The default app has not been configured yet

Question

I\'m trying to upgrade my app to the new version of Firebase. I went through the setup guide and edited all of my code to match the new syntax. However, when I run the app,

Answer 1

Swift 5 - Easy Solution

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

return true
}


//MARK:- This function will auto run and firebase will configure successfully
override init() {
    super.init()
        FirebaseApp.configure()
        // not really needed unless you really need it 
        FIRDatabase.database().persistenceEnabled = true
}

Happy Coding