title: How to resize views after dynamic type's UIContentSizeCategoryDidChangeNotification
body: <p>I want to embrace dynamic type in my app, and I want it to be responsive to text size changes while it's running, without restarting the app (when I restart, it applies the new size successfully).</p>
  
  <p>I've implemented <code>UIContentSizeCategoryDidChangeNotification</code> in my app delegate, and fired a notification on <code>applicationDidBecomeActive:</code>, notifying my view controllers. In my view controller's handler method, I've tried:</p>
  
  <ul>
  <li><code>[self.view setNeedsDisplay];</code></li>
  <li><code>[self.view setNeedsLayout];</code></li>
  <li><code>[self.view invalidateIntrinsicContentSize];</code></li>
  </ul>
  
  <p>But none seem to work. It does nothing. It is called (hits the breakpoint) when app becomes active, and it does get called for the frontmost view, but nothing changes.</p>
  
  <p>How can I make my app respond to type changes dynamically when running?</p>