AppDelegate.swift

import UIKit
import RxFlow
import RxSwift
import RxCocoa

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    let disposeBag = DisposeBag()
    var window: UIWindow?
    var coordinator = Coordinator()
    let movieService = MoviesService()
    lazy var mainFlow = {
        return MainFlow(with: self.movieService)
    }()

    func application(_ application: UIApplication,
                     didFinishWithOptions options: [UIApplicationLaunchOptionsKey: Any]?)
                     -> Bool {

        guard let window = self.window else { return false }

        Flows.whenReady(flow: mainFlow, block: { [unowned window] (root) in
            window.rootViewController = root
        })

        coordinator.coordinate(flow: mainFlow,
                               withStepper: OneStepper(withSingleStep: DemoStep.apiKey))

        return true
    }
}