快速创build一个只有两个圆angular的矩形？

我需要在swift中创build一个只有两个圆angular的矩形（Objective C代码也可以）。

目前我的代码正在创build两个矩形

CGPathCreateWithRoundedRect(CGRectMake(0, 0, 30, 60), 5, 5, nil); 

和

 CGPathCreateWithRoundedRect(CGRectMake(0, 0, 30, 60), 0, 0, nil); 

并合并它们（有两个直angular和两个圆angular的），但是我对代码不满意，我很确定应该有更好的方法来做到这一点。

我是新来的iOS和graphics开发和迅速。

Answer 1

在Swift 2.3中你可以这样做

 let maskPath = UIBezierPath(roundedRect: anyView.bounds, byRoundingCorners: [.BottomLeft, .BottomRight], cornerRadii: CGSize(width: 10.0, height: 10.0)) let shape = CAShapeLayer() shape.path = maskPath.CGPath view.layer.mask = shape 

---

在Objective-C中，您可以使用UIBezierPath类方法

 bezierPathWithRoundedRect:byRoundingCorners:cornerRadii: 

示例实现 –

 // set the corner radius to the specified corners of the passed container - (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; } 

并调用上面的方法as-

 [self setMaskTo:anyView byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight]; 

Answer 2

这里有一个快速的Swift 3扩展，你可以使用它进行舍入和可选的边界。

请注意：如果您使用的是自动布局，则可能需要在视图生效后调用此视图，例如viewDidLayoutSubviews或layoutSubviews 。

 import UIKit extension UIView { /** Rounds the given set of corners to the specified radius - parameter corners: Corners to round - parameter radius: Radius to round to */ func round(corners: UIRectCorner, radius: CGFloat) { _ = _round(corners: corners, radius: radius) } /** Rounds the given set of corners to the specified radius with a border - parameter corners: Corners to round - parameter radius: Radius to round to - parameter borderColor: The border color - parameter borderWidth: The border width */ func round(corners: UIRectCorner, radius: CGFloat, borderColor: UIColor, borderWidth: CGFloat) { let mask = _round(corners: corners, radius: radius) addBorder(mask: mask, borderColor: borderColor, borderWidth: borderWidth) } /** Fully rounds an autolayout view (eg one with no known frame) with the given diameter and border - parameter diameter: The view's diameter - parameter borderColor: The border color - parameter borderWidth: The border width */ func fullyRound(diameter: CGFloat, borderColor: UIColor, borderWidth: CGFloat) { layer.masksToBounds = true layer.cornerRadius = diameter / 2 layer.borderWidth = borderWidth layer.borderColor = borderColor.cgColor; } } private extension UIView { @discardableResult func _round(corners: UIRectCorner, radius: CGFloat) -> CAShapeLayer { let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let mask = CAShapeLayer() mask.path = path.cgPath self.layer.mask = mask return mask } func addBorder(mask: CAShapeLayer, borderColor: UIColor, borderWidth: CGFloat) { let borderLayer = CAShapeLayer() borderLayer.path = mask.path borderLayer.fillColor = UIColor.clear.cgColor borderLayer.strokeColor = borderColor.cgColor borderLayer.lineWidth = borderWidth borderLayer.frame = bounds layer.addSublayer(borderLayer) } } 

Answer 3

这里是你在Swift 2.0中所做的

 var maskPath = UIBezierPath(roundedRect: anyView.bounds, byRoundingCorners: [.BottomLeft, .BottomRight], cornerRadii: CGSize(width: 10.0, height: 10.0)) 

Answer 4

build立在Sanjay的优秀答案之上，我为Swift 2.3写了一个快速的CALayer扩展，以防止你不止一次地做这种“只有一些angular落”的事情。

 extension CALayer { func roundCorners(corners: UIRectCorner, radius: CGFloat) { let maskPath = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let shape = CAShapeLayer() shape.path = maskPath.CGPath mask = shape } } 

用法：

 myView.layer.roundCorners([.TopLeft, .TopRight], radius: myCornerRadius) 

Swift 3.0（在这个例子中，边界来自视图而不是来自图层，使用视图边界使这个代码在UITableViewCell中使用视图）：

 func roundCorners(corners: UIRectCorner, radius: CGFloat, viewBounds: CGRect) { let maskPath = UIBezierPath(roundedRect: viewBounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let shape = CAShapeLayer() shape.path = maskPath.cgPath mask = shape } 

用法：

 myView.layer.roundCorners(corners: [.topLeft, .topRight], radius: myCornerRadius, viewBounds: bounds) 

Answer 5

Swift 3 – 有用的UIView扩展当你需要舍入一些视图的特定angular落：

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

那么就像这样使用它：

 someView.round(corners: [.topLeft, .topRight], radius: 5) 

Answer 6

2017年…

 @IBDesignable class RoundedEnds: UIView { override func layoutSubviews() { setup() } // "layoutSubviews" is best func setup() { let r = self.bounds.size.height / 2 let path = UIBezierPath(roundedRect: self.bounds, cornerRadius:r) let mask = CAShapeLayer() mask.path = path.cgPath self.layer.mask = mask } } 

