title: How to "preselect" UIActivityViewController Icon?
body: <p>I would like to redirect the user to an app that could be selected in UIActivityViewController.</p>
  
  <p>For example, the "Message" app is often shown in UIActivityViewController. How could I,in advance, directly redirect the user to this app without showing the UIActivityViewController?</p>
  
  <p>I would be glad to know if someone can help me out.</p>