Change orientation in UITabBar

I have a UITabBar with a lot of view controllers and navigation controller. I am trying to support both orientations but only portrait works. I know that I have to override this method in all view controllers and return YES and I did like this:

- (BOOL)shouldAutorotateToInterfaceOrien开发者_运维问答tation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

but it still doesn't work. What could possibly be wrong?

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Be sure:

• Your info.plist supports all the orientations.
• All the view controllers support it as well.
• Your UITabBarController itselfs supports them.