ios UIButton部分圆角

我用的是Masonry布局.
我想绘制如箭头所示的部分圆角按钮.请问用代码怎么实现?

在哪个方法里面写?

code:

//部分圆角按钮
    UIButton *loggedBtn = [[UIButton alloc]init];
    loggedBtn.backgroundColor = [UIColor blueColor];
    
    [headView addSubview:loggedBtn];
    [loggedBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.offset(40);
        make.height.offset(20);
        make.right.equalTo(headView);
        make.centerY.equalTo(headView);
    }];

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我直接把我代码给你，你看一下应该就知道怎么修改我的代码实现你要的效果啦

- (void)setupCornerRadius
{
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.musicChooseView.bounds
                                                   byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight
                                                         cornerRadii:CGSizeMake(12, 12)];
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
    maskLayer.frame = self.musicChooseView.bounds;
    maskLayer.path = maskPath.CGPath;
    self.musicChooseView.layer.mask = maskLayer;
}

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直接找一张,部分圆角的图片不就可以了?

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可以程序员改，不过我觉得最简单的方式是让美工直接提供就好了。没必要在这个问题上折腾程序员，嘿嘿

---

修改button的layer就可以了。改为你想要的圆角，再加上背景颜色。layer里面有这些API，你可以看一下。

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 //部分圆角按钮
    UIButton *loggedBtn = [[UIButton alloc]init];
    loggedBtn.backgroundColor = [UIColor blueColor];
    loggedBtn.layer.cornerRadius = 10;

    UIEdgeInsets padding = UIEdgeInsetsMake(10, 10, 10, 10);

    [self.view addSubview:loggedBtn];
    [loggedBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.offset(80);
        make.height.offset(20);
        make.right.equalTo(self.view.mas_right).with.offset(padding.right);
        make.centerY.equalTo(self.view);
    }];