title: how to create user interactive tweet or Facebook post with UIActivityViewController
body: <p>I am trying to figure out how to create a user interactive post or tweet kind of like SoundCloud's here below:</p>
  
  <p><a href="https://i.stack.imgur.com/x5ctK.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/x5ctK.jpg" alt="(Shared directly from Sound Cloud)"></a></p>
  
  <p>The portion highlighted in yellow is the part that interests me because as far as I can tell when it comes to UIActivityViewController (which is what Sound Cloud uses for this) the only objects that work for sharing are images and strings.</p>
  
  <p>Further more, if you were to tap the portion highlighted in yellow this screen would pop up on twitter:</p>
  
  <p><a href="https://i.stack.imgur.com/YNfxl.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YNfxl.jpg" alt="enter image description here"></a> </p>
  
  <p>HOW DO THEY DO THAT!? THEY HAVE A PAUSE BUTTON AND EVERYTHING!</p>
  
  <p>This is my attempt to do that...</p>
  
  <pre><code>func displayShareSheet(shareContent:String) {
  
          let someView:CustomView = CustomView() // CustomView is a subclass of UIView
  
          let activityViewController = UIActivityViewController(activityItems: [someView], applicationActivities: nil)
          presentViewController(activityViewController, animated: true, completion: {})
      }
  </code></pre>
  
  <p>...which doesn't work. The UIActivityViewController sheet pops up with no share options indicated.</p>
  
  <p>I understand that some may consider this a broad question but if you could at least point me in the right direction I would be very grateful. Thank You.</p>