UIbutton 单独设置某一个或两个圆角

直接上代码

    UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button setTitle:@"点我啊" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor redColor];
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:button.bounds byRoundingCorners:UIRectCornerBottomLeft|UIRectCornerBottomRight cornerRadii:CGSizeMake(10.0, 10.0)];
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = button.bounds;
    maskLayer.path = maskPath.CGPath;
    button.layer.mask = maskLayer;
    
    [self.view addSubview:button];