title: iOS Container View doesn't honour intrinsicContentSize
body: <p>I want to use a Container View to contain a camera preview. I want the camera to centered in the middle and maintain it's proper aspect ratio. (it's pink to make it obvious where its frame is)</p>
  
  <p><img src="https://i.stack.imgur.com/v6Yfo.png" alt="Story board showing container view"></p>
  
  <p>I'm stuck on the first step of trying to get the camera preview to appear at a size that's smaller than the container.</p>
  
  <p>I have a UIView subclass for the Camera Controller's view, and have the code:</p>
  
  <pre><code>- (CGSize)intrinsicContentSize
  {
    return CGSizeMake(320, 240);
  }
  </code></pre>
  
  <p>Unfortunately this isn't honoured:</p>
  
  <p><img src="https://i.stack.imgur.com/GJYIS.png" alt="iPad simulator result"></p>
  
  <p>From reading the docs, <code>intrinsicContentSize</code> looks like it's what I want. Eventually I want to use Auto Layout as well, but I'm trying to solve one thing at a time.</p>
  
  <p>How do I make this work?</p>