如何设置cornerRadius仅UIView的左上角和右上角？ [英] how to set cornerRadius for only top-left and top-right corner of a UIView?

问题描述

有没有办法只为UIView的左上角和右上角设置cornerRadius？

Is there a way to set cornerRadius for only top-left and top-right corner of a UIView?

编辑：

我试过下面的，但它最终没有看到视图了。下面的代码有什么问题？

I tried the following, but it end up not seeing the view anymore. Anything wrong with the code below?

UIView *view = [[UIView alloc] initWithFrame:frame];

CALayer *layer = [CALayer layer];
UIBezierPath *shadowPath = [UIBezierPath bezierPathWithRoundedRect:frame byRoundingCorners:(UIRectCornerTopLeft|UIRectCornerTopRight) cornerRadii:CGSizeMake(3.0, 3.0)];
layer.shadowPath = shadowPath.CGPath;
view.layer.mask = layer;

推荐答案

Swift代码示例： http://stackoverflow.com/a/35621736/308315

Swift code example here: http://stackoverflow.com/a/35621736/308315

不直接。您必须：

1. 创建 CAShapeLayer


2. 基于 view.bounds 将路径设置为 CGPathRef code>，但只有两个圆角（可能使用 + [UIBezierPath bezierPathWithRoundedRect：byRoundingCorners：cornerRadii：] ）


3. 将 view.layer.mask 设为 CAShapeLayer

1. Create a CAShapeLayer
2. Set its path to be a CGPathRef based on view.bounds but with only two rounded corners (probably by using +[UIBezierPath bezierPathWithRoundedRect:byRoundingCorners:cornerRadii:])
3. Set your view.layer.mask to be the CAShapeLayer

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