How to use old method of setting rootViewController in AppDelegate using Swift

Question

I just started a new project of iOS. I created the project using xcode 11 and iOS 13. When I created project i found out that in order to set our own rootController we have to use sceneDelegate instead of AppDelegate. I want to ask if there is any possibility to use old method of setting rootControllers in AppDelegate instead of using sceneDelegate.

 import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {


    var window : UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        let loginController: HomeViewController = HomeViewController(nibName: "HomeViewController", bundle: nil)

       //        let navController: UINavigationController = UINavigationController(rootViewController: loginController)
               self.window?.rootViewController = loginController
               self.window?.makeKeyAndVisible()
        // Override point for customization after application launch.
        return true
    }
}

Answer 1

Follow these steps to use AppDelegate and opt-out for SceneDelegate

1. Go to Info.plist and remove Application Scene Manifest entry from Info.plist.
2. Remove SceneDelegate.swift
3. Add var window: UIWindow? in your AppDelegate.swift file

4. Delete the UISceneSession Lifecycle code from AppDelegate.swift

   import UIKit
   
   @UIApplicationMain
   class AppDelegate: UIResponder, UIApplicationDelegate {
   
   
   var window : UIWindow?
   
   func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       // Override point for customization after application launch.
        let mainStoryBoard = UIStoryboard(name: "Main", bundle: Bundle.main)
        let loginController = mainStoryBoard.instantiateViewController(withIdentifier: "HomeViewController")
        self.window?.rootViewController = loginController
        self.window?.makeKeyAndVisible()
        return true
   }
   }
   

Make sure to give "HomeViewController" storyboardID to your view controller.

This is how your AppDelegate.swift file should look now. You are good to go!