使UIView的特定角落成圆形 [英] Make specific corners of UIView round

问题描述

我做了一些研究，我发现，没有简单的方法可以让
仅在UIView回合的右上角和左上角，对吗？

ps。这段代码使得所有4个角都是圆形的。我不想要。

  #import< QuartzCore / QuartzCore.h> 
 
 self.layer.cornerRadius = 5; 
 self.layer.masksToBounds = YES; 
  

解决方案

您可以使用此代码段执行此操作：

  //设置右上角&左角
 [self setMaskTo：yourView byRoundingCorners：UIRectCornerTopLeft | UIRectCornerTopRight]; 
  

编辑

<抱歉，我忘了这个

   - （void）setMaskTo：（UIView *）view byRoundingCorners：（UIRectCorner）corner 
 {
 UIBezierPath * rounded = [UIBezierPath bezierPathWithRoundedRect：view.bounds 
 byRoundingCorners：corner 
 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，如果你使用这样的东西，显示 UITableViewCell 单元格，我发现使用背景图像总是更好的选择，因为这种绘图材料总会影响性能。

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. 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;

解决方案

You can do it with this snippet:

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

EDIT

Sorry, I forgot this

- (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: 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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