title: Facebook, Twitter icon not showing in UIActivityViewController on iOS7
body: <p>I have added this code for presenting a <code>UIActivityViewController</code>:</p>
  
  <pre><code>-(IBAction)activityAction:(id)sender
  {
      UIActivityViewController *activityViewController = [[UIActivityViewController alloc]initWithActivityItems:[NSArray arrayWithObjects:@"Hello Welcome!",[UIImage imageNamed:@"scene3.jpg"],nil] applicationActivities:nil];
  
       activityViewController.excludedActivityTypes = @[UIActivityTypePostToFacebook, UIActivityTypePostToTwitter, UIActivityTypePostToWeibo, UIActivityTypeAssignToContact];
      [self presentViewController:activityViewController animated:YES completion:nil];
  }
  </code></pre>
  
  <p>Facebook, Twitter and Weibo icons are not showing in iOS7. In iOS6, all the icons are showing correctly. See the screenshot below:</p>
  
  <p><img src="https://i.stack.imgur.com/ovs9Z.png" alt="enter image description here"></p>
  
  <p>How can I solve this?</p>