RxSwiftを用いたアプリ開発の実践

2015/11/27 - オープンソースライブラリ研究会 - iOS Android Rails編@ビズリーチ
https://connpass.com/event/22476/

Transcript

1. 3Y4XJGUΛ༻͍ͨΞϓϦ։ൃͷ࣮ફ
   !HPNJ@OJOHFO
   
2. ࣗݾ঺հ
   •  ౦ژͷ๭ࣾͰಇࣾ͘ச̎೥ੜ •  ࢓ࣄɿ
   όονɾ΢Σϒαʔόʔ(Java)ɾiOSΞϓϦ(Swift) 
   •  ޷͖ͳݴޠ͸
   Java8 / Scala / C# @gomi_ningen
   
3. ࣗݾ঺հ
   •  ౦ژͷ๭ࣾͰಇࣾ͘ச̎೥ੜ •  ࢓ࣄɿ
   όονɾ΢Σϒαʔόʔ(Java)ɾiOSΞϓϦ(Swift) 
   •  ޷͖ͳݴޠ͸
   Java8 / Scala / C# •  ݱ࣌఺Ͱ·ͩiOS։ൃܦݧ̐ϲ݄ఔ౓ͷॳ৺ऀ •  ͱ͋ΔܦҢͰ
   RxSwift
   Λ༻͍ͨΞϓϦΛ࡞ͬͯϦϦʔε͠·ͨ͠ •  RxSwift ͷϓϩμΫτͰͷ࣮ફར༻ʹ͍ͭͯ͝঺հ͠·͢ @gomi_ningen
   
4. 3Y4XJGUͱ͸ʁ
   RP(Reactive Programming)Λ࣮ݱ͢ΔϥΠϒϥϦͷͻͱͭͰ͸͋Δ͕… •  ͦ΋ͦ΋ϦΞΫςΟϒϓϩάϥϛϯάͬͯԿʁ •  ͦΜͳ͜ͱ෼͔ͬͯͳͯ͘΋ϥΠϒϥϦ͸࢖͑Δ
   • 
   Լखʹݴ༿Ͱઆ໌͢Δͱ࣮ଶͱζϨͯࠞཚͷݪҼͱͳΔͷͰ΍Βͳ͍
5. 3Y4XJGUͱ͸ʁ
   RP(Reactive Programming)Λ࣮ݱ͢ΔϥΠϒϥϦͷͻͱͭͰ͸͋Δ͕… •  ͦ΋ͦ΋ϦΞΫςΟϒϓϩάϥϛϯάͬͯԿʁ •  ͦΜͳ͜ͱ෼͔ͬͯͳͯ͘΋ϥΠϒϥϦ͸࢖͑Δ
   • 
   Լखʹݴ༿Ͱઆ໌͢Δͱ࣮ଶͱζϨͯࠞཚͷݪҼͱͳΔͷͰ΍Βͳ͍ Ͱ͸ɺࠓճઆ໌͢Δ͜ͱ͸