Clean Swift A better architecture to make project testable iOS@Taipei 艾倫 Ni & William Kuo

What is Clean Swift?

ViewController

Scene

Interactor Presenter ViewController

ViewController Interactor Presenter Display
 Logic Business
 Logic Presentation
 Logic ViewController Interactor Presenter Display
 Logic Business
 Logic Presenta tion
 Logic

ViewControll Interact Presenter Display
 Logic Business
 Logic Presentation
 Logic Worker Worker Worker

Worker ORM / DB Local API Network / API Network API ViewControll Interact Presenter Display
 Logic Business
 Logic Presentation
 Logic

Worker ViewControll Interact Presenter Display
 Logic Business
 Logic Presentation
 Logic I13N Calculate Thumbnail resize Parse video’s metadata

Interactor Presenter ViewController Request Response ViewModel

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Boundary

viewContorller interactor presentor in out in out DisplayLogic in out Boundary Boundary Boundary BusinessLogic Presentation Logic

protocol MeetupEventListDisplayLogic: AnyObject { func displayMeetupEvents(viewModel: MeetupEventList.FetchEvents.ViewModel) func displayUpdateHistoryEvent(viewModel: MeetupEventList.UpdateHistoryEvent.ViewModel) } final class MeetupEventListViewController: UIViewController, MeetupEventListDisplayLogic { } protocol MeetupEventListBusinessLogic { func fetchMeetupEvents(request: MeetupEventList.FetchEvents.Request) func tapFavorite(request: MeetupEventList.TapFavorite.Request) func subscribeFavoriteUpdate(request: MeetupEventList.SubscribeFavoriteUpdate.Request) func unsubscribeFavoriteUpdate(request: MeetupEventList.UnsubscribeFavoriteUpdate.Request) } final class MeetupEventListInteractor: MeetupEventListBusinessLogic { } protocol MeetupEventListPresentationLogic { func presentMeetupEvents(response: MeetupEventList.FetchEvents.Response) func presentUpdateHistoryEvent(response: MeetupEventList.UpdateHistoryEvent.Response) } final class MeetupEventListPresenter: MeetupEventListPresentationLogic { }

BusinessLogic in out Boundary private func private func private func private func Test

What’s more?

ViewController Interactor DataStore Router Data Passing Routing

Workshop Practice

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基礎版 進階版

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Interactor Presenter ViewController Request Response ViewModel struct Request { } struct ViewModel { let historyEvents: [] let recentlyEvents: [] } struct Response { let recentlyEvents: [EventResponseItem] let historyEvents: [EventResponseItem] }

enum MeetupEventList { enum FetchEvents { struct Request { } struct Response { let recentlyEvents: [EventResponseItem] let historyEvents: [EventResponseItem] } struct ViewModel { let historyEvents: [DisplayHistoryEvent] let recentlyEvents: [DisplayRecentlyEvent] } } }

Presentation Model

struct DisplayRecentlyEvent { let id: String let title: String let dateText: String let hostName: String let coverImageURL: URL? }

struct DisplayHistoryEvent { let id: String let title: String let dateText: String let hostName: String let coverImageURL: URL? let favoriteButtonColor: UIColor }

How?

class MeetupEventListViewController: UIViewController { } var recentlyEvents: [MeetupEvent] = [] var historyEvents: [MeetupEvent] = [] ViewController (MVC)

var recentlyEvents: [MeetupEventList.DisplayRecentlyEvent] = [] var historyEvents: [MeetupEventList.DisplayHistoryEvent] = [] protocol MeetupEventListDisplayLogic: AnyObject { func displayMeetupEvents( viewModel: MeetupEventList.FetchEvents.ViewModel ) } class MeetupEventListViewController: UIViewController, MeetupEventListDisplayLogic { } ViewController (Clean Swift)

meetupEventListAPI.fetchMeetupEvents { [weak self] result in guard let self = self else { return } switch result { case let .success((recentlyEvents, historyEvents)): self.recentlyEvents = self.recentlyEvents self.historyEvents = self.historyEvents self.tableView.reloadData() case let .failure(error): print("#### error -> \(error)") } } loadData( ) (MVC)

let request: MeetupEventList.FetchEvents.Request = .init() interactor?.fetchMeetupEvents(request: request) loadData( ) (Clean Swift)

func configureCell(with meetupEvent: MeetupEvent) { titleLabel.text = meetupEvent.title hostNameLabel.text = meetupEvent.hostName if let eventDate = meetupEvent.date { dateLabel.text = getDateText(with: eventDate) } else { dateLabel.text = "" } coverImageView.image = nil if let coverImageUrl = meetupEvent.coverImageLink, let url = URL(string: coverImageUrl) { coverImageView.isHidden = false coverImageView.kf.setImage(with: url) } else { coverImageView.isHidden = true } } Configure Cell (MVC)

func configureCell( with meetupEvent: MeetupEventList.DisplayRecentlyEvent ) { titleLabel.text = meetupEvent.title hostNameLabel.text = meetupEvent.hostName dateLabel.text = meetupEvent.dateText coverImageView.image = nil if let url = meetupEvent.coverImageURL { coverImageView.isHidden = false coverImageView.kf.setImage(with: url) } else { coverImageView.isHidden = true } } Configure Cell (Clean Swift)

protocol MeetupEventListBusinessLogic { func fetchMeetupEvents( request: MeetupEventList.FetchEvents.Request ) } class MeetupEventListInteractor: MeetupEventListBusinessLogic{ var fetchMeetupEventWorker: MeetupEventListAPIWorker func fetchMeetupEvents( request:MeetupEventList.FetchEvents.Request ) { } } Interactor (Clean Swift)

protocol MeetupEventListPresentationLogic { func presentMeetupEvents( response: MeetupEventList.FetchEvents.Response ) } class MeetupEventListPresenter:MeetupEventListPresentationLogic { func presentMeetupEvents( response: MeetupEventList.FetchEvents.Response ){ } } Presenter (Clean Swift)

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