Xcode 11 beta: AppDelegate file doesn't have window global variable - xcode

Question

I am facing an issue in Xcode 11 beta.
The problem is that I am not getting default window variable declared in AppDelegate file.
Is anybody facing this same issue?

Answer 1

In Xcode 11 this is now done in SceneDelegate
EDIT: if you’re still supporting iOS 12 or prior (or want to support 13 plus prior)
Add the UIWindowSceneDelegate to ApplicationDelegate
Add : var window:UIWindow?
Then proceed as you would to setting up in didFinishLaunching

Answer 2

The default var window: UIWindow? Is now moved in SceneDelegate.swift. To set a rootViewController in Xcode 11 you can work within SceneDelegate.swift file, In the scene delegate, you must create the window instance and the root view controller like below:
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// set or create your viewController here
let yourViewController = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(identifier: "yourViewController") as! YourViewController
// set the rootViewController here using window instance
self.window?.rootViewController = yourViewController
}
Also this answer is helpful : Why is manually setup root view controller showing black screen?
Hope it will help you!

Answer 3

My approach:
first, in AppDelegate create a static property with the class of the view controller you want to access, like this
class AppDelegate: UIResponder, UIApplicationDelegate {
// MARK: Home
static var homeViewController: HomeViewController?
...
}
then, in the view controller
// MARK: - Managing the view
override func viewDidLoad() {
super.viewDidLoad()
// Singleton
AppDelegate.homeViewController = self
...
}
how to use:
extension UIViewController {
var homeViewController: HomeViewController? {
if let controller = self as? HomeViewController {
return controller
}
return AppDelegate.homeViewController
}
}

Answer 4

In my case, that's all it takes.
var window: UIWindow? // add this by yourself
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
window = UIWindow(frame: Device.bounds)
let root = DDTabBarController()
window?.rootViewController = root
window?.makeKeyAndVisible()
return true
}