为什么 DetailViewController 使用 Tabbar 和 Navigation Controller 弹出到第一个 DetailViewController?

问题描述

首先我是使用故事板.我的 ViewController 层次结构像这样 NavigationController ->启动画面 ->登录屏幕 ->MainTabBarController ->MainNavigationController ->主视图控制器 ->细节视图控制器.

First of all I am using storyboard. My ViewController hierarchy like this NavigationController -> SplashScreen -> LoginScreen -> MainTabBarController -> MainNavigationController -> MainViewController -> DetailViewController.

当我点击 DetailViewController 页面上的按钮时，不会返回到 MainViewController.它将转到 LoginScreen.

When I click a button on the DetailViewController page does not back to MainViewController. It is going to LoginScreen.

我在 DetailViewController 中的 addToBasket 操作中尝试了此代码.

I tried this codes within addToBasket action in DetailViewController.

@IBAction func addBasket(_ sender: Any) {

SingletonCart.sharedFood.food.append(food!)

let mainView = self.storyboard?.instantiateViewController(withIdentifier: "FoodOrder") as! MainViewController
let appDelegate = UIApplication.shared.delegate as! AppDelegate

self.navigationController?.popViewController(animated: true)
        dismiss(animated: true)

    }

这是我将 MyTabBarController 设为 rootViewController 的 loginButton 代码.

Here is my loginButton codes for make MyTabBarController as rootViewController.

 @IBAction func loginButton(_ sender: Any) {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let viewController = storyboard.instantiateViewController(withIdentifier: "MainTabBarController")
    self.window?.rootViewController = viewController
}

推荐答案

在您的方法中，RootViewController 是登录屏幕的导航控制器，因此会出现此问题.

In your approach the RootViewController is Navigation controller of Login screen therefore this issue occurs.

您的方法应如下所示:

A) NavigationController -> SplashScreen -> LoginScreen

A) NavigationController -> SplashScreen -> LoginScreen

B) MainTabBarController -> MainNavigationController -> MainViewController -> DetailViewController

B) MainTabBarController -> MainNavigationController -> MainViewController -> DetailViewController

当用户登录时，你应该用 B) MainTabBarController 替换你的 window.rootViewController

When user logged in, you should replace your window.rootViewController with B) MainTabBarController

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