Going Swift and Beyond // First Wave Swift

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GOING SWIFT AND BEYOND @AYANONAGON DOTSWIFT 2016

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2013

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1. NeXTSTEP 2. OS X 3. iOS

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BORROWED IDEAS

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FIRST WAVE SWIFT

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WHAT HOW WHY

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WHAT

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struct Story { let ID: String let title: String let message: String let sender: User let recipient: User let date: NSDate // ... }

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class StoriesViewController: UIViewController { let stories: [Story] // ... }

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class StoryDetailViewController: UIViewController { init(story: Story) }

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class StoryDetailViewController: UIViewController { private let titleView: StoryTitleView private let senderView: AvatarView private let recipientView: AvatarView private let dateLabel: DateLabel init(story: Story) { titleView = StoryTitleView(story: story) senderView = AvatarView(user: story.sender) recipientView = AvatarView(user: story.recipient) dateLabel = DateLabel(date: story.date) } // ... }

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url_scheme://stories/12345

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class StoryDetailViewController: UIViewController { init(story: Story) }

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class StoryDetailViewController: UIViewController { init(story: Story) init(storyID: String) }

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class StoryDetailViewController: UIViewController { let storyID: String private var titleView: StoryTitleView? private var senderView: AvatarView? private var recipientView: AvatarView? private var dateLabel: DateLabel? init(story: Story) { /* Same as before */ } init(storyID: String) { self.storyID = storyID titleView = nil senderView = nil recipientView = nil dataLabel = nil } // Load everything from API in viewDidLoad? }

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class StoryContainerViewController: UIViewController { let storyID: String init(storyID: String) { self.storyID = storyID } override func viewDidLoad() { client.showStory(ID: storyID) { result in switch result { case .Success(let story): let viewController = StoryDetailViewController(story: story) self.addChildViewController(viewController) self.view.addSubview(viewController.view) viewController.view.frame = view.bounds viewController.didMoveToParentViewController(self) case .Error(let error): // Show error } } } }

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url_scheme://stories/12345 StoryContainerViewController(storyID: "12345")

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url_scheme://stories/12345

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url_scheme://stories/12345 url_scheme://users/007

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url_scheme://stories/12345 url_scheme://users/007 url_scheme://messages/9876

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protocol RemoteContentCoordinator { typealias Content func fetchContent(completion: Result -> Void) func viewControllerForContent(content: Result) -> UIViewController }

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class RemoteContentContainerViewController: UIViewController { let coordinator: T init(coordinator: T) { self.remoteContentCoordinator = remoteContentCoordinator super.init(nibName: nil, bundle: nil) } override func viewDidLoad() { super.viewDidLoad() coordinator.fetchContent { content in let viewController = self.coordinator.viewControllerForContent(content) self.addChildViewController(viewController) self.view.addSubview(viewController.view) viewController.view.frame = view.bounds viewController.didMoveToParentViewController(self) } } }

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struct StoryCoordinator: RemoteContentCoordinator { let ID: String func fetchContent(completion: Result -> Void) { client.showStory(ID: ID, completion: completion) } func viewControllerForContent(content: Result) -> UIViewController { switch content { case .Success(let story): return StoryDetailViewController(story: story) case .Error(_): return ErrorViewController(title: "Could not find story.") } } }

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url_scheme://stories/12345 let coordinator = StoryCoordinator(ID: "12345") RemoteContentContainerViewController(coordinator: coordinator)

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url_scheme://users/007 let coordinator = UserCoordinator(ID: "007") RemoteContentContainerViewController(coordinator: coordinator)

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url_scheme://messages/9876 let coordinator = MessageCoordinator(ID: "9876") RemoteContentContainerViewController(coordinator: coordinator)

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HOW

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SWIFT IS OPEN-SOURCE

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GITHUB.COM/APPLE/ SWIFT

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GITHUB.COM/APPLE/ SWIFT-EVOLUTION

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80% PLANNING 20% CODING

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WHY

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GENERICS ENUMS PROTOCOLS

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GENERICS ENUMS PROTOCOLS

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OPTIONALS VALUE-TYPES FUNCTIONAL

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OPTIONALS VALUE-TYPES FUNCTIONAL

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SO, WHY?

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SHIP A GREAT PRODUCT THAT USERS LOVE

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SHARE > Write > Speak > Recommend books / articles

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TRY

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TRY > Fix a bug in backend or web code > Learn a different language > Talk about architecture with an Android(!) engineer

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INCLUDE

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INCLUDE > Get them excited about Swift > Be open to unfamiliar ideas > Be welcoming