使 UIView 的特定角变圆 [英] Make specific corners of UIView round

问题描述

我做了一些研究，我明白了，没有简单的方法可以使仅 UIView 的右上角和左上角变成圆形，对吗?

I did a bit of research, and I see, there is no easy way to make only top right and top left corners of the UIView round, right?

ps.此代码使所有 4 个角都变圆，这很简单.我不要.

ps. This code makes all 4 corners round which is smth. I don't want.

  #import <QuartzCore/QuartzCore.h>

 self.layer.cornerRadius = 5;
 self.layer.masksToBounds = YES;

推荐答案

你可以用这个片段来做到:

You can do it with this snippet:

// Set top right & left corners
[self setMaskTo:yourView byRoundingCorners:UIRectCornerTopLeft|UIRectCornerTopRight];

编辑

对不起，我忘记了

- (void)setMaskTo:(UIView*)view byRoundingCorners:(UIRectCorner)corners
{
    UIBezierPath *rounded = [UIBezierPath bezierPathWithRoundedRect:view.bounds
                                                  byRoundingCorners:corners
                                                        cornerRadii:CGSizeMake(8.0, 8.0)];
    CAShapeLayer *shape = [[CAShapeLayer alloc] init];
    [shape setPath:rounded.CGPath];    
    view.layer.mask = shape;
}

PS:正如我在评论中所说，如果你在显示 UITableViewCell 单元格时使用这样的东西，我发现使用背景图像总是更好的选择，因为这种绘图的东西总是会影响性能.

PS: as I said in the comment, if you use things like this when displaying UITableViewCell cells, I've found that it's always a better choice to use background images because this kind of drawing stuff always affects performance.

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