title: iOS Bottom Layout Guide in the wrong position
body: <p>Stackoverflow hive-mind!</p>
  
  <p>I have come to you with a serious headache, a unsolvable obstacle! </p>
  
  <p>The issue's as follows : </p>
  
  <p>I have a UIPageViewController that has four pages and two types of content UIViewControllers - ContentViewController and UserAccessViewController. The first three pages are just three ContentViewControllers with different content inside (different image and text). The last page's the UserAccessViewController that hosts a GUI for a User to SignIn or SignUp. The "main" UIView for the UserAccessViewController's of class UIScrollView, maybe this is worth noting. </p>
  
  <p>All of the controls on the ViewControllers are constrained to the Bottom Layout Guide as a starting point. You can imagine it like a flow. The bottom-most control's constrained to the Bottom Layout Guide and the next control's constrained to the bottom-most and so on, and so forth. (See SIDE-NOTICE below for an explanation why everything's constrained with the Bottom and not the Top Layout Guide in mind).</p>
  
  <p>So, we've come to the issue at hand. Firstly, this only happens to the fourth page, UserAccessViewController. </p>
  
  <p>On iOS 8.1 everything works fine and as intended, but on iOS 7.1, the Bottom Layout Guide doesn't get positioned correctly, which, in consequence, removes all of my content off screen (remember, everything's constrained above the Bottom Layout guide).</p>
  
  <p>iOS 8.1 frame : </p>
  
  <p><code>UIView of class _UILayoutGuide's frame : [0.00, 0.00] - [0.00, 20.00]</code> -> TOP
  <code>UIView of class _UILayoutGuide's frame : [0.00, 538.00] - [0.00, 0.00]</code> -> BOTTOM (DITTO!)</p>
  
  <p>iOS 7.1 frame : </p>
  
  <p><code>UIView of class _UILayoutGuide's frame : [0.00, 0.00] - [0.00, 20.00]</code> -> TOP
  <code>UIView of class _UILayoutGuide's frame : [0.00, 0.00] - [0.00, 0.00]</code> -> BOTTOM (WTF ?!)</p>
  
  <p>Things I've tried to rectify the problem : </p>
  
  <ol>
  <li><p>Remove the constraints completely, to see if the maybe the constraints alter the Bottom Layout Guide somehow. 
  --> Results : Negative. Removing the constraints didn't change anything. Bottom Layout Guide still not positioned correctly.</p></li>
  <li><p>That's it! I've no idea what can I change :(.</p></li>
  </ol>
  
  <p>Hope the collective hive-mind will deem me worthy of assistance! </p>
  
  <hr>
  
  <p>SIDE-NOTICE : If you're wondering why the hell did I focus on the Bottom Layout Guide and not the Top one, the reason lies in the fact that, when the controls were constrained to the Top Layout Guide as reference, when the constrains were modified in viewDidLoad of a page that isn't the first, it would result in a twitch - the controls would teleport into position. I couldn't solve it differently than to use the Bottom Layout Guide instead of the Top one.</p>