RxSwiftでTwitterの
ライブラリを作ってる話 / RxTwift

Transcript

1. RxSwiftͰTwitterͷ
 ϥΠϒϥϦΛ࡞ͬͯΔ࿩ (͍͍ͩͨ)৽ଔΤϯδχΞ޲͚ٕज़ަྲྀձ vol.6 on 2016/03/12 @mihyaeru21

2. ͓લɺ୭Α • ϛώϟΤϧ @mihyaeru21 • Swift͓͡͞Μ • Kotlin͓͡͞Μ • ͱ͖Ͳ͖PerlϚϯ

3. RxSwift + Twitter

4. RxTwift

5. RxTwift • RxSwiftϕʔε • ґଘؚΊͯSwiftͷΈ • ܕܕܕ • https://github.com/mihyaeru21/RxTwift

6. ͖ͯͱ͏ͳઆ໌ • TwitterͷAPIͱରԠͨ͠ΠϯλϑΣʔε • ApiΫϥε͸ɺ͍ͣΕRestApiʹ໊લ͕มΘΓͦ͏ let api = RxTwift.Api(…) api.get.statuses.homeTimeline()

   GET /statuses/home_timeline

7. ͖ͯͱ͏ͳઆ໌ • શͯͷAPIϝιου͸ObservableΛฦ͢ api.get.statuses.homeTimeline() Observable<Tweet>

8. ͖ͯͱ͏ͳઆ໌ • Observableͷத਎͸JSONͰ͸ͳ͍ΦϒδΣΫτ api.get.statuses.homeTimeline() .subscribeNext { tweet in print("\(tweet.user.name)\n\(tweet.text)") }

9. ͖ͯͱ͏ͳઆ໌ • Observableͷத਎͸JSONͰ͸ͳ͍ΦϒδΣΫτ api.get.statuses.homeTimeline() .subscribeNext { tweet in print("\(tweet.user.name)\n\(tweet.text)") }

   ίʔυิ׬Ͱ͖Δ޾ͤʂʂʂ

10. ͪΐͬͱෳࡶͳྫ • ͋ΔϦετΛऔಘͯ͠ • ͦͷϦετ಺ͷϢʔβʢσϑΥϧτ͸20ਓʣ • ͷ͏ͪɺID͕ۮ਺ͷਓͷʢҙຯෆ໌ͳૢ࡞͚ͩͲྫ͔ͩΒڐͯ͠ʣ • λΠϜϥΠϯΛऔಘͯ͠ʢAPIΛୟ͖·͘Δʣ •

    දࣔ

11. Θʔɺ͍͢͝

12. த਎ͷ࿩

13. த਎ͷ࿩ • OAuth • ΦϒδΣΫτϚοϐϯά • Rx • ެ։APIϝιουͷྫ

14. OAuth • OAuthΛSwiftͰ࣮૷͍ͯ͠ΔϥΠϒϥϦ͸͋Δ • https://github.com/OAuthSwift/OAuthSwift • ͦΜͳʹଟػೳ͸ඞཁͳ͔ͬͨ • ετϦʔϛϯάʹରԠͰ͖ͳͦ͏ •

    ͱ͍͏Θ͚Ͱࣗ࡞ • HMAC-SHA1͚ͩCryptoSwiftʹґଘ • https://github.com/krzyzanowskim/CryptoSwift • ඞཁͳػೳΑΓଟػೳ͗͢Δ͔Βґଘ͔Β֎͍ͨ͠

15. OAuth: ೝূͷϔομΛ࡞Δ෦෼

16. OAuth • Ϧετॲཧͱ͔จࣈྻॲཧ͕׬݁ʹॻ͖΍͍͢ • ʢൺֱର৅ɿObjective-Cʣ • ྫ֎ॲཧ͸nilΛฦ͚ͩ͢ͷखൈ͖ • खൈ͖͚ͩͲ͜Ε͘Β͍ͷॲཧʹ͸े෼

17. ΦϒδΣΫτϚοϐϯά • Argo: https://github.com/thoughtbot/Argo • Swift޲͚ϥΠϒϥϦͰ࠷΋γϯϓϧʢͳίʔυʹͳΔ

18. ΦϒδΣΫτϚοϐϯά • README͔ΒҾ༻ struct User { let id: Int let

    name: String let email: String? let role: Role let companyName: String let friends: [User] }

19. ΦϒδΣΫτϚοϐϯά • README͔ΒҾ༻ extension User: Decodable { static func decode(j:

