title: iOS Nested View Controllers view inside UIViewController's view?
body: <p>Is it typically bad programming practice in iOS to have a nested view controller's view inside UIViewController's view? Say for instance I wanted to have some kind of interactive element that responds to user's touches, but only takes up maybe 25% of the screen. </p>
  
  <p>I suppose I would add this nested view controller to my UIViewController by saying something like:</p>
  
  <pre><code>[self.view addSubview: nestedViewController.view];
  </code></pre>