All of my view controllers suddenly had this bug. Nothing shows up in interface builder, but it works fine when I run it. This makes it so I can't edit my views in interface builder. Whats going on here? Xcode 6.1 GM ios 8.1 B1. Swift.
I assume you made your design in a size class other than wAny / hAny. Switch back to the size class you used for design and your controls will reappear.