For some input screens we need a minimum height for the user to be able to comfortably navigate and complete the form.
Can we prevent rotation for such screens?
This is covered a bit in the "Prepare your app for iPhone Duo" talk:
https://developer.apple.com/videos/play/tech-talks/111461/?time=222
The interface orientation on the outer display behaves like any other iPhone. iPhone Duo is a great opportunity to support landscape orientation, as people may want to set the phone down like a tent.
Interface orientation on the inner display behaves differently. The inner display doesn't honor your supported interface orientations. As with Idiom, avoid checking interface orientation for layout decisions. Use size classes instead.
So on the outer screen your supported orientations will be considered just like on other phones such that if you only support some orientations, your scene will not be rotated to that orientation. On the inner display, supported interface orientations will not be honored.
