title: Facebook integration work, but not on my iPhone
body: <p>I have a little question about my Facebook integration in my App.
  In my Simulator, it's all perfect, but if I am testing the app at my normal 
  IPhone (5) the Facebook post window don't open. I get no error or warnings but nothing happens.</p>
  
  <p>Maybe you have any ideas, thank you!</p>
  
  <p>Have a nice day!</p>
  
  <p>//edit: my code</p>
  
  <pre><code>- (IBAction)postToFacebook:(id)sender {
  if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) {
      SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
  
      [controller setInitialText:@"First post from my iPhone app"];
      [self presentViewController:controller animated:YES completion:Nil];
  }
  </code></pre>
  
  <p>}</p>