swift - '在 NSBundle 包中找不到名为 'MainTabController' 的 Storyboard

Question

我收到的似乎无法修复的错误是

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Could not find a storyboard named 'MainTabController' in bundle NSBundle

应用程序将构建并显示登录屏幕，但会立即崩溃并出现上述错误。

我已经尝试了其他与此类似的帖子中的所有以下内容，但没有成功。

1. 删除 info.plist 文件中对 Storyboard的引用。当我执行此操作时，应用程序确实会启动，但我会看到黑屏，因为它没有加载 Storyboard 。
2. 摆弄 Target Membership Main.storyboard。
3. 从项目中删除 Storyboard，清理、运行，然后重新添加 Storyboard。
4. 卸载 Xcode，重新安装 Xcode。
5. 删除派生数据文件夹。

问题似乎出在我的presentMainScreen()方法上

func presentMainScreen(){
     let mainstoryboard = UIStoryboard(name: "MainTabController", bundle: nil)
      let mainTabController = mainstoryboard.instantiateViewController(withIdentifier: "MainTabController") as! MainTabController
        mainTabController.selectedViewController = mainTabController.viewControllers?[1]
        //let storyboard:UIStoryboard = UIStoryboard(name:"Main", bundle:nil)
        //let loggedInVC:LoggedInVC = storyboard.instantiateViewController(withIdentifier: "LoggedInVC") as! LoggedInVC
        //self.present(loggedInVC, animated: true, completion: nil)
    }

如果我注释掉 mainTabController 行，应用程序将完美运行，如果我取消注释 loggedInVC 行并注释掉 mainTabController 行，它也可以完美运行。

非常感谢任何建议。

下面是我的整个ViewController.swift代码和我工作区的截图

workspace

ViewController.swift

import UIKit
import FirebaseAuth

class ViewController: UIViewController {

    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func viewDidAppear(_ animated: Bool) {


        if Auth.auth().currentUser != nil {
            print("success")

          self.presentMainScreen()
        }
    }

    @IBAction func creatAccountTapped(_ sender: Any) {



        if let email = emailTextField.text, let password = passwordTextField.text {

            Auth.auth().createUser(withEmail: email, password: password, completion:{ user, error in
                if let firebaseError = error {
                print(firebaseError.localizedDescription)
                return
                }
                print("success")
               self.presentMainScreen()

        })

    }
}

@IBAction func loginButtonTapped(_ sender: Any) {



if let email = emailTextField.text, let password = passwordTextField.text {

    Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
        if let firebaseError = error {
            print(firebaseError.localizedDescription)
            return
         }

       print("success")

      self.presentMainScreen()

    })

    }

  }

    func presentMainScreen(){
     let mainstoryboard = UIStoryboard(name: "MainTabController", bundle: nil)
      let mainTabController = mainstoryboard.instantiateViewController(withIdentifier: "MainTabController") as! MainTabController
        mainTabController.selectedViewController = mainTabController.viewControllers?[1]



       //let storyboard:UIStoryboard = UIStoryboard(name:"Main", bundle:nil)
        //let loggedInVC:LoggedInVC = storyboard.instantiateViewController(withIdentifier: "LoggedInVC") as! LoggedInVC
        //self.present(loggedInVC, animated: true, completion: nil)
    }
}

Answer 1

您的 Storyboard的名称是什么？是 MainTabController.storyboard 还是 Main.storyboard？

您正在尝试加载名为“MainTabController”的 Storyboard:

let mainstoryboard = UIStoryboard(name: "MainTabController", bundle: nil)

但之前您将其称为 Main.storyboard:

Fiddle with the Target Membership Main.storyboard.

此外，如果主选项卡 Controller 与您的登录 View Controller 位于同一 Storyboard中，那么您可以尝试使用此:

let mainTabController = self.storyboard.instantiateViewController(withIdentifier: "MainTabController")