如何为UIView的左下角，右下角和左上角设置cornerRadius？

有没有办法为UIView的左下角，右下角和左上角设置cornerRadius？如何为UIView的左下角，右下角和左上角设置cornerRadius？

我尝试了以下方法，但最终导致视图消失。下面的代码有什么问题吗？

UIBezierPath *maskPath; 
    maskPath = [UIBezierPath bezierPathWithRoundedRect:view.bounds byRoundingCorners:(UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(20.0, 20.0)]; 
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; 
    maskLayer.path = maskPath.CGPath; 
    view.layer.mask = maskLayer;

来源

2014-09-02 Siva

尝试使用'UIBezierPath * maskPath = [UIBezierPath新];'然后用'addLineToPoint：'，'addArcWithCenter：半径：由startAngle：endAngle：顺时针方向：'方法。 – 2014-09-02 05:42:23

你的代码似乎没问题。只需检查您是否添加了QuartzCore框架并在您正在编写此代码的类中导入。我不知道情况确实如此，但早些时候发生在我身上。 – 2014-09-02 06:22:31

可能的重复[Rounded UIView使用CALayers - 只有一些角落 - 如何？]（http://stackoverflow.com/questions/2264083/round-uiview-using-calayers-only-some-corners-how） – Stuart 2014-09-02 06:34:53

113

你可以这样说：

UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.viewOutlet.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(10.0, 10.0)]; 

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; 
maskLayer.frame = self.view.bounds; 
maskLayer.path = maskPath.CGPath; 
self.viewOutlet.layer.mask = maskLayer;

enter image description here

更新：
如果您需要边框只需创建另一个CAShapeLayer并将其添加到视图的图层作为子图层。像这样（的地方下面上的代码的代码）：

CAShapeLayer *borderLayer = [[CAShapeLayer alloc] init]; 
borderLayer.frame = self.view.bounds; 
borderLayer.path = maskPath.CGPath; 
borderLayer.lineWidth = 4.0f; 
borderLayer.strokeColor = [UIColor blackColor].CGColor; 
borderLayer.fillColor = [UIColor clearColor].CGColor; 

[self.viewOutlet.layer addSublayer:borderLayer];

enter image description here

在SWIFT 3.0这样的：

let maskPath = UIBezierPath.init(roundedRect: self.viewOutlet.bounds, byRoundingCorners:[.topLeft, .bottomLeft], cornerRadii: CGSize.init(width: 10.0, height: 10.0)) 
let maskLayer = CAShapeLayer() 
maskLayer.frame = self.viewOutlet.bounds 
maskLayer.path = maskPath.cgPath 
self.viewOutlet.layer.mask = maskLayer

来源

2014-09-02 06:04:36

这里我需要设置边界为这个看法...是否有可能显示边界？ – Siva 2014-09-02 09:30:43

@Ssn看看更新的答案 – 2014-09-02 10:27:20

谢谢。工作得很好。 – fozoglu 2015-07-14 11:19:04

您错过了添加UIRectCornerTopLeft。请试试这个代码：

UIRectCorner rectCorner = UIRectCornerTopLeft | UIRectCornerBottomLeft | UIRectCornerBottomRight; 

UIBezierPath *maskPath; 
maskPath = [UIBezierPath bezierPathWithRoundedRect:view.bounds 
           byRoundingCorners:rectCorner 
             cornerRadii:CGSizeMake(20.0, 20.0)]; 

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; 
maskLayer.path = maskPath.CGPath; 
view.layer.mask = maskLayer; 
view.layer.masksToBounds = YES;

可能会有所帮助....

来源

2014-09-02 06:02:42

复制从http ：//stackoverflow.com/questions/10167266/how-to-set-cornerradius-for-only-top-left-and-top-right-corner-of-a-uiview？rq = 1 – boeqqsh 2014-09-02 06:04:56

使用自定义UIView与实现下面的代码

#import "CustomUIView.h" 

@implementation CustomView 

- (void)drawRect:(CGRect)rect 
{ 
    // Drawing code 
    CAShapeLayer * maskLayer = [CAShapeLayer layer]; 
    maskLayer.path = [UIBezierPath bezierPathWithRoundedRect: self.bounds byRoundingCorners: UIRectCornerTopLeft | UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii: (CGSize){20.0, 20.0}].CGPath; 

    self.layer.mask = maskLayer; 
} 

@end

输出：

enter image description here

看那UIBezierPath.h选项：

typedef NS_OPTIONS(NSUInteger, UIRectCorner) { 
    UIRectCornerTopLeft  = 1 << 0, 
    UIRectCornerTopRight = 1 << 1, 
    UIRectCornerBottomLeft = 1 << 2, 
    UIRectCornerBottomRight = 1 << 3, 
    UIRectCornerAllCorners = ~0UL 
};

来源

2014-09-02 06:05:56

希望这将帮助你

你我的机器上运行完美上面的代码，可能是你设置CAShapeLayer帧等于你的看法由于你的观点将消失，但我没有看到你的代码中的这一行，所以请检查您的视图属性，并应用下面的代码

