title: Inflating child view controllers into fixed positions within parent
body: <p>I want users to be able to click on different headings to show different segments of the screen. </p>
  
  <p>The layout is like this:</p>
  
  <p><a href="https://i.stack.imgur.com/vEmHr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vEmHr.png" alt="enter image description here"></a>
  By clicking on either <code>Heading_One</code> or <code>Heading_Two</code> will trigger a set of buttons to appear. In the app the user is presented with a set of half a dozen titles, each opening to dense functions/options for the user to use. </p>
  
  <p>At the moment I'm inflating child view controllers through <code>addChildViewController</code> but I have to hardcode each <code>child view controller</code>'s position.</p>
  
  <p>Is there a way to do this so it's like Android's fragment system? Thanks</p>