App coordinators in iOS
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Write clean code and use best practices. The presentation about App Cordinator pattern in iOS. For more info and examples see https://uptech.team/
![- (void)setupViewHierarchy {
UITabBarController *tabBarVC = (UITabBarController *)self.window.rootViewController;
if ([AppConfig isPaidApp]) {
[self removeViewControllerOfType:[RRUnlockViewController class]
fromTabBarController:tabBarVC];
}
if ([AppConfig isMeditationApp]) {
if (![AppConfig isPaidApp]) {
[self removeViewControllerOfType:[RRFavoriteViewController class]
fromTabBarController:tabBarVC];
}
RRSoundsViewController *soundsVC = [[UIStoryboard storyboardWithName:@"Sounds" bundle:[NSBundle
mainBundle]] instantiateViewControllerWithIdentifier:@"RRSoundsViewController"];
soundsVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Sounds" image:[UIImage
imageNamed:@"icon_sounds"] tag:1];
soundsVC.meditationManager = self.meditationManager;
UINavigationController *soundsNVC = [[UINavigationController alloc]
initWithRootViewController:soundsVC];
RRTimerViewController *timerVC = [[UIStoryboard storyboardWithName:@"Timer" bundle:[NSBundle
mainBundle]] instantiateViewControllerWithIdentifier:@"RRTimerViewController"];
timerVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Timer" image:[UIImage
imageNamed:@"icon_timer"] tag:1];
timerVC.timerManager = self.timerManager;
UINavigationController *timerNVC = [[UINavigationController alloc]
initWithRootViewController:timerVC];
NSMutableArray *allViewControllers = [tabBarVC.viewControllers mutableCopy];
[allViewControllers insertObject:soundsNVC atIndex:0];
[allViewControllers insertObject:timerNVC atIndex:3];
tabBarVC.viewControllers = allViewControllers;
. . .](https://image.slidesharecdn.com/lwocmmc8sfost3dxaurh-signature-da3b1296349789a0ad64ffbdfa6ace75bc9204241f328a30aaca54db6d760f2a-poli-170220153917/85/App-coordinators-in-iOS-3-320.jpg)
![func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let photo = self.data[indexPath.row]
let nextViewController = PhotosViewController(with: photo)
self.navigationController?.pushViewController(nextViewController)
}](https://image.slidesharecdn.com/lwocmmc8sfost3dxaurh-signature-da3b1296349789a0ad64ffbdfa6ace75bc9204241f328a30aaca54db6d760f2a-poli-170220153917/85/App-coordinators-in-iOS-16-320.jpg)
![class AppCoordinator: Coordinator {
private let window: UIWindow
private let dependencies: Dependencies
private var childCoordinators = [Coordinator]()
func start() {
if isLoggedIn {
showContent()
} else {
showAuth()
}
}
}](https://image.slidesharecdn.com/lwocmmc8sfost3dxaurh-signature-da3b1296349789a0ad64ffbdfa6ace75bc9204241f328a30aaca54db6d760f2a-poli-170220153917/85/App-coordinators-in-iOS-32-320.jpg)
App coordinators in iOS
- 3. - (void)setupViewHierarchy { UITabBarController *tabBarVC = (UITabBarController *)self.window.rootViewController; if ([AppConfig isPaidApp]) { [self removeViewControllerOfType:[RRUnlockViewController class] fromTabBarController:tabBarVC]; } if ([AppConfig isMeditationApp]) { if (![AppConfig isPaidApp]) { [self removeViewControllerOfType:[RRFavoriteViewController class] fromTabBarController:tabBarVC]; } RRSoundsViewController *soundsVC = [[UIStoryboard storyboardWithName:@"Sounds" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"RRSoundsViewController"]; soundsVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Sounds" image:[UIImage imageNamed:@"icon_sounds"] tag:1]; soundsVC.meditationManager = self.meditationManager; UINavigationController *soundsNVC = [[UINavigationController alloc] initWithRootViewController:soundsVC]; RRTimerViewController *timerVC = [[UIStoryboard storyboardWithName:@"Timer" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"RRTimerViewController"]; timerVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Timer" image:[UIImage imageNamed:@"icon_timer"] tag:1]; timerVC.timerManager = self.timerManager; UINavigationController *timerNVC = [[UINavigationController alloc] initWithRootViewController:timerVC]; NSMutableArray *allViewControllers = [tabBarVC.viewControllers mutableCopy]; [allViewControllers insertObject:soundsNVC atIndex:0]; [allViewControllers insertObject:timerNVC atIndex:3]; tabBarVC.viewControllers = allViewControllers; . . .
- 5. Model Domain State & Behavior View Controller? ? Mediates Model-View Interactions View? ? Display & Layout
- 8. Model-View Binding Subview Allocation View Controller
- 9. Model-View Binding Subview Allocation Data Fetching View Controller
- 10. Model-View Binding Subview Allocation Data Fetching View Controller Layout
- 11. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation
- 12. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow
- 13. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input
- 14. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation
- 15. Navigation Flow
- 16. func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { let photo = self.data[indexPath.row] let nextViewController = PhotosViewController(with: photo) self.navigationController?.pushViewController(nextViewController) }
- 21. App Coordinator aka Application Controller, Flow Controller
- 22. What does a coordinator do?
- 23. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 24. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 25. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 26. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 27. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 28. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 29. Model-View Binding Subview Allocation Data Fetching View Controller Layout Data Transformation Navigation Flow User Input Model Mutation App Coordinator View Model
- 30. How to use coordinators?
- 31. let dependencies = Dependencies(api: vidmeApi, persistenceManager: realmDB) appCoordinator = AppCoordinator(window: window!, dependencies: dependencies) appCoordinator.start()
- 32. class AppCoordinator: Coordinator { private let window: UIWindow private let dependencies: Dependencies private var childCoordinators = [Coordinator]() func start() { if isLoggedIn { showContent() } else { showAuth() } } }
- 33. func showAuth() { let loginCoordinator = LoginCoordinator(navigationController: self.navigationController, dependencies: self.dependencies) loginCoordinator.delegate = self self.childCoordinators.append(loginCoordinator) loginCoordinator.start() }
- 34. class LoginCoordinator: Coordinator { func start() { let loginViewController = LoginViewController() loginViewController.api = dependencies.api loginViewController.persistenceManager = dependencies.persistenceManager loginViewController.delegate = self navigationController.pushViewController(loginViewController, animated: true) }? ? func loginViewController(viewController: LoginViewController, didLoginUser user: User) { delegate?.userDidLogin(user) } }
- 35. Why coordinators are great?
- 36. 1. View Controllers are isolated
- 37. A B C D
- 38. A B C D Coordinator
- 39. 1. View Controllers are isolated
- 40. 1. View Controllers are isolated 2. View Controllers are reusable
- 41. 1. View Controllers are isolated 2. View Controllers are reusable 3. Every task is encapsulated
- 42. 1. View Controllers are isolated 2. View Controllers are reusable 3. Every task is encapsulated 4. Coordinators are fully in our control
- 43. Thanks ?