iOSの通信処理を簡潔に書く

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1. iOSͰ௨৴ॲཧΛ؆ܿʹॻ͘ 2018/12/25 ΫϦϘονΛٹ͏ձɻ PKPK-Carnage
2. About me • iOSྺ2೥ͪΐͬͱ • খֶੜ͔ΒͣͬͱΞϝίϛ͕޷͖ • Qiita → @PKPK-Carnage • Github → PKPK-Carnage • Twitter → @PKPK-Carnage
3. ౦ژίϛίϯʹߦ͖ͬͯ·ͨ͠
4. ౦ژίϛίϯʹߦ͖ͬͯ·ͨ͠
5. ͜Ε͚ͩΞϝίϛ͕ਓؾʹͳͬͨͷʹɺ Ͳ͏ͯࣗ͠෼͸ҰਓͰίϛίϯʹ͍ΔΜͩɾɾɾ
7. Marvel APIͰΞϓϦΛ࡞Ε͹ɺ ΅ͬͪΛճආͰ͖ΔͷͰ͸ʂʁ
8. Marvel APIͬͯͳΜͩʁ • MarvelͷίϛοΫʹؔ͢Δ৘ใΛऔಘͰ͖ΔWebAPI • ৄ͘͠͸Qiitaʹهࣄॻ͖·ͨ͠(એ఻)
9. ௨৴ॲཧΛ࡞Δ • Swift4.2Λ࢖༻ • ϑϨʔϜϫʔΫ(Alamofire)Λ࢖༻ • CodableͰjsonΛύʔε͢Δ
10. ௨৴ॲཧΛ࡞Δ • Swift4.2Λ࢖༻ • ϑϨʔϜϫʔΫ(Alamofire)Λ࢖༻ • CodableͰjsonΛύʔε͢Δ • ग़དྷΔ͚ͩ؆ܿʹॻ͘ʂ
11. ͱΓ͋͑ͣॻ͍ͯΈΔɻ import Alamofire class APIManager { static func request(urlString: String, parameter: [String: Any], success: @escaping (Data) -> Void, failure: @escaping (Error) -> Void) { // ڞ௨URLΛ݁߹ let url = "https://gateway.marvel.com/v1/public/\(urlString)" // ௨৴Λߦ͏ Alamofire.request(url, parameters: parameter).responseData { response in switch response.result { case .success(let data): success(data) case .failure(let error): failure(error) } } } }
12. ͱΓ͋͑ͣॻ͍ͯΈΔɻ extension APIManager { // ΩϟϥΫλʔͷҰཡΛऔಘ͢ΔAPI static func characterList(parameter: CharacterListRequest, success: @escaping (CharacterListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: "characters", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(CharacterListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } }
13. ͱΓ͋͑ͣॻ͍ͯΈΔɻ
14. ͱΓ͋͑ͣॻ͍ͯΈΔɻ extension APIManager { // ΩϟϥΫλʔͷҰཡΛऔಘ͢ΔAPI static func characterList(parameter: CharacterListRequest, success: @escaping (CharacterListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: “characters", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(CharacterListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } }
15. ͱΓ͋͑ͣॻ͍ͯΈΔɻ 15 extension APIManager { // ίϛοΫͷҰཡΛऔಘ͢ΔAPI static func comicList(parameter: ComicListRequest, success: @escaping (ComicListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: "comics", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(ComicListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } } extension APIManager { // ΠϕϯτͷҰཡΛऔಘ͢ΔAPI static func eventList(parameter: EventListRequest, success: @escaping (EventListResponse) -> Void, failure: @escaping (Error) -> Void) { extension APIManager { // ΩϟϥΫλʔͷҰཡΛऔಘ͢ΔAPI static func characterList(parameter: CharacterListRequest, success: @escaping (CharacterListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: “characters", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(CharacterListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } }
16. શવ؆ܿʹॻ͚ͯͳ͍
17. ֤API͝ͱʹϝιουΛॻ͔ͣʹɺڞ௨Խ͠Α͏
18. enumͱprotocolΛ׆༻͢Δ
19. ProtocolΛ࡞੒͢Δ protocol APIType { var url: String { get } var parameter: [String: Any] { get } } ֤API͝ͱʹඞཁͳϦΫΤετ৘ใΛऔಘ͢ΔͨΊͷProtocolΛ࡞੒͢Δ
20. ҎԼͷೋͭͷAPIͰenumΛ࡞ͬͯΈΔ
