UILabel 怎么超链接

发布网友发布时间：2022-05-19 10:59

共1个回答

热心网友时间：2023-10-11 01:07

本文摘自：http://www.cocoachina.com/bbs/read.php?tid-60903-keyword-uilabel.html

发个完整的超链接的UILabel教程, 高手绕道~

为了实例化咱们的Label时必须做点啥.. 先来个协议.
.h文件
复制代码
#import <Foundation/Foundation.h>
@class MyLabel;
@protocol MyLabelDelegate <NSObject>
@required
- (void)myLabel:(MyLabel *)myLabel touchesWtihTag:(NSInteger)tag;
@end

新建类,继承UILabel.
复制代码
@interface MyLabel : UILabel {
id <MyLabelDelegate> delegate;
}
@property (nonatomic, assign) id <MyLabelDelegate> delegate;
- (id)initWithFrame:(CGRect)frame;
@end

.m文件
复制代码
#import "MyLabel.h"
#define FONTSIZE 13
#define COLOR(R,G,B,A) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:A]
@implementation MyLabel
@synthesize delegate;
// 设置换行模式,字体大小,背景色,文字颜色,开启与用户交互功能,设置label行数,0为不*
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame])
{
[self setLineBreakMode:UILineBreakModeWordWrap|UILineBreakModeTailTruncation];
[self setFont:[UIFont systemFontOfSize:FONTSIZE]];
[self setBackgroundColor:[UIColor clearColor]];
[self setTextColor:COLOR(59,136,195,1.0)];
[self setUserInteractionEnabled:YES];
[self setNumberOfLines:0];
}
return self;
}
// 点击该label的时候, 来个高亮显示
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[self setTextColor:[UIColor whiteColor]];
}
// 还原label颜色,获取手指离开屏幕时的坐标点, 在label范围内的话就可以触发自定义的操作
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[self setTextColor:COLOR(59,136,195,1.0)];
UITouch *touch = [touches anyObject];
CGPoint points = [touch locationInView:self];
if (points.x >= self.frame.origin.x && points.y >= self.frame.origin.x && points.x <= self.frame.size.width && points.y <= self.frame.size.height)
{
[delegate myLabel:self touchesWtihTag:self.tag];
}
}
- (void)dealloc {
[super dealloc];
}
@end

实例化:
复制代码
MyLabel *webSite = [[MyLabel alloc] initWithFrame:CGRectMake(10, 10, 100, 20)];
[webSite setText:@"http://www.google.com"];
[webSite setDelegate:self];
[self.view addSubview:webSite];
[webSite release];
#pragma mark MyLabel Delegate Methods
// myLabel是你的MyLabel委托的实例, tag是该实例的tag值, 有点多余, 哈哈
- (void)myLabel:(MyLabel *)myLabel touchesWtihTag:(NSInteger)tag {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:webSite.text]];
}