My app has 4 tabs. All the view controllers support rotation, and indeed are rotated when I rotate the device. For one of the view controllers, I need to reposition some of the subviews upon rotation. I do this in willRotateToInterfaceOrientation of that view controller, and it works fine.
The problem comes when I switch to a different tab, then rotate the device, then go back to the original tab. It apparently has not received the rotation notification, since willRotateToInterfaceOrientation has not been called. So it seems as though only the “active” view controller gets notified that the device has rotated.
The question: how do you get all the view controllers (controlled by a TabBarController) to rotate?
Unfortunately this is a bug in iOS 3.x. It works fine in iOS 4.x. I’ve seen apps that manually keep track of orientation changes and then do the rotation manually for inactive viewcontrollers. Sucks.