Set Up

gistfile1.swift

class MainTabBarController: UITabBarController {

	let mainCoordinator = MainCoordinator()
	var home: BreathingVC!
	var settings: SettingsVC!
	var presets: PresetsTVC!
	var breathSettings: BreathSettingVC!

	override func viewDidLoad() {
		super.viewDidLoad()
		mainCoordinator.tabCtrl = self

		let home = BreathingVC(coordinator: mainCoordinator, modelCtrl: mainCoordinator.modelController)
		home.tabBarItem = UITabBarItem(title: "Home", image: #imageLiteral(resourceName: "breath"), tag: 0)

		let bvc = BreathSettingVC(mainCoordinator.modelController, coordinator: mainCoordinator)
		bvc.tabBarItem = UITabBarItem(title: "Breath", image: #imageLiteral(resourceName: "settingsSicon"), tag: 1)

		let presets = PresetsTVC(modelCtrl: mainCoordinator.modelController, coordinator: mainCoordinator)
		presets.tabBarItem = UITabBarItem(title: "Presets", image: #imageLiteral(resourceName: "favs"), tag: 2)

		settings = SettingsVC(mainCoordinator.modelController, userCtrl: mainCoordinator.userController, iapCtrl: mainCoordinator.iapController, coordinator: mainCoordinator)
		settings.tabBarItem = UITabBarItem(title: "Theme", image: #imageLiteral(resourceName: "themeicon"), tag: 3)

		let statsvc = StatsViewController(modelCtrl: mainCoordinator.modelController)
		statsvc.tabBarItem = UITabBarItem(title: "Stats", image: #imageLiteral(resourceName: "charticon"), tag: 4)

		viewControllers = [
			UINavigationController(rootViewController: home),
			UINavigationController(rootViewController: bvc),
			UINavigationController(rootViewController: presets),
			UINavigationController(rootViewController: settings),
			UINavigationController(rootViewController: statsvc)
		]
	}
}

protocol Coordinator {
	var childCoordinators: [Coordinator] { get set }
	var navigationController: UINavigationController { get set }
	func start()
}

class MainCoordinator: Coordinator {
	var childCoordinators = [Coordinator]()
	var navigationController: UINavigationController
	var modelController: BreathModelController
	var userController: UserController
	var iapController: IAPController
	var tabCtrl: UITabBarController!

	init(navigationController: UINavigationController = UINavigationController()) {
		self.navigationController = navigationController
		self.userController = UserController()
		self.modelController = BreathModelController()
		self.iapController = IAPController()
	}

	func start() { }
}

// Im setting all this up from the App Delegate - No Storyboards 
	
		// tabBarController = MainTabBarController()
		// window = UIWindow(frame: UIScreen.main.bounds)
		// window?.rootViewController = tabBarController
		// window?.tintColor = .darkGray
		// window?.makeKeyAndVisible()