如何确定UILabel是否被触动？ [英] How can I determine if a UILabel was touched?

问题描述

我正在尝试确定UILabel是否被触动，如果是这样做的话。给... ..

 。 
。 
。 
 UILabel * site = [[UILabel alloc] initWithFrame：CGRectMake（0，185，320，30）]; 
 site.text = [retriever.plistDict valueForKey：@url]; 
 site.textAlignment = UITextAlignmentCenter; 
 site.backgroundColor = [UIColor clearColor]; 
 site.textColor = [UIColor whiteColor]; 
 site.userInteractionEnabled = YES; 
 [theBgView addSubview：site]; 
 [网站发布]; 
。 
。 
。 
  

然后我写回调。

<$ p $ {code> - （void）touchesEnded：（NSSet *）touches withEvent：（UIEvent *）event {
retriever = [PListRetriever sharedInstance];
CGPoint pt = [[touches anyObject] locationInView：self];
NSURL * target = [[NSURL alloc] initWithString：[retriever.plistDict valueForKey：@url]];
[[UIApplication sharedApplication] openURL：target];
}

问题是现在，无论我在哪里查看网址正在开放如何确定是否只有我的标签被触摸？

解决方案

如果您将标签添加到课程中，您可以触摸事件中您的视图中的点击测试：

   - （void）touchesEnded：（NSSet *）触及Event :( UIEvent *）event 
 {
 UITouch * touch = [[event allTouches] anyObject]; 
 if（CGRectContainsPoint（[self.site frame]，[touch locationInView：self.view]））
 {
 NSURL * target = [[NSURL alloc] ...]; 
 ... 
} 
} 
  

另外，不要忘记释放您分配的URL（否则您正在泄漏）。

I am trying to determine if a UILabel was touched and if so do something. Give ..

.
.
.
UILabel * site = [[UILabel alloc] initWithFrame:CGRectMake(0, 185, 320, 30)];
site.text = [retriever.plistDict valueForKey:@"url"];
site.textAlignment =UITextAlignmentCenter;
site.backgroundColor = [UIColor clearColor];
site.textColor = [UIColor whiteColor];
site.userInteractionEnabled = YES;
[theBgView addSubview:site];
[site release];
.
.
.    

Then I write the callback.

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    retriever = [PListRetriever sharedInstance];
    CGPoint pt = [[touches anyObject] locationInView: self];
        NSURL *target = [[NSURL alloc] initWithString:[retriever.plistDict valueForKey:@"url"]];
        [[UIApplication sharedApplication] openURL:target];
  }

The problem is right now, no matter where I touch in the View the Url is being opened. How do I determine if only just my label was touched?

解决方案

If you add the label to the class, you can do a hit-test on your view in the touch event with:

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
  UITouch *touch = [[event allTouches] anyObject];
  if (CGRectContainsPoint([self.site frame], [touch locationInView:self.view]))
  {
    NSURL *target = [[NSURL alloc] ...];
    ...
  }
}

Also, don't forget to release the URL you allocate (otherwise you are leaking).

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