Specifies the border rounded corner and the border rounded corner.

Specifies the border rounded corner and the border rounded corner.

Some boundaries of some views need to be set as rounded corners in recent projects. For example, to specify a rectangular view, you need to set its left to a circular shape. Therefore, a class is encapsulated to implement the rounded corner of the specified border.

1. First create a category that inherits from UIView (Btn is named because I need to set a button rounded corner in the Project)

 

2. Set the interface in the interface file

Here parameter: distance is the height or width of the boundary of the rounded corner.

#import <UIKit/UIKit.h>typedef enum {    ZSSideRoundLeft,    ZSSideRoundRight,    ZSSideRoundUp,    ZSSideRoundDown} ZSSideRound;@interface UIView (ZSSideRoundBtn)- (void)roundSide:(ZSSideRound)side distance:(CGFloat)distance;@end

 

 

3. Implement in. m (set the boundary to semi-circle here)

# Import "UIView + ZSSideRoundBtn. h "@ implementation UIView (ZSSideRoundBtn)-(void) roundSide :( ZSSideRound) side distance :( CGFloat) distance {UIBezierPath * maskPath; if (side = ZSSideRoundLeft) {maskPath = [UIBezierPath bezierPathWithRoundedRect: self. bounds byRoundingCorners :( UIRectCornerTopLeft | percent) cornerRadii: CGSizeMake (distance/2, distance/2)];} else if (side = percent) {maskPath = [UIBezierPath limit: self. bounds byRoundingCorners :( alert | UIRectCornerBottomRight) cornerRadii: CGSizeMake (distance/2, distance/2)];} else if (side = signature) {maskPath = [UIBezierPath handle: self. bounds byRoundingCorners :( UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii: CGSizeMake (distance/2, distance/2)];} else {maskPath = [UIBezierPath self. bounds byRoundingCorners :( UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii: CGSizeMake (distance/2, distance/2)];} // create a shape layer, set its path to CAShapeLayer * maskLayer = [CAShapeLayer layer]; maskLayer. frame = self. bounds; maskLayer. path = maskPath. CGPath; // the newly created shape layer is set as the mask self of the Image view layer. layer. mask = maskLayer; [self. layer setMasksToBounds: YES];} @ end

 

 

After that, you need to set the boundary of some subclass views of the UIView to semi-circle.