title: UIPageViewController resize child view to reserve space for itself
body: <p>I am developing an iPhone application for ios 7.1. The <code>ViewController</code> hierarchy is like "<code>NavigationController</code> -> <code>UIViewController</code> -> <code>UIPageViewController</code> -> <code>UITableViewControllers</code>". <code>NavigationBar</code> is hidden. Status bar is present. Everything is done programmatically. No storyboard/Xib is used.</p>
  
  <p>In the <code>UIPageViewController</code>, I am creating a custom Title view (similar to the Navigation bar, but inside its own view). Hence the child controller's view (<code>UITableView</code>) should be pushed below this Title View. I have tried adding a constraint ("V:[TitleView]-0-[ChildView]"), after setting <code>translatesAutoresizingMaskIntoConstraints</code> of child view to NO. But this resulted in a blank screen (except for the title view). Changing frame of the child view etc and all did not have any effect. </p>
  
  <p>Apart from setting the above flag and adding the constraint, I have not added/modified any auto layout/auto resize related settings. The application supports only the portrait mode (Home button down). There is not going to be any other dynamic layout change either. Appreciate if you could help in resolving this issue.</p>