就是看到搞笑图片就想和你们分享

iOS 创建一个内外角都有弧度的圆角button

   UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(2, 2, 100, 100)];
    btn.backgroundColor = [UIColor redColor];
    btn.layer.cornerRadius = 3;
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(99, 99, 104, 104)];
    view.backgroundColor = [UIColor blueColor];
    
    view.layer.cornerRadius = 3;
    [self.view addSubview:view];
    [view addSubview:btn];

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