Custom URL Schemeを支える技術

potatotips #53
https://potatotips.connpass.com/event/92905/
https://github.com/potatotips/potatotips/wiki/potatotips-53

https://techlife.cookpad.com/entry/2018/06/01/113000
https://github.com/giginet/Crossroad

Transcript

1. Custom URL Scheme Λࢧ͑Δٕज़ #potatotips 53 @giginet
2. ୭ • @giginet • ϞόΠϧج൫ @ Cookpad Inc. • iOSDCొஃ͠·͢ • ৄղFastfile •
5. 30Ҏ্ͷURL Scheme
6. ໰୊఺ • ར༻ՄೳͳSchemeͷҰཡੑ͕௿͍ • URLதʹؚ·ΕΔจࣈྻ΍Query Parameterͷ ύʔε͕໘౗
8. pokedex://pokemons/25
9. let url = URL(string: "pokedex://pokemons/25")! let components = url.pathComponents if url.scheme == "pokedex" { if url.host == "pokemons" { if components.count == 2, let pokedexID: Int = Int(components[1]) { presentPokemonDetailViewController(of: pokedexID) } else if ( ... ) { } else { // ... } } }
10. let url = URL(string: "pokedex://pokemons/25")! let components = url.pathComponents if url.scheme == "pokedex" { if url.host == "pokemons" { if components.count == 2, let pokedexID: Int = Int(components[1]) { presentPokemonDetailViewController(of: pokedexID) } else if ( ... ) { } else { // ... } } }
11. giginet/Crossroad • URLSchemeΛϧʔςΟϯάͯ͠URL͔Β؆୯ ʹ஋Λऔಘ͢Δ΍ͭ
12. import Crossroad class AppDelegate: UIApplicationDelegate { let router: DefaultRouter = { let router = DefaultRouter(scheme: "scheme") router.register([ ("scheme://search", { _ in return true }), // ... ]) return router }() func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey: Any]) -> Bool { return router.openIfPossible(url, options: options) } }
13. let router = DefaultRouter(scheme: "pokedex") router.register([ ("pokedex://pokemons", { context in let type: Type? = context.parameter(for: "type") presentPokedexListViewController(for: type) return true }), ("pokedex://pokemons/:pokedexID", { context in guard let pokedexID: Int = try? context.arguments(for: "pokedexID") else { return false } guard let pokemon = Pokedex.find(by: pokedexID) else { return false } presentPokemonDetailViewController(of: pokedexID) return true }), ]) router.openIfPossible(url)
14. let router = DefaultRouter(scheme: "pokedex") router.register([ ("pokedex://pokemons", { context in let type: Type? = context.parameter(for: "type") presentPokedexListViewController(for: type) return true }), ("pokedex://pokemons/:pokedexID", { context in guard let pokedexID: Int = try? context.arguments(for: "pokedexID") else { return false } guard let pokemon = Pokedex.find(by: pokedexID) else { return false } presentPokemonDetailViewController(of: pokedexID) return true }), ]) router.openIfPossible(url) pokedex://pokemons/25 25
15. public protocol Extractable { static func extract(from: String) -> Self? } extension Int: Extractable { public static func extract(from string: String) -> Int? { return Int(string) } } let pokedexID: Int? = try? context.arguments(for: "pokedexID")
16. pokedex://pokemons?type=fire
17. enum Type: String, Extractable { case normal // ϊʔϚϧλΠϓ case fire // ΄ͷ͓λΠϓ case water // ΈͣλΠϓ case grass // ͘͞λΠϓ // ... }
18. public extension RawRepresentable where Self: Extractable, Self.RawValue == String { public static func extract(from string: String) -> Self? { return Self(rawValue: string) } }
19. // match pokedex://pokemons?type=fire ("pokedex://pokemons", { context in let type: Type? = context.parameters(for: "type") // ϙέϞϯҰཡը໘Λදࣔ͢Δ presentPokemonListViewController(of: type) return true })
20. pokedex://pokemons?type=water,grass
21. // pokedex://pokemons?types=water,grass let types: [Type]? = context.parameters(for: "types") // [.water, .grass]
22. extension Array: Extractable where Array.Element: Extractable { static func extract(from string: String) -> [Element]? { let components = string.split(separator: ",") return components .map { String($0) } .compactMap(Element.extract(from:)) } }
23. Dynamic Member Lookup
24. @DynamicMemberLookup • ಈతͳϓϩύςΟੜ੒͕ՄೳʹͳΔ౶ҥߏจ • Swift 4.2͔Βར༻Մೳ
25. @dynamicMemberLookup struct Container { let values: [String: Any] subscript<T>(dynamicMember member: String) -> T? { if let value = values[member] { return value as? T } } } let container = Container(values: ["name": "Pikachu"]) let name: String = container.name // Pikachu
26. // match pokedex://pokemons/:pokedexID // before let pokedexID: Int? = try? context.arguments(for: "pokedexID") // after let pokedexID: Int? = context.arguments.pokedexID
27. @dynamicMemberLookup public struct ArgumentContainer { private let arguments: [String: String] public func fetch<T: Extractable>(for key: String) throws -> T { if let argument = arguments[key] { if let value = T.extract(from: argument) { return value } } throw Error.parsingArgumentFailed } public subscript<T: Extractable>(dynamicMember member: String) -> T? { return try? fetch(for: member) } }
28. https://techlife.cookpad.com/entry/ 2018/06/01/113000
29. ࠷ۙ
31. ·ͱΊ • େن໛ͳURL Schemeʹ͸Crossroadศར • Swift 4.2ͷ@DynamicMemberLookup • OSS΍ͬͯΔͱϩΰ࡞ͬͯ͘ΕΔਓ͕͍ͯ༏͠ ͍ੈք • ⭐͍ͩ͘͞
32. ͝ਗ਼ௌ ͋Γ͕ͱ͏͍͟͝·ͨ͠