I've made my storyboard support only w:Regular h:Compact.
Cause i needed to support all devices in landscape.
But I've figure that it's not supporting iPad that way.
When i run iPad it just a blank page.
I tried to convert it to any:any but it hide all the sub views. Is there anyway to convert this class size to any:any to support all without risking redo all this work? Or at least I need a way to make it only for iPad?
First of all, wRegular hCompact is for iPhone 6 Plus in landscape, not iPads in landscape:
Be sure to check the description at the bottom of the size class choice.
If you want to convert existing elements to show in wAny hAny, try choosing each element, then going to the attributes inspector and clicking the + button at the bottom, then add it for any width and any height. Make sure the checkmark is there beside installed for any width and any height also.
来源：https://stackoverflow.com/questions/26662077/ios8-class-size-wregular-hcompact-to-wany-hany