iOS开发 给View添加指定位置的边框线

略微封装了一下，给View添加指定位置的边框线，其中位移枚举的使用询问了哥们儿，总算搞定；

封装一：直接封装成了一个方法

/// 边框类型(位移枚举)typedef NS_ENUM(NSInteger, UIBorderSideType) {    UIBorderSideTypeAll    = 0,    UIBorderSideTypeTop    = 1 << 0,    UIBorderSideTypeBottom = 1 << 1,    UIBorderSideTypeLeft   = 1 << 2,    UIBorderSideTypeRight  = 1 << 3,};/** 设置view指定位置的边框 @param originalView   原view @param color          边框颜色 @param borderWidth    边框宽度 @param borderType     边框类型 例子: UIBorderSideTypeTop|UIBorderSideTypeBottom @return  view */- (UIView *)borderForView:(UIView *)originalView color:(UIColor *)color borderWidth:(CGFloat)borderWidth borderType:(UIBorderSideType)borderType {        if (borderType == UIBorderSideTypeAll) {        originalView.layer.borderWidth = borderWidth;        originalView.layer.borderColor = color.CGColor;        return originalView;    }        /// 线的路径    UIBezierPath * bezierPath = [UIBezierPath bezierPath];        /// 左侧    if (borderType & UIBorderSideTypeLeft) {        /// 左侧线路径        [bezierPath moveToPoint:CGPointMake(0.0f, originalView.frame.size.height)];        [bezierPath addLineToPoint:CGPointMake(0.0f, 0.0f)];    }        /// 右侧    if (borderType & UIBorderSideTypeRight) {        /// 右侧线路径        [bezierPath moveToPoint:CGPointMake(originalView.frame.size.width, 0.0f)];        [bezierPath addLineToPoint:CGPointMake( originalView.frame.size.width, originalView.frame.size.height)];    }        /// top    if (borderType & UIBorderSideTypeTop) {        /// top线路径        [bezierPath moveToPoint:CGPointMake(0.0f, 0.0f)];        [bezierPath addLineToPoint:CGPointMake(originalView.frame.size.width, 0.0f)];    }        /// bottom    if (borderType & UIBorderSideTypeBottom) {        /// bottom线路径        [bezierPath moveToPoint:CGPointMake(0.0f, originalView.frame.size.height)];        [bezierPath addLineToPoint:CGPointMake( originalView.frame.size.width, originalView.frame.size.height)];    }      CAShapeLayer * shapeLayer = [CAShapeLayer layer];    shapeLayer.strokeColor = color.CGColor;    shapeLayer.fillColor  = [UIColor clearColor].CGColor;    /// 添加路径    shapeLayer.path = bezierPath.CGPath;    /// 线宽度    shapeLayer.lineWidth = borderWidth;        [originalView.layer addSublayer:shapeLayer];        return originalView;}

封装二：封装成了类别

.h内容

#import <UIKit/UIKit.h>typedef NS_OPTIONS(NSUInteger, UIBorderSideType) {    UIBorderSideTypeAll  = 0,    UIBorderSideTypeTop = 1 << 0,    UIBorderSideTypeBottom = 1 << 1,    UIBorderSideTypeLeft = 1 << 2,    UIBorderSideTypeRight = 1 << 3,};@interface UIView (BorderLine)- (UIView *)borderForColor:(UIColor *)color borderWidth:(CGFloat)borderWidth borderType:(UIBorderSideType)borderType;@end

.m内容

#import "UIView+BorderLine.h"@implementation UIView (BorderLine)- (UIView *)borderForColor:(UIColor *)color borderWidth:(CGFloat)borderWidth borderType:(UIBorderSideType)borderType {        if (borderType == UIBorderSideTypeAll) {        self.layer.borderWidth = borderWidth;        self.layer.borderColor = color.CGColor;        return self;    }            /// 左侧    if (borderType & UIBorderSideTypeLeft) {        /// 左侧线路径        [self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.f, 0.f) toPoint:CGPointMake(0.0f, self.frame.size.height) color:color borderWidth:borderWidth]];    }        /// 右侧    if (borderType & UIBorderSideTypeRight) {        /// 右侧线路径        [self.layer addSublayer:[self addLineOriginPoint:CGPointMake(self.frame.size.width, 0.0f) toPoint:CGPointMake( self.frame.size.width, self.frame.size.height) color:color borderWidth:borderWidth]];    }        /// top    if (borderType & UIBorderSideTypeTop) {        /// top线路径        [self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.0f, 0.0f) toPoint:CGPointMake(self.frame.size.width, 0.0f) color:color borderWidth:borderWidth]];    }        /// bottom    if (borderType & UIBorderSideTypeBottom) {        /// bottom线路径        [self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.0f, self.frame.size.height) toPoint:CGPointMake( self.frame.size.width, self.frame.size.height) color:color borderWidth:borderWidth]];    }        return self;}- (CAShapeLayer *)addLineOriginPoint:(CGPoint)p0 toPoint:(CGPoint)p1 color:(UIColor *)color borderWidth:(CGFloat)borderWidth {    /// 线的路径    UIBezierPath * bezierPath = [UIBezierPath bezierPath];    [bezierPath moveToPoint:p0];    [bezierPath addLineToPoint:p1];        CAShapeLayer * shapeLayer = [CAShapeLayer layer];    shapeLayer.strokeColor = color.CGColor;    shapeLayer.fillColor  = [UIColor clearColor].CGColor;    /// 添加路径    shapeLayer.path = bezierPath.CGPath;    /// 线宽度    shapeLayer.lineWidth = borderWidth;    return shapeLayer;}@end

用法：

UIView *testView = [[UIView alloc] initWithFrame:CGRectMake(80.0f, 80.0f, 200.0f, 100.0f)];    testView.backgroundColor = [UIColor lightGrayColor];    [self.view addSubview:testView];    [self borderForView:testView color:[UIColor redColor] borderWidth:1.0f borderType:UIBorderSideTypeTop | UIBorderSideTypeBottom];

效果：

不足之处,边框线过宽的话，交界处会有留白；
ps:注意，需要先把你的view加载在父view上，[self.view addSubview:testView]; 之后再设置边框；否则可能会不起作用的；