title: UIDocumentInteractionController Opening file in a specific app without options
body: <p>I'm using UIDocumentInteractionController to open a file in another app, DropBox.</p>
  
  <p>What i'm trying to do is open the file in another specific app , but i only managed so far to display the supported apps and allowing the user to choose.</p>
  
  <pre class="lang-cpp prettyprint-override"><code>UIDocumentInteractionController *udi = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath: jpgPath]];
  [udi retain];
  CGRect r = CGRectMake(0, 0, 300, 300);
  [udi presentOpenInMenuFromRect:r inView:self.view animated:YES];
  </code></pre>
  
  <p>This presents a list of apps supported, but i want to directly open the file with dropbox, without the options box. Any ideas?</p>