NavigationController PushedView Controller解散整个NavigationController-快速-以编程方式

问题描述

我正在以这种方式呈现一个NavigationController：

let profileViewController = ProfileViewController(nibName: nil,bundle: nil)
        let navigationControllerProfile = UINavigationController(rootViewController: profileViewController)
        navigationControllerProfile.setNavigationBarHidden(true,animated: false)
        navigationControllerProfile.modalPresentationStyle = .fullScreen
        self.present(navigationControllerProfile,animated: true,completion: nil)

每当我从该NavigationController中推送Viewcontroller时：

let showCaseViewController = ShowcaseViewController()
        showCaseViewController.modalPresentationStyle = .overFullScreen
        self.navigationController?.pushViewController(showCaseViewController,animated: true)

已正确推动ViewController，但1秒钟后，整个NavigationController均被关闭。

解决方法

代码向视图控制器显示导航

                let vc = storyboard?.instantiateViewController(withIdentifier: "firstvc") as! firstvc
                let navigation = UINavigationController(rootViewController: vc)
                vc.modalPresentationStyle = .fullScreen
                self.present(navigation,animated: true,completion: nil)

用于在显示的视图控制器内部执行推送操作的代码

            let vc = storyboard?.instantiateViewController(withIdentifier: "email") as! email
            self.navigationController?.pushViewController(vc!,animated: true)