title: How to add Social Framework in Xcode project?
body: <p>Just starting to learn Xcode and for this lesson I'm supposed to add the Social Framework in Xcode as to add Twitter composer features.</p>
  
  <p>So I'm following the steps in the book:</p>
  
  <ol>
  <li>I select my project and my target and go to Build Phrases.</li>
  <li>I open Link Binary with Libraries and click the + sign</li>
  <li>I look for Social Frameworks and click on Add</li>
  <li>I now can see Social Frameworks beneath my project</li>
  <li>Then I'm supposed to go to my .m file and add this code:</li>
  </ol>
  
  <p>Code:</p>
  
  <pre><code>SLComposeViewController *composer = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
  [composer setInitialText:self.tweetTextView.text];
  [self presentViewController:composer animated:YES completion:nil];
  </code></pre>
  
  <p>It then shows 3 error signs saying : <code>'Use of undeclared Identifier: SLComposeViewController'</code>. And the project won't build.</p>
  
  <p>Have I done something wrong?</p>