IOS 开发之UILabel 或者 UIButton加下划线链接
本文主要介绍了IOS中 UILable及UIButton的带下划线链接的实现方法及附有源码下载,大家开发IOS 应用有需要的可以参考下:
方法一:
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"查看所有中奖记录"]; NSRange strRange = {0,[str length]}; [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:strRange]; [_awardDisplayBtn setAttributedTitle:str forState:UIControlStateNormal];
方法二:
HyperlinksButton.h
#import <UIKit/UIKit.h> @interface HyperlinksButton : UIButton { UIColor *lineColor; } -(void)setColor:(UIColor*)color; @end HyperlinksButton.m [objc] view plain copy print? #import "HyperlinksButton.h" @implementation HyperlinksButton - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { } return self; } -(void)setColor:(UIColor *)color{ lineColor = [color copy]; [self setNeedsDisplay]; } - (void) drawRect:(CGRect)rect { CGRect textRect = self.titleLabel.frame; CGContextRef contextRef = UIGraphicsGetCurrentContext(); CGFloat descender = self.titleLabel.font.descender; if([lineColor isKindOfClass:[UIColor class]]){ CGContextSetStrokeColorWithColor(contextRef, lineColor.CGColor); } CGContextMoveToPoint(contextRef, textRect.origin.x, textRect.origin.y + textRect.size.height + descender+1); CGContextAddLineToPoint(contextRef, textRect.origin.x + textRect.size.width, textRect.origin.y + textRect.size.height + descender+1); CGContextClosePath(contextRef); CGContextDrawPath(contextRef, kCGPathStroke); } @end
直接将这个类 copy 到工程中,,然后将需要加下划线的 Button 类名改为 HyperlinksButton就可以了,提供了 setColor: 这个接口,可以设置下划线颜色,代码很简单,不解释了。UILabel 同理可得。
示例结果:
源码下载地址:https://github.com/chaoyuan899/HyperlinksButton#how-to-use
本站源码下载:http://xiazai.zyiz.net/201707/yuanma/HyperlinksButton-master(zyiz.net).rar
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