Question

有没有办法只为UILabel的右上角和右下角设置cornerRadius？

我尝试了以下内容，但它根本无法正常工作，并且我没有使用下面的代码获得预期的输出。如果需要，我可以在我的代码中修改吗？

 UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:lblCollectPaymentAmount.bounds
                                               byRoundingCorners:(UIRectCornerTopRight | UIRectCornerBottomRight)
                                                     cornerRadii:CGSizeMake(5.0, 5.0)];

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = lblCollectPaymentAmount.bounds;
maskLayer.path = maskPath.CGPath;
lblCollectPaymentAmount.layer.mask = maskLayer;
lblCollectPaymentAmount.layer.masksToBounds = YES;

Answer 1

@drashti：

它可能对你有帮助：

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

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

Answer 2

IOS 11中出现了maskedCorners属性。

Answer 3

Apple从iOS 11及更高版本引入了maskedCorners属性，非常方便。

    lbl.clipsToBounds = true
    lbl.layer.cornerRadius = 10
    lbl.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
    //You can give an array for .layerMinXMinYCorner, .layerMaxXMinYCorner, .layerMinXMaxYCorner and .layerMaxXMaxYCorner to give all corner a radius.

您还可以为标签声明IBDesignable类。

@IBDesignable
class CornerLable: UILabel {
    @IBInspectable var cornerRadius:CGFloat = 10

    override func layoutSubviews() {
        layer.cornerRadius = cornerRadius
        layer.maskedCorners = [.layerMinXMinYCorner,.layerMaxXMinYCorner, .layerMinXMaxYCorner, .layerMaxXMaxYCorner]
    }
}

不要忘记在情节提要或代码中clipsToBounds = true。

希望有帮助。

为UILabel设置圆角

3 个答案: