AppDelegate.swift

import UIKit
import RxSwift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    
    var window: UIWindow?
    private var appCoordinator: AppCoordinator!
    private let disposeBag = DisposeBag()

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        window = UIWindow()
        
        appCoordinator = AppCoordinator(window: window!)
        appCoordinator.start()
            .subscribe()
            .disposed(by: disposeBag)
        
        return true
    }
}