├── pic.gif
├── README.md
├── HyperlinksButton.h
└── HyperlinksButton.m


/pic.gif:
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https://raw.githubusercontent.com/chaoyuan899/HyperlinksButton/HEAD/pic.gif


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/README.md:
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 1 | HyperlinksButton
 2 | ================
 3 | ### 给UIButton 的Title 画下划线。    
 4 | draw a underline for UIButton title
 5 | 
 6 | ### How To Use   
 7 |   将需要加下划线的Button类名修改为HyperlinksButton即可。   
 8 |   setColor: 可以设置下划线颜色。   
 9 | ### 示例图片
10 |   ![alt text][id]
11 |   [id]:./pic.gif "Title"
12 | 


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/HyperlinksButton.h:
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 1 | //
 2 | //  HyperlinksButton.h
 3 | //  memberapp
 4 | //
 5 | //  Created by sam on 4/30/14.
 6 | //  Copyright (c) 2014 com.by-health. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface HyperlinksButton : UIButton
12 | {
13 |     UIColor *lineColor;
14 | }
15 | -(void)setColor:(UIColor*)color;
16 | @end
17 | 


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/HyperlinksButton.m:
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 1 | //
 2 | //  HyperlinksButton.m
 3 | //  memberapp
 4 | //
 5 | //  Created by sam on 4/30/14.
 6 | //  Copyright (c) 2014 com.by-health. All rights reserved.
 7 | //
 8 | 
 9 | #import "HyperlinksButton.h"
10 | 
11 | @implementation HyperlinksButton
12 | 
13 | - (id)initWithFrame:(CGRect)frame
14 | {
15 |     self = [super initWithFrame:frame];
16 |     if (self) {
17 |         
18 |     }
19 |     return self;
20 | }
21 | 
22 | -(void)setColor:(UIColor *)color{
23 |     lineColor = [color copy];
24 |     [self setNeedsDisplay];
25 | }
26 | 
27 | 
28 | - (void) drawRect:(CGRect)rect {
29 |     CGRect textRect = self.titleLabel.frame;
30 |     CGContextRef contextRef = UIGraphicsGetCurrentContext();
31 |     
32 |     CGFloat descender = self.titleLabel.font.descender;
33 |     if([lineColor isKindOfClass:[UIColor class]]){
34 |         CGContextSetStrokeColorWithColor(contextRef, lineColor.CGColor);
35 |     }
36 |     
37 |     CGContextMoveToPoint(contextRef, textRect.origin.x, textRect.origin.y + textRect.size.height + descender+1);
38 |     CGContextAddLineToPoint(contextRef, textRect.origin.x + textRect.size.width, textRect.origin.y + textRect.size.height + descender+1);
39 |     
40 |     CGContextClosePath(contextRef);
41 |     CGContextDrawPath(contextRef, kCGPathStroke);
42 | }
43 | @end
44 | 


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