发个完整的超链接的UILabel教程 (转)
转自:http://www.cocoachina.com/bbs/read.php?tid=60903&page=1
为了实例化咱们的Label时必须做点啥.. 先来个协议.
.h文件
#import <Foundation/Foundation.h> @class MyLabel; @protocol MyLabelDelegate <NSObject> @required - (void)myLabel:(MyLabel *)myLabel touchesWtihTag:(NSInteger)tag; @end
新建类,继承UILabel.
@interface MyLabel : UILabel { id <MyLabelDelegate> delegate; } @property (nonatomic, assign) id <MyLabelDelegate> delegate; - (id)initWithFrame:(CGRect)frame; @end
.m文件
#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为不限制 - (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
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]]; }