏幕快照
