从UIButton获取UILabel的文本

Question

I am new to iPhone ,

There are lots of button in my app and on each button i have one UILabel , when user clicks on any button i want to fetch corresponding text of that label from that button.

Here is my code snippet,

- (void) buttonClicked:(UIButton*)sender
{ 
    NSString *Txt=  sender.titleLabel.text;
    NSLog(@"Txt=%@",Txt);
}

but my log shows: Txt=null

Any help will be appreciated.

Answer 1

I assume u might have subviewed label on button like this:

 UILabel *lblText = [[UILabel alloc]initWithFrame:button.frame];
 lblText.text = @"NameofButton";
 [button addSubview:lblText];
 [lblText release];

Now button click event will be like this:

- (void) buttonClicked:(UIButton*)sender
{ 
  //NSArray *arrSubViews = [sender subviews];
  for (id anObject in [sender subviews]) {
      if([anObject isKindOfClass: [UILabel class]]){
          UIlabel *myLabel = anObject;
          NSString *Txt=  myLabel.text;
          NSLog(@"Txt=%@",Txt);
    }
  }

}

Answer 2

确保您使用以下方式设置标题：

[button setTitle:@"your title" forState:UIControlStateNormal];