视图上的圆角

Question

我使用以下方法在我的应用程序中的视图上获得圆角：

(objective-c:)
hoursTable.layer.cornerRadius = 5.0;
[hoursTable setClipsToBounds:YES];

(my actual code is in rubymotion:)
self.view.layer.cornerRadius = 10
self.view.layer.masksToBounds = true

现在该视图的所有角都是10pt的圆角，我如何仅在左上角和右上角应用效果并保持左下角和右下角的平方？

Answer 1

我在UIView上有这个代码的类别：

- (void)setRoundedCorners:(UIRectCorner)corners radius:(CGSize)size {
UIBezierPath* maskPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:corners cornerRadii:size];

CAShapeLayer* maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = self.bounds;
maskLayer.path = maskPath.CGPath;

self.layer.mask = maskLayer;
[maskLayer release];
}

如果使用ARC，请删除最后一行。

使用示例：

[hoursTable setRoundedCorners:UIRectCornerTopLeft|UIRectCornerTopRight radius:CGSizeMake(5.0, 5.0)];

Answer 2

尝试手动创建路径

CAShapeLayer* shape = [CAShapeLayer layer];
CGMutablePathRef path = CGPathCreateMutable();
/*...*/
CGPathMoveToPoint(path, NULL, 0, 0);
/*create path for view*/

shape.path = path;
CGPathRelease(path);
view.layer.mask = shape;