如何只为左下角，右下角和左上角的textview设置cornerRadius？

小编典典

如何只为左下角，右下角和左上角的textview设置cornerRadius？

swift

如何仅将角半径设置为仅左下角，右下角和左上角textview？

let rectShape = CAShapeLayer()
    rectShape.backgroundColor = UIColor.redColor().CGColor
    rectShape.bounds = messages.frame
    rectShape.position = messages.center
    rectShape.path = UIBezierPath(roundedRect: messages.bounds, byRoundingCorners: .BottomLeft | .TopRight, cornerRadii: CGSize(width: 20, height: 20)).CGPath

    messages.layer.addSublayer(rectShape)

此代码创建两个矩形。我不知道为什么。

阅读 574

2020-07-07

共1个答案

小编典典

您只需要遮罩该图层，如下所示：

对于Swift 3 ：

    let rectShape = CAShapeLayer()
    rectShape.bounds = self.myView.frame
    rectShape.position = self.myView.center
    rectShape.path = UIBezierPath(roundedRect: self.myView.bounds, byRoundingCorners: [.bottomLeft , .bottomRight , .topLeft], cornerRadii: CGSize(width: 20, height: 20)).cgPath

     self.myView.layer.backgroundColor = UIColor.green.cgColor
    //Here I'm masking the textView's layer with rectShape layer
     self.myView.layer.mask = rectShape

较低版本：

let rectShape = CAShapeLayer()
rectShape.bounds = self.myView.frame
rectShape.position = self.myView.center
rectShape.path = UIBezierPath(roundedRect: self.myView.bounds, byRoundingCorners: .BottomLeft | .BottomRight | .TopLeft, cornerRadii: CGSize(width: 20, height: 20)).CGPath

 self.myView.layer.backgroundColor = UIColor.greenColor().CGColor
//Here I'm masking the textView's layer with rectShape layer
 self.myView.layer.mask = rectShape

2020-07-07