/// Constrains child ViewController's to be in portrait mode when loaded within this specific Navigation Controller stack.
final class PortaitNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Hide Border
        navigationBar.setBackgroundImage(UIImage(), for: .default)
        navigationBar.shadowImage = UIImage()
    }

}

// MARK: - ViewController Override

extension PortaitNavigationController {
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .portrait
    }

    override var shouldAutorotate: Bool {
        return false
    }
}