RootViewController is return with nil value and do not restart the app correctly

[fo24]

Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

[MoathOthman]

@fo24 can you provide more info, e.g. which xcode version , and ios , are you using scene delegate because i have not tried it there yet ?

[fo24]

@MoathOthman Many thanks for reply. i work with Xcode11 and swift5 And this is my AppDelegate `import UIKit import MOLH

@UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate ,MOLHResetable { var window: UIWindow? func reset() { let rootviewcontroller: UIWindow = ((UIApplication.shared.delegate?.window)!)! let stry = UIStoryboard(name: "Main", bundle: nil) rootviewcontroller.rootViewController = stry.instantiateViewController(withIdentifier: "rootnav") }

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    MOLH.shared.activate(true)

    return true
}`

[MoathOthman]

@fo24 are you using the demo project? i think you might have forgotten to set the initial view controller in the main storyboard or something like that.

[fo24]

@MoathOthman I already make it but in app delegate i added var window: UIwindow? manually

[MoathOthman]

@fo24 I will try to start the project with xcode11 and see what is the issue, if you could solve it as well before, please let us know here ! thnx

[fo24]

@MoathOthman i already uploaded the project in github i will invite you.

[MoathOthman]

@fo24 This behavior occurs because with the new scene delegate, since now on ipados an app can have multiple scenes and hence multiple rootviewcontroller so there is no shared uiapplication that has a single rootviewcontroller anymore. if you are target ios 12 or you are not supporting iPadOS or you don't want to support multiple windows , then you can remove all the scene delegates code and you should be fine .. i pushed the code in a new branch on ur repo. This is causing an issue in the library as well and i will try to fix it soon. thnx

[fo24]

Many thnx i will close the issue.

[MoathOthman]

your welcome :)

[Emy87aa]

Did you solved it, because i'm facing the same problem now.

[supergenedy]

I made a solution for this issue till MoathOthman updates the lib you can add this func in your AppDelegate it gets the window from SceneDelegate

 @available(iOS 13.0, *)
    func swichRoot(){
        //Flip Animation before changing rootView
        animateView()

        // switch root view controllers
        let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
        let nav = storyboard.instantiateViewController(withIdentifier: "HomeView")

        let scene = UIApplication.shared.connectedScenes.first
        if let sd : SceneDelegate = (scene?.delegate as? SceneDelegate) {
            sd.window!.rootViewController = nav
        }

    }
   @available(iOS 13.0, *)
    func animateView() {
        var transition = UIView.AnimationOptions.transitionFlipFromRight
        if !MOLHLanguage.isRTLLanguage() {
            transition = .transitionFlipFromLeft
        }
       animateView(transition: transition)
    }

    @available(iOS 13.0, *)
    func animateView(transition: UIView.AnimationOptions) {
        if let delegate = UIApplication.shared.connectedScenes.first?.delegate {
            UIView.transition(with: (((delegate as? SceneDelegate)!.window)!), duration: 0.5, options: transition, animations: {}) { (f) in
            }
        }
    }

You can check if ios > 13 then call this func from the AppDelegate

        if #available(iOS 13.0, *) {
                let delegate = UIApplication.shared.delegate as? AppDelegate
                delegate!.swichRoot()
        } else {
               // Fallback on earlier versions
               MOLH.reset()
        }

And also check if ios > 13 in the reset func in the AppDelegate to call swichRoot func