title: Container View Controller Examples
body: <p>Can anyone point me to any good examples of creating a Custom View Controller as a Container View Controller? The only documentation I can find is a couple of paragraphs in the <a href="https://developer.apple.com/documentation/uikit/uiviewcontroller" rel="nofollow noreferrer">UIViewController Class Reference</a>. I feel I need a little more information than that and an example implementation would be nice. Google has turned up nothing at all.</p>
  
  <p>I am specifically interested in the method: </p>
  
  <pre><code>transitionFromViewController:toViewController:duration:options:animations:completion:
  </code></pre>