How do I animate the resizing of UIPopoverController containing a UINavigationController based on the sizes of the view controllers being pushed?
Normally, setting preferredContentSize on a view controller you want to
present with a UIPopoverController is enough to trigger the popover's
animated resize.
However when presenting a UINavigationController in a popover, setting
preferredContentSize causes the resize animation to be performed after the
push transition (see
kylesluder/PopoverSizing).
The solution is to use view controller
containment wrap
the UINavigationController in a containing UIViewController (i.e. make
UINavigationController), which we then manipulate the preferredContentSize
of. We can make sure this is done every time a view controller is pushed by
supplying a delegate to the navigation controller.
See MESViewController.m for more details.