    JSON) -> Decoded<User> { return curry(User.init) <^> j <| "id" <*> j <| "name" <*> j <|? "email" <*> j <| "role" <*> j <| ["company", "name"] <*> j <|| "friends" } }

20. ΦϒδΣΫτϚοϐϯά • มͳه߸ͱ͔ʹ͍ͭͯ͸ྑ͍ղઆهࣄ͕͋Δ • http://qiita.com/koher/items/300d89136b515291dac4

21. ΦϒδΣΫτϚοϐϯά

22. ΦϒδΣΫτϚοϐϯά ͕ࣜෳࡶ͗ͯ͢ίϯύΠϧͰ͖Ͷʔ͔Β ෼ׂͯͪ͠ΐ

23. ΦϒδΣΫτϚοϐϯά ࠅ͍͚Ͳಈ͘…

24. Rx • RxSwift • https://github.com/ReactiveX/RxSwift • ࠷ۙྲྀߦΓʁͷFRP • http://ninjinkun.hatenablog.com/entry/introrxja

25. Rx • Observable • 1ͭͷPromiseʹෳ਺ͷ஋ΛྲྀͤͯߴػೳԽͨ͠ײ͡ • ObservableΛ࡞ͬͨஈ֊Ͱ͸Կ΋͠ͳ͍ • ୭͔ʹsubscribe͞ΕΔ͜ͱʹΑͬͯىಈ

26. Rx: RxTwiftͰ͸ • APIڞ௨ͷϦΫΤετൃߦ෦෼ • Observable<NSData>

27. Rx: RxTwiftͰ͸ • JSONจࣈྻΛදݱ͢ΔNSDataΛσίʔυ • ArgoʹΑͬͯΦϒδΣΫτʹม׵ • Observable<Tweet> • Observable<User>

    • etc…

28. ެ։APIϝιουͷ࣮૷ྫ

29. ެ։APIϝιουͷ࣮૷ྫ

30. client.get(), client.post() • RxTwiftʹ͓͚ΔObservableͷݯྲྀ • Observable.create()ʹΑͬͯੜ੒ • த਎͸ෳࡶ͔ͩΒׂѪ

31. ެ։APIϝιουͷ࣮૷ྫ

32. Dictionary.createWithNotNil • nilͳཁૉΛল͍ͨDictionaryΛ࡞Δ

33. ެ։APIϝιουͷ࣮૷ྫ

34. Observable<Element>.decode()

35. ฦΓ஋ͷܕͰΦʔόʔϩʔυ ҧ͍͸͜Ε͚ͩ

36. Ϛοϐϯάର৅ͷܕ͸ฦΓ஋͔Βਪ࿦

37. Ϛοϐϯάର৅ͷܕ͸ฦΓ஋͔Βਪ࿦ ͜ΕʹΑͬͯͲͷΦϒδΣΫτ
 ʹϚοϐϯά͢Δ͔ܾ·Δ

38. Ϛοϐϯάର৅ͷܕ͸ฦΓ஋͔Βਪ࿦ ͜ΕʹΑͬͯͲͷΦϒδΣΫτ
 ʹϚοϐϯά͢Δ͔ܾ·Δ

39. Observable<Element>.flatMapSequence() • Observable<[T]> Λ Observable<T> ʹม׵ • ετϦʔϜͱͯ͠ѻ͍΍ͯ͘͢͠Δ • ʢ͜ͷม׵͸ແ͔͘͢΋…ʣ

40. decode()ͷฦΓ஋ͷਪ࿦ • flatMapSequence() • Observable<[Tweet]> -> Observable<Tweet> • decode() •

    Observable<NSData> -> Observable<[Tweet]>

41. ݱঢ়Ͱ͖͍ͯΔൣғ • OAuthೝূʹΑΔ௨৴ • GET/POST status/* ͷAPI • GET lists/*

    ͷAPI • ࣮૷ࡁΈAPIͷϨεϙϯεʹରԠ͢ΔΦϒδΣΫτ • TwitterଆΤϥʔʹରԠ͢ΔΦϒδΣΫτ

42. ࠓޙ࣮૷͢Δൣғ • ೝূͷτʔΫϯऔಘॲཧ • ະ࣮૷ͷREST API • ετϦʔϛϯάAPI • ύϥϝʔλʹԠͯ͡ϨεϙϯεJSONͷߏ଄͕


    มΘΔ͜ͱ΁ͷରԠ • ະ࣮૷ͷΦϒδΣΫτ