title: SetHidden not working
body: <p>I am trying to show a label for some seconds when i press a button. But the hide function is not working properly. </p>
  
  <pre><code>-(void) hide_label:(NSString *)value{
      [value setHidden:YES];
  
  }
  </code></pre>
  
  <p>Get the error: No Visible @interface for 'NSString' declares the selector 'setHidden:'. </p>