No rotation methods called view controller introduced by UIModalPresentationFormSheet in iOS 8

I represent UINavigationController

from modalPresentationStyle=UIModalPresentationFormSheet

on iPad with iOS 8 . In the root view controller, I need to find the moment when the screen rotation is performed, but I am not receiving any events that I expect:

• -didRotateFromInterfaceOrientation:
  
  outdated and not called
• New -viewWillTransitionToSize:withTransitionCoordinator:
  
  and -traitCollectionDidChange:
  
  not being called because the view doesn't seem to convert to size.
• -application:didChangeStatusBarOrientation:
  
  called too early, not at the end of the rotation.

How can I find the end of the rotation?