IOS 開發(fā)之UILabel 或者 UIButton加下劃線鏈接
本文主要介紹了IOS中 UILable及UIButton的帶下劃線鏈接的實(shí)現(xiàn)方法及附有源碼下載,大家開發(fā)IOS 應(yīng)用有需要的可以參考下:
方法一:
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NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@ "查看所有中獎(jiǎng)記錄" ]; NSRange strRange = {0,[str length]}; [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:strRange]; [_awardDisplayBtn setAttributedTitle:str forState:UIControlStateNormal]; |
方法二:
HyperlinksButton.h
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#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 |
直接將這個(gè)類 copy 到工程中,,然后將需要加下劃線的 Button 類名改為 HyperlinksButton就可以了,提供了 setColor: 這個(gè)接口,可以設(shè)置下劃線顏色,代碼很簡單,不解釋了。UILabel 同理可得。
示例結(jié)果:
源碼下載地址:https://github.com/chaoyuan899/HyperlinksButton#how-to-use
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