xcode 6助理编辑器自动结果不会显示

I can not drag anything to the code from the storyboard. Files were in assistant editor under automatic but now there gone how do i get them back other then deleting and recreating them? Opening them up under manual it will come up but Xcode can't find the referance when dragging to the code and i get the error when naming it.I can not drag anything to the code from the st