Application Coordinator

Anton Hudz

Transcript

1. Application Coordinator Anton Hudz iOS Developer @ Riseapps
2. Agenda • Common problems • Definition • Responsibilities • How to use • Sample • Links
3. Common problems Massive AppDelegate
4. Common problems Massive View Controllers with too many responsibilities
5. Definition VC A VC B VC C
6. Definition VC A VC B VC C Coordinator
7. Definition Coordinator 1 Coordinator 2 Coordinator 3 Application Coordinator Child Coordinator 1 Child Coordinator 2
8. Responsibilities - Coordinator • Navigate controllers • Model mutation
9. Responsibilities - Controller • Fetch data • Transform it to present • Display it • Notify coordinator
10. How to use • New or existing project • Group your project by flows • Flow -> Coordinator
11. Sample - AppDelegate class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? private let coordinatorFactory = CoordinatorFactory() private lazy var applicationCoordinator: ApplicationCoordinatorOutput = self.make func application(_ application: UIApplication, didFinishLaunchingWithOptions laun configureWindow() return true } } extension AppDelegate { private func configureWindow() { window = UIWindow(frame: UIScreen.main.bounds) applicationCoordinator.start() } private func makeApplicationCoordinator() -> ApplicationCoordinatorOutput { return self.coordinatorFactory.makeApplicationCoordinator(window: window!) } }
12. Sample - ApplicationCoordinator func start() { window.makeKeyAndVisible() runFlow1() } private func runFlow1() { let flow1Coordinator = coordinatorFactory.makeFlow1Coordinator(navigationController: flow1Coordinator.finishFlow = { [weak self, weak flow1Coordinator] in self?.removeDependency(flow1Coordinator) self?.runFlow2() } addDependency(flow1Coordinator) flow1Coordinator.start() } private func runFlow2() { let flow2Coordinator = coordinatorFactory.makeFlow2Coordinator(navigationController: flow2Coordinator.finishFlow = { [weak self, weak flow2Coordinator] in self?.removeDependency(flow2Coordinator) self?.runFlow1() } addDependency(flow2Coordinator) flow2Coordinator.start() }
13. Sample - Flow Coordinator func start() { showB() } } extension Flow2Coordinator { private func showB() { let controllerBOutput = factory.makeControllerB() controllerBOutput.onFinishFlow = { [weak self] in self?.finishFlow?() } controllerBOutput.onNext = { [weak self] in self?.showC() } router.setRoot(module: controllerBOutput) } private func showC() { let controllerCOutput = factory.makeControllerC() controllerCOutput.onBack = { [weak self] in self?.router.popModule(animated: true) } router.push(controllerCOutput, animated: true, completion: nil) } }
14. Sample - Controller protocol ControllerBOutput: BaseViewType { var onFinishFlow: (() -> Void)? { get set } var onNext: (() -> Void)? { get set } } final class ControllerB: BaseViewController, ControllerBOutput { var onFinishFlow: (() -> Void)? var onNext: (() -> Void)? @IBAction private func nextAction() { onNext?() } @IBAction private func finishFlowAction() { onFinishFlow?() } }
15. Origin links: • http://khanlou.com/2015/10/coordinators-redux/ • https://github.com/AndreyPanov/ApplicationCoordinator My demo project: https://github.com/hudzanton/ApplicationCoordinator Links
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