Custom UINavigationBar Height

SceneDelegate.swift

// MARK: - SceneDelegate
class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        let navigationController = UINavigationController(navigationBarClass: NavigationBar.self, toolbarClass: nil)
        (navigationController.navigationBar as! NavigationBar).preferredHeight = 88
        navigationController.setViewControllers([ViewController()], animated: false)
        
        guard let windowScene = (scene as? UIWindowScene) else { return }
        let window = UIWindow(windowScene: windowScene)
        window.rootViewController = navigationController
        window.makeKeyAndVisible()
        self.window = window
    }
}

// MARK: - NavigationBar
class NavigationBar: UINavigationBar {
    
    var preferredHeight: CGFloat = 44

    override var frame: CGRect {
        get {
            return super.frame
        } set {
            var frame = newValue
            frame.size.height = preferredHeight
            super.frame = frame
        }
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        frame = CGRect(x: frame.minX, y: frame.minY, width: frame.width, height: preferredHeight)
    }
}

// MARK: - ViewController
class ViewController: UITableViewController {
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        transitionCoordinator?.animate { _ in
            (self.navigationController?.navigationBar as? NavigationBar)?.preferredHeight = 88
        }
    }
}

// MARK: - DetailViewController
class DetailViewController: UITableViewController {
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        transitionCoordinator?.animate { _ in
            (self.navigationController?.navigationBar as? NavigationBar)?.preferredHeight = 44
        
        }
    }
}