iOS开发之如何给View添加指定位置的边框线详解

2020-02-19 15:44:45

字体：大中小

来源：转载

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开发的项目多种多样，有时候程序员也会遇到瓶颈不知如何往下操作，今天武林技术频道小编为大家编写了iOS开发之如何给View添加指定位置的边框线详解，希望对大家有所帮助！

示例代码

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：