Swift 3 Kosher Version
I've left this here just for a case somebody has the problem.
Apple's documentation for supportedInterfaceOrientations says:
When the user changes the device orientation, the system calls this method on the root view controller or the topmost presented view controller that fills the window. If the view controller supports the new orientation, the window and view controller are rotated to the new orientation. This method is only called if the view controller's shouldAutorotate method returns true.
In few words you have to override supportedInterfaceOrientations in root view controller so that it returns the value for its top child view controller and default value otherwise.
What you should do is checking if app supports all modes (go to Deployment info in targets General settings or Info.plist), find out the class of your root view controller. It can be generic UIViewController, UINavigationController, UITabBarController or some custom class. You can check it out this way:
dump(UIApplication.shared.keyWindow?.rootViewController)
Or any other way you like.
Let it be some CustomNavigationController. So you should override supportedInterfaceOrientations like this:
class CustomNavigationController: UINavigationController {
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return topViewController?.supportedInterfaceOrientations ?? .allButUpsideDown
}
}
In any view controller which should support only portrait orientation for instance override supportedInterfaceOrientations this way:
class ChildViewController: UIViewController {
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .portrait
}
}
Then don't forget to check if shouldAutorotate of you root view controller and topmost presented view controller already returns true. If not, add this to classes definitions:
override var shouldAutorotate: Bool {
return true
}
Otherwise supportedInterfaceOrientations will nor be called at all.
Here you go!
If you need to fix the opposite problem when only one view controller should support a bunch of orientations and others don't, make this changes to every view controller but this one.
Hope this will help.
