title: SLComposeViewController CompletionHandler
body: <p>Hi how do I get notified if a tweet was completed using the SLComposeViewController CompletionHandler. Here is the code to send a tweet </p>
  
  <pre><code>  if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
      {
          SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
          [tweetSheet setInitialText:@"Tweeting from my own app! :)"];
          [tweetSheet addURL:[NSURL URLWithString:@"www.someurl.com"]];
  
          [self presentViewController:tweetSheet animated:YES completion:NULL];
      }
  </code></pre>