title: Filter apps that UIDocumentInteractionController suggests to Open In
body: <p>Is it possible to manage the list of apps that UIDocumentInteractionController is going to present for opening my file in? Actually, I need to create black and white lists of apps.
   I took a look at UIDocumentInteractionControllerDelegate but it doesn't contain the needed methods..only<br>
  <code>- (void) documentInteractionController: (UIDocumentInteractionController *) controller willBeginSendingToApplication: (NSString *) application</code></p>
  
  <p>and I need something like</p>
  
  <p><code>-(BOOL)shouldPresentForOpenInApplication: (NSString *)</code></p>