栏项目不显示我何时以编程方式使用segue

发布于 2025-01-25 17:50:43 字数 874 浏览 4 评论 0原文

我正在构建一个具有只有现有用户才能登录到的主VC的应用程序。主页是初始VC，因此我将导航栏嵌入到它。当我第一次打开应用程序时，我可以看到栏项目，但是当我登录并再次登录时，我看不到bar项目，有人知道为什么吗？我应该添加一些代码吗？还是更改一些定义？

我以这样的方式编程使用SEGUE：

  private var handle: AuthStateDidChangeListenerHandle?


   handle = Auth.auth().addStateDidChangeListener({ (auth, user) in
            if user == nil{
                
                if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Home") as? MainVC
                {
                    self.present(vc, animated: true, completion: nil)
                }
                
            }else{
                //keep going with the code...
          })

在模拟器中，它从主VC开始，然后签名（PIC 1），然后登录（PIC 2）并返回主VC，但现在看不到条件（图3）。

链接到应用程序图片

原文

I’m building an app which has a main vc that only existing user can log in to. The main page is the initial vc so I embed in the navigation bar to it. When I open the app in the first time I can see the bar items, but when I sign out, and log in again I can’t see the bar items, someone know why? Should I add some code? or maybe change some definitions?

I’m using segue programmatically like this:

  private var handle: AuthStateDidChangeListenerHandle?


   handle = Auth.auth().addStateDidChangeListener({ (auth, user) in
            if user == nil{
                
                if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Home") as? MainVC
                {
                    self.present(vc, animated: true, completion: nil)
                }
                
            }else{
                //keep going with the code...
          })

In the simulator it starts with the main vc then I sign out (pic 1), then I log in (pic 2) and get back to the main vc but now I can’t see the bar items (pic 3).

link to the app pictures

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灵芸 2025-02-01 17:50:44

您必须在NavigationController私有VAR句柄中介绍您的主要风险

投资：AuthstatedIdIdChangelisTenerHandle？

hander = auth.auth（）。
如果用户== nil {

            if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Home") as? MainVC
                  {
                      let navVc = UINavigationController(rootViewController: vc)
                      
                      self.present(navVc, animated: true, completion: nil)
                  }
            
        }else{
            //keep going with the code...
      })

you must present your main vc in navigationcontroller

private var handle: AuthStateDidChangeListenerHandle?

handle = Auth.auth().addStateDidChangeListener({ (auth, user) in
if user == nil{

            if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Home") as? MainVC
                  {
                      let navVc = UINavigationController(rootViewController: vc)
                      
                      self.present(navVc, animated: true, completion: nil)
                  }
            
        }else{
            //keep going with the code...
      })

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