升级到iOS 6和RootViewController方向不正确

I am upgrading a legacy app to iOS 6, which only supports landscape orientation. When I run the app in the iPhone simulator or on my iPhone 4, the orientation of the root view controller is in portrait mode when it is supposed to be in landscape right. The keyboard is in the correct position initially, however. In addition, when I rotate the device, the keyboard sticks to its initial orientation, and the root view never changes orientation.I am upgrading a legacy app to iOS 6, which onl