title: How can I force a webview login on SDK 3.1.1 using openActiveSessionWithReadPermissions in iOS 6?
body: <p>I got this code from the facebook tutorial:</p>
  
  <pre><code>- (BOOL)openSessionWithAllowLoginUI:(BOOL)allowLoginUI {
  NSArray *permissions = [[NSArray alloc] initWithObjects:
      @"email", 
      @"user_likes",
      nil];
  return [FBSession openActiveSessionWithReadPermissions:permissions
                                            allowLoginUI:allowLoginUI
                                       completionHandler:^(FBSession *session,
                                                       FBSessionState state,
                                                       NSError *error) {
                                       [self sessionStateChanged:session
                                                           state:state
                                                           error:error];
                                   }];
  </code></pre>
  
  <p>}</p>
  
  <p>But it always opens a Safari Tab.
  <strong>I need to force a webview login instead of Safari Tab.</strong></p>
  
  <p>Thanks in advanece!</p>