What would be causing the following warning (and subsequent alignment issues on iOS 7)?
Attribute Unavailable: Layout attributes relative to the layou
None of the posted answers solved the problem for me. But the reason for this is the following: Xcode 6 creates constraints based on relative margins by default. Those are only available on iOS 8.0 and newer. You get these warnings when your deployment target is set to iOS 7.0 or lower.
The way I fixed the warning: