// // RootVC.swift // Example // // Created by xaoxuu on 2019/8/12. // Copyright © 2019 Titan Studio. All rights reserved. // import UIKit class RootVC: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. let vc = ViewController() let nav = UINavigationController(rootViewController: vc) addChild(nav) view.addSubview(nav.view) nav.view.frame = view.bounds if #available(iOS 11.0, *) { nav.navigationBar.prefersLargeTitles = true } else { // Fallback on earlier versions } } /* // MARK: - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation override func prepare(for segue: UIStoryboardSegue, sender: Any?) { // Get the new view controller using segue.destination. // Pass the selected object to the new view controller. } */ }