title: iOS - programmatic modal segue with animation (such as flip)
body: <p>I know I can do a modal segue in code like this:</p>
  
  <pre><code>[presentModalViewController:my_view, animated:YES];
  </code></pre>
  
  <p>but how do I specify a fade in or horizontal/vertical flip programmatically?</p>
  
  <p>Thanks,
  Pachun</p>