iOS 设置View的单个边的Border

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interfaceUIView(GJWUnilateralBorder)

@property (nonatomic) CGFloat height;

@property (nonatomic) CGFloat width;

-(void)setViewBorderWithTop:(BOOL)top

                   Left:(BOOL)left

                 Bottom:(BOOL)bottom

                  Right:(BOOL)right

            BorderColor:(UIColor*)borderColor

            BorderWidth:(CGFloat)borderWidth;

@end

NS_ASSUME_NONNULL_END

#import "UIView+GJWUnilateralBorder.h"

@implementationUIView(GJWUnilateralBorder)

- (void)setHeight:(CGFloat)height{

    CGRectframe =self.frame;

    frame.size.height= height;

    self.frame= frame;

}

- (CGFloat)height{

    return self.frame.size.height;

}

- (void)setWidth:(CGFloat)width{

    CGRectframe =self.frame;

    frame.size.width= width;

    self.frame= frame;

}

- (CGFloat)width{

    return self.frame.size.width;

}

-(void)setViewBorderWithTop:(BOOL)topLeft:(BOOL)leftBottom:(BOOL)bottomRight:(BOOL)rightBorderColor:(UIColor*)borderColorBorderWidth:(CGFloat)borderWidth{

    if(top) {

        CALayer*topBorder = [CALayerlayer];

        topBorder.frame=CGRectMake(0,0,self.width, borderWidth *1.5);

        topBorder.backgroundColor= borderColor.CGColor;

        [self.layeraddSublayer:topBorder];

    }

    if(left) {

        CALayer*leftBorder = [CALayerlayer];

        leftBorder.frame=CGRectMake(0,0, borderWidth *1.5,self.height);

        leftBorder.backgroundColor= borderColor.CGColor;

        [self.layeraddSublayer:leftBorder];

    }

    if(bottom) {

        CALayer*bottomBorder = [CALayerlayer];

        bottomBorder.frame=CGRectMake(0,self.height- borderWidth *1.5,self.width, borderWidth *1.5);

        bottomBorder.backgroundColor= borderColor.CGColor;

        [self.layeraddSublayer:bottomBorder];

    }

    if(right) {

        CALayer*rightBorder = [CALayerlayer];

        rightBorder.frame=CGRectMake(self.width- borderWidth *1.5,0, borderWidth *1.5,self.height);

        rightBorder.backgroundColor= borderColor.CGColor;

        [self.layeraddSublayer:rightBorder];

    }

}