title: How to get TopVerticalLayout constraint right in iOS7?
body: <p>I'm having the following Storyboard view-controller setup:<br>Navigation-TableView-TabBar-{TabItem1View,TabItem2View}
  <img src="https://i.stack.imgur.com/jf9pf.png" alt="enter image description here"></p>
  
  <p>If I run in an iOS8.1 simulator the TabItem1View shows correct behaviour regarding the top layer-out buttons like:<br>
  <img src="https://i.stack.imgur.com/KGf8S.png" alt="enter image description here"></p>
  
  <p>When I rotate and switch to TabItem2View and back to TabItem1View everything still seems OK, just as designed in Storyboard with AutoLayout.
  <br><img src="https://i.stack.imgur.com/Ijn7u.png" alt="enter image description here">
  <img src="https://i.stack.imgur.com/OrLlN.png" alt="enter image description here"></p>
  
  <p>However when I run in an iOS7 simulator the TabItem1View top-buttons don't align up to the TopLayoutGuide and only when I select TabItem2 (which show up correctly) and back to TabItem1 they seem to be correct (as designed in Storyboard). This behaviour also occurs when I rotate either TabItem1View or TabItem2View and switch between the two of them.</p>
  
  <p><br>
  <img src="https://i.stack.imgur.com/pzKy8.png" alt="enter image description here">
  <img src="https://i.stack.imgur.com/wQDYx.png" alt="enter image description here">
  <img src="https://i.stack.imgur.com/zto7P.png" alt="enter image description here"></p>
  
  <p>I read that disabling the ExtendEdges Under Top/Bottom bar seems one of the tricks you can apply, but I haven't found any other tricks which prevents the TabItem1View top buttons dancing up and down when switching TabItems or device rotation.</p>
  
  <p>This problem is causing a lot of frustration regarding Autolayout and I don't see any means yet to solve this. Is it one of the many bugs regarding Autolayout iOS7/iOS8/Xcode? I'm using Xcode 6.1.1 and started this project with a fresh new Autolayout and only disabling the "Use size classes" feature. Since I'm almost pulling out all my remaining hear out of frustration, I don't want to end up bold at this age, so if anybody knows a fix, I'll be very happy to try it. Thanks very much in advance!</p>