只有一些angular落，只需改变：

 roundedRect: self.bounds, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: r, height: r) 

请注意，像往常一样，在Swift中有很多小的变化，例如常量的大写等等。

Answer 7

Objective-C版本的iWasRobbed的答案：

UIView的+ RoundCorners.h

 #import <UIKit/UIKit.h> @interface UIView (RoundCorners) /** Rounds the given set of corners to the specified radius - parameter corners: Corners to round - parameter radius: Radius to round to */ - (void)roundCorners:(UIRectCorner)corners radius:(CGFloat)radius; /** Rounds the given set of corners to the specified radius with a border - parameter corners: Corners to round - parameter radius: Radius to round to - parameter borderColor: The border color - parameter borderWidth: The border width */ - (void)roundCorners:(UIRectCorner)corners radius:(CGFloat)radius borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth; /** Fully rounds an autolayout view (eg one with no known frame) with the given diameter and border - parameter diameter: The view's diameter - parameter borderColor: The border color - parameter borderWidth: The border width */ - (void)fullyRoundWithDiameter:(CGFloat)diameter borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth; @end 

UIView的+ RoundCorners.m

 #import "UIView+RoundCorners.h" @implementation UIView (RoundCorners) - (void)roundCorners:(UIRectCorner)corners radius:(CGFloat)radius { [self _roundCorners:corners radius:radius]; } - (void)roundCorners:(UIRectCorner)corners radius:(CGFloat)radius borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth { CAShapeLayer *mask = [self _roundCorners:corners radius:radius]; [self addBorderWithMask:mask borderColor:borderColor borderWidth:borderWidth]; } - (void)fullyRoundWithDiameter:(CGFloat)diameter borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth { self.layer.masksToBounds = YES; self.layer.cornerRadius = diameter / 2; self.layer.borderWidth = borderWidth; self.layer.borderColor = borderColor.CGColor; } - (CAShapeLayer *)_roundCorners:(UIRectCorner)corners radius:(CGFloat)radius { UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(radius, radius)]; CAShapeLayer *mask = [CAShapeLayer layer]; mask.path = path.CGPath; self.layer.mask = mask; return mask; } - (void)addBorderWithMask:(CAShapeLayer *)mask borderColor:(UIColor *)borderColor borderWidth:(CGFloat)borderWidth { CAShapeLayer *borderLayer = [CAShapeLayer layer]; borderLayer.path = mask.path; borderLayer.fillColor = UIColor.clearColor.CGColor; borderLayer.strokeColor = borderColor.CGColor; borderLayer.lineWidth = borderWidth; borderLayer.frame = self.bounds; [self.layer addSublayer:borderLayer]; } @end 

Answer 8

更新了iWasRobbed与Swift 3.0 GM版本配合使用的答案：

 import UIKit extension UIView { /** Rounds the given set of corners to the specified radius - parameter corners: Corners to round - parameter radius: Radius to round to */ func round(corners: UIRectCorner, radius: CGFloat) { _round(corners: corners, radius: radius) } /** Rounds the given set of corners to the specified radius with a border - parameter corners: Corners to round - parameter radius: Radius to round to - parameter borderColor: The border color - parameter borderWidth: The border width */ func round(corners: UIRectCorner, radius: CGFloat, borderColor: UIColor, borderWidth: CGFloat) { let mask = _round(corners: corners, radius: radius) addBorder(mask: mask, borderColor: borderColor, borderWidth: borderWidth) } /** Fully rounds an autolayout view (eg one with no known frame) with the given diameter and border - parameter diameter: The view's diameter - parameter borderColor: The border color - parameter borderWidth: The border width */ func fullyRound(diameter: CGFloat, borderColor: UIColor, borderWidth: CGFloat) { layer.masksToBounds = true layer.cornerRadius = diameter / 2 layer.borderWidth = borderWidth layer.borderColor = borderColor.cgColor; } } private extension UIView { @discardableResult func _round(corners: UIRectCorner, radius: CGFloat) -> CAShapeLayer { let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)) let mask = CAShapeLayer() mask.path = path.cgPath self.layer.mask = mask return mask } func addBorder(mask: CAShapeLayer, borderColor: UIColor, borderWidth: CGFloat) { let borderLayer = CAShapeLayer() borderLayer.path = mask.path borderLayer.fillColor = UIColor.clear.cgColor borderLayer.strokeColor = borderColor.cgColor borderLayer.lineWidth = borderWidth borderLayer.frame = bounds layer.addSublayer(borderLayer) } } 

Answer 9

Swift 4：

  let maskPath = UIBezierPath(roundedRect: view.bounds, byRoundingCorners: [.allCorners], cornerRadii: CGSize(width: 10.0, height: 10.0)) let shape = CAShapeLayer() shape.path = maskPath.cgPath cell.layer.mask = shape return cell