Button UIImageVIew UIView UILabel 等控件设置一个圆角 或者多个

给控件设置圆角平时大家用的最多应该是layer.cornerRadius这个属性吧  但是这个属性设置成功后是4个角都是圆角类型的;

 现在控制器里创建一个imageVIew

     UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 100, 50)];
    imageView.backgroundColor=[UIColor redColor];
    [self.view addSubview:imageView];
　　　　

 在Healp.h 中 根据你的控件决定下边的红色字体的类型

/*
 适用于label imageView view
  */
+(void)viewBeizerRect:(CGRect)rect view:(UIView *)view  corner:(UIRectCorner)corner cornerRadii:(CGSize)radii;


/*
 适用于button
 */
+(void)ControlBeizerRect:(CGRect)rect Control:(UIControl *)Control  corner:(UIRectCorner)corner cornerRadii:(CGSize)radii;

在 Healp.m 中

/*
  适用于label imageView view
  */
+(void)viewBeizerRect:(CGRect)rect view:(UIView *)view corner:(UIRectCorner)corner cornerRadii:(CGSize)radii{
    UIBezierPath  *maskPath= [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:corner cornerRadii:radii];
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame =view.bounds;
    maskLayer.path = maskPath.CGPath;
    view.layer.mask = maskLayer;
}


/*
 适用于button
  */
+(void)ControlBeizerRect:(CGRect)rect Control:(UIControl *)Control  corner:(UIRectCorner)corner cornerRadii:(CGSize)radii{
    UIBezierPath  *maskPath= [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:corner cornerRadii:radii];
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame =Control.bounds;
    maskLayer.path = maskPath.CGPath;
    Control.layer.mask = maskLayer;
}

 然后在控制器里调用 

 [Healp viewBeizerRect:imageView.bounds view:imageView corner:UIRectCornerBottomRight cornerRadii:CGSizeMake(20, 20)];//设置一个角
 [Healp viewBeizerRect:imageVIew.bounds view:imageView corner:UIRectCornerBottomRight|UIRectCornerBottomLeft cornerRadii:CGSizeMake(20, 20)];//设置多个角

就可以了 

设置圆角的属性

typedef NS_OPTIONS(NSUInteger, UIRectCorner) {

    UIRectCornerTopLeft     = 1 << 0, 左上

    UIRectCornerTopRight    = 1 << 1,右上

    UIRectCornerBottomLeft  = 1 << 2,左下

    UIRectCornerBottomRight = 1 << 3,右下

    UIRectCornerAllCorners  = ~0UL 全角

};