title: UIActivityViewController doesn't show FB and Twitter on iOS 7
body: <p>I am trying to share some items using UIActivityViewController. On iOS 6 it works fine. But when I test it on iOS 7 only mail icon shows up. In doubt that my SDK was too old I downloaded the most recent one, but it's still behaves the same. I tested on both simulator and a device with facebook installed on it, no luck. </p>
  
  <p>Now I am running out of ideas what I do wrong.</p>
  
  <p>Here is my code</p>
  
  <pre><code>- (void)shareButtonWasTapped:(BMPopUpMenuView *)popUpMenu {
  
  NSString *shareText;
  
  if (_correctPatternFound) {
      shareText = @"Yey, I solved a puzzle!";
  }
  else {
      shareText = @"I am solving a photzle...";
  }
  
  NSURL *shareURL = [NSURL URLWithString:@"http://somewebsite.com"];
  
  NSArray *items   = [NSArray arrayWithObjects:
                      shareText,
                      _shareImage,
                      shareURL, nil];
  
  
  UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
  [activityViewController setValue:shareText forKey:@"subject"];
  
  activityViewController.excludedActivityTypes =   @[UIActivityTypeCopyToPasteboard,
                                                     UIActivityTypePostToWeibo,
                                                     UIActivityTypeSaveToCameraRoll,
                                                     UIActivityTypeCopyToPasteboard,
                                                     UIActivityTypeMessage,
                                                     UIActivityTypeAssignToContact,
                                                     UIActivityTypePrint];
  
  [self presentViewController:activityViewController animated:YES completion:nil];
  }
  </code></pre>