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本文主要给大家介绍了关于iOS如何给View添加指定位置边框线的相关内容,分享出来供大家参考学习,下面话不多说了,来一起看看详细的介绍吧。
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;
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
#importtypedef 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;
总结
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