title: Am I getting crazy?
body: <p>I have been searching for 10 minutes why the first line gets a warning whereas the 3 last ones do not:</p>
  
  <pre><code>[self performSelector:@selector(displayWebServices) withObject:NULL atferDelay:0.5];
  
  [self performSelector:@selector(displayWebServices) withObject:NULL afterDelay:0.5];
  
  [self performSelector:@selector(displayWebServices) withObject:NULL afterDelay:0.5];
  
  [self performSelector:@selector(displayWebServices) withObject:NULL afterDelay:0.5];
  </code></pre>
  
  <p>The warning is that RootViewController (self instance) may not respond to performSelectot:withObject:afterDelay.</p>
  
  <p>I wonder whether there is a hidden character in the line...</p>
  
  <p>Did you already face this same issue with XCode ?</p>
  
  <p>Regards,
  Apple92</p>