tabBarController and navigationControllers in landscape mode, episode II

Question

I have a UITabBarController, and each tab handles a different UIViewController that pushes on the stack new controllers as needed. In two of these tabs I need, when a specif

Answer 1

Is it really OK to subclass UITabBarController (as suggested in the accepted answer above)?

I've understood that Apples says something like "you should never ever subclass UITabBarController or UINavigationController" - or have I misunderstood?

Anyway; I found this tutorial where they subclasses a UIViewController in which they put a UITabBarController.