Why is the topLayoutGuide length different on iPhone and iPad?
<p>On an iPad, my view controller (inside a navigation controller, as the detail view of a split view controller) has a topLayoutGuide length of 64 with the navigation bar shown and 20 with the navigation bar hidden. This makes sense.</p>

<p>On an iPhone in landscape, the status bar is automatically hidden and the navigation bar gets shorter. The topLayoutGuide length reads as 32 with the nav bar shown, and 0 with it hidden. This also makes sense.</p>

<p>However, on an iPhone in portrait, it has topLayoutGuide lengths of 44 with the nav bar shown and 0 with it hidden. The status bar is shown automatically; why doesn't the topLayoutGuide acknowledge that extra 20px of space?</p>

<p>I'd rather not write obnoxious conditional code just so the iPhone will read its topLayoutGuide correctly. Is there a property of the view or navigation controller that I can set that will return the intuitive values for topLayoutGuide? And does it have something to do with being inside a split view controller?</p>