UIBezierPath *maskPath; 
    maskPath = [UIBezierPath bezierPathWithRoundedRect:viewName.bounds 
            byRoundingCorners:(UIRectCornerBottomLeft | UIRectCornerBottomRight |UIRectCornerTopLeft) 
              cornerRadii:CGSizeMake(20.0, 20.0)]; 
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; 
    maskLayer.frame =viewName.bounds; 
    maskLayer.path = maskPath.CGPath; 
    viewName.layer.mask = maskLayer;

来源

2014-09-02 06:16:37

我知道这是很晚了，但我只是创建一个方法，你可以只传递一个或多个UIRectCorners。

[self setMaskTo:myView byRoundingCorners:(UIRectCornerTopLeft|UIRectCornerTopRight)]; 

- (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; 
    }

来源

2015-04-23 08:26:50

UIBezierPath *maskPath; 
maskPath = [UIBezierPath bezierPathWithRoundedRect:someView.bounds 
          byRoundingCorners:(UIRectCornerTopLeft|UIRectCornerTopRight|UIRectCornerBottomLeft|UIRectCornerBottomRight) 
            cornerRadii:CGSizeMake(10.0,10.0,5.0, 10.0)]; 


CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; 
maskLayer.frame = self.bounds; 
maskLayer.path = maskPath.CGPath; 
someView.layer.mask = maskLayer;

来源

2016-01-02 06:08:55

试试这个代码

-(void)setMaskTo:(UIView*)view byRoundingCorners:(UIRectCorner)corners { 
    UIBezierPath* rounded = [UIBezierPath bezierPathWithRoundedRect:view.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(10.0, 10.0)]; 
    CAShapeLayer* shape = [[CAShapeLayer alloc] init]; 
    [shape setPath:rounded.CGPath]; 
    view.layer.mask = shape; 
}

使用呼叫

[self setMaskTo:myView byRoundingCorners:UIRectCornerTopLeft|UIRectCornerTopRight];

可用选项：

UIRectCornerTopLeft, UIRectCornerTopRight,UIRectCornerBottomLeft,UIRectCornerBottomRight,UIRectCornerAllCorners

来源

2016-03-12 13:01:29

设置角半径的图Swift

层的创建和掩蔽应从UIView

override func drawRect(rect: CGRect) { 
     super.drawRect(rect) 

     let maskPath = UIBezierPath(roundedRect: self.view.bounds, byRoundingCorners: [.TopLeft, .BottomLeft, .BottomRight], cornerRadii: CGSizeMake(10, 10)) 
     let maskLayer = CAShapeLayer() 
     maskLayer.frame = self.view.bounds 
     maskLayer.path = maskPath.CGPath 
     self.view.layer.mask = maskLayer 
    }

来源

2016-03-17 22:08:09 metpb

继承了可选drawRect()块内运行测试在xcode的8和swift 3

extension UIView { 
    func roundCorners(corners:UIRectCorner, radius: CGFloat) { 
     let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) 
     let mask = CAShapeLayer() 
     mask.path = path.cgPath 
     self.layer.mask = mask 
    } 
}

而且使用这样

YourView.roundCorners([.topLeft, .bottomLeft], radius: 10)

来源

2016-12-19 07:38:54

使用的角度验证码圆角半径只有两个sides.after很长一段时间，我得到的建议IOS。这里viewFilter是我们想要四舍五入的视图插座。

-(void) viewDidAppear:(BOOL)animated{ 
[super viewDidAppear:animated]; 
[self setMaskTo:viewFilter byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight]; 
} 

-(void)setMaskTo:(UIView*)view byRoundingCorners:(UIRectCorner)corners{ 

UIBezierPath *rounded = [UIBezierPathbezierPathWithRoundedRect:view.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(20.0, 20.0)]; 

CAShapeLayer *shape = [[CAShapeLayer alloc] init]; 
shape.frame = self.view.bounds; 
[shape setPath:rounded.CGPath]; 
view.layer.mask = shape; 
}

来源

2017-08-31 15:38:08

在iOS 11上，你只需要的是maskedCorners。

let cornerRadius: CGFloat = 6.0 
    if #available(iOS 11, *) { 
     productImageView.layer.cornerRadius = cornerRadius 
     productImageView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner] 

    } else { 
     let path  = UIBezierPath(roundedRect: bounds, byRoundingCorners: [.topLeft , .topRight], cornerRadii:CGSize(width: cornerRadius, height: cornerRadius)) 
     let maskLayer = CAShapeLayer() 
     maskLayer.frame = bounds 
     maskLayer.path = path.cgPath 
     productImageView.mask    = maskLayer 
     productImageView.layer.masksToBounds = true 
    }

来源

2018-01-14 01:10:27 nilotic

如何为UIView的左下角，右下角和左上角设置cornerRadius？

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