21. enumΛ࡞੒͢Δ struct APITypes { private static let baseURL = "http://gateway.marvel.com/v1/public/" enum Character { case list(CharacterListRequest) case comics(CharacterComicListRequest) } }
22. enumΛ࡞੒͢Δ struct APITypes { private static let baseURL = "http://gateway.marvel.com/v1/public/" enum Character: APIType { case list(CharacterListRequest) case comics(CharacterComicListRequest) var url: String { let characterURL = "characters" switch self { case .list: return APITypes.baseURL + characterURL case .comics(let request): return APITypes.baseURL + “\(characterURL)/\(request.id)/comics” } } var parameter: [String : Any] { switch self { case .list(let request): return request.dict case .comics(let request): return request.dict } } } }
23. ࠷ॳ͜͏ͩͬͨڞ௨ϦΫΤετͷॲཧ͕ɾɾɾ import Alamofire class APIManager { static func request(urlString: String, parameter: [String: Any], success: @escaping (Data) -> Void, failure: @escaping (Error) -> Void) { // ڞ௨URLΛ݁߹ let url = "https://gateway.marvel.com/v1/public/\(urlString)" // ௨৴Λߦ͏ Alamofire.request(url, parameters: parameter).responseData { response in switch response.result { case .success(let data): success(data) case .failure(let error): failure(error) } } } }
24. ͜͏ͳΔ import Alamofire class APIManager { static func request(type: APIType, success: @escaping (Data) -> Void, failure: @escaping (Error) -> Void) { // ௨৴Λߦ͏ Alamofire.request(type.url, parameters: type.parameter).responseData { response in switch response.result { case .success(let data): success(data) case .failure(let error): failure(error) } } } }
25. ֤API͝ͱͷϝιου͕ɾɾɾ 25 extension APIManager { // ίϛοΫͷҰཡΛऔಘ͢ΔAPI static func comicList(parameter: ComicListRequest, success: @escaping (ComicListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: "comics", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(ComicListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } } extension APIManager { // ΠϕϯτͷҰཡΛऔಘ͢ΔAPI static func eventList(parameter: EventListRequest, success: @escaping (EventListResponse) -> Void, extension APIManager { // ΩϟϥΫλʔͷҰཡΛऔಘ͢ΔAPI static func characterList(parameter: CharacterListRequest, success: @escaping (CharacterListResponse) -> Void, failure: @escaping (Error) -> Void) { self.request(urlString: “characters", parameter: parameter.dict, success: { data in do { let data = try JSONDecoder().decode(CharacterListResponse.self, from: data) success(data) } catch { failure(error) } }, failure: failure) } }
26. ඞཁແ͘ͳΔʂ
27. ࣮ࡍʹAPIΛୟ͘ͱ͜Μͳײ͡ // ΩϟϥΫλʔͷҰཡΛऔಘ͢Δ func fetchCharacterListData(parameters: CharacterListRequest) { APIManager.request(type: APITypes.Character.list(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) } // ΩϟϥΫλʔ͝ͱͷίϛοΫҰཡΛऔಘ͢Δ func fetchCharacterComicListData(_ parameters: CharacterComicListRequest) { APIManager.request(type: APITypes.Character.comics(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterComicListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) }
28. ͋Εɾɾɾʁ // ΩϟϥΫλʔͷҰཡΛऔಘ͢Δ func fetchCharacterListData(parameters: CharacterListRequest) { APIManager.request(type: APITypes.Character.list(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) } // ΩϟϥΫλʔ͝ͱͷίϛοΫҰཡΛऔಘ͢Δ func fetchCharacterComicListData(_ parameters: CharacterComicListRequest) { APIManager.request(type: APITypes.Character.comics(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterComicListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) }
29. ϨεϙϯεͷσίʔυॲཧΛ ຖճॻ͔͞ΕͯΔ
30. ֤Ϩεϙϯε͝ͱʹσίʔυॲཧΛॻ͔ͣʹɺڞ௨Խ͠Α͏
31. GenericsΛ׆༻͢Δ
32. GenericsΛద༻͢Δ import Alamofire class APIManager { static func request(type: APIType, success: @escaping (Data) -> Void, failure: @escaping (Error) -> Void) { // ௨৴Λߦ͏ Alamofire.request(type.url, parameters: type.parameter).responseData { response in switch response.result { case .success(let data): success(data) case .failure(let error): failure(error) } } } }
33. GenericsΛద༻͢Δ import Alamofire class APIManager<T: Decodable> { static func request(type: APIType, success: @escaping (T) -> Void, failure: @escaping (Error) -> Void) { // ௨৴Λߦ͏ Alamofire.request(type.url, parameters: type.parameter).responseData { response in switch response.result { case .success(let data): do { let decodedData = try JSONDecoder().decode(T.self, from: data) success(decodedData) } catch { failure(error) } case .failure(let error): failure(error) } } } }
34. σίʔυ͕ڞ௨Խ͞ΕΔͱɾɾɾ // ΩϟϥΫλʔͷҰཡΛऔಘ͢Δ func fetchCharacterListData(parameters: CharacterListRequest) { APIManager.request(type: APITypes.Character.list(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) } // ΩϟϥΫλʔ͝ͱͷίϛοΫҰཡΛऔಘ͢Δ func fetchCharacterComicListData(_ parameters: CharacterComicListRequest) { APIManager.request(type: APITypes.Character.comics(parameters), success: { data in do { let response = try JSONDecoder().decode(CharacterComicListResponse.self, from: data) // ௨৴&σίʔυ੒ޭ࣌ͷॲཧ } catch { // σίʔυΤϥʔ࣌ͷॲཧ } }, failure: { error in // ௨৴Τϥʔ࣌ͷॲཧ }) }
35. ͜͏ͳΔ // ΩϟϥΫλʔͷҰཡΛऔಘ͢Δ func fetchCharacterListData(parameters: CharacterListRequest) { APIManager<CharacterListResponse>.request(type: APITypes.Character.list(parameters), success: { data in // ੒ޭ࣌ͷॲཧ(data = CharacterListResponse) }, failure: { error in // ௨৴Τϥʔ΍σίʔυΤϥʔ࣌ͷॲཧ }) } // ΩϟϥΫλʔ͝ͱͷίϛοΫҰཡΛऔಘ͢Δ func fetchCharacterComicListData(_ parameters: CharacterComicListRequest) { APIManager<CharacterComicListResponse>.request(type: APITypes.Character.comics(parameters), success: { data in // ੒ޭ࣌ͷॲཧ(data = CharacterComicListResponse) }, failure: { error in // ௨৴Τϥʔ΍σίʔυΤϥʔ࣌ͷॲཧ }) }
36. ☺
37. ·ͱΊ • ϦΫΤετͷ੾Γ෼͚͸enumͱprotocolͰ؅ཧͰ͖Δ • Ϩεϙϯεͷσίʔυ͸GenericsͰڞ௨Խग़དྷΔ • ΫϦεϚε·ͰʹMarvelͷΞϓϦΛ࡞Γ্͛Δ͜ͱ͕Ͱ͖ͳ ͔ͬͨͷͰ͜͜Ͱൃද͍ͯ͠Δ
38. ͓͠·͍