BUG: Has bug that swipe to a already initialized view which was different orientation last time, it get wrong bounds.
BUG: swiping back after rotate
Documented Stable Version.

There are two bugs:
1. “Hide tool bar -> rotate -> show tool bar” will lead to wrong position of description view. This is because toolbar.height does not change immediately while hidden.
2. “open a photo -> swipe to another -> rotate -> swipe back” lead to wrong zoom scale range. This is because the destination view’s frame was not updated at the moment willTransitionToViewControllers is called, and the moment updateZoomScale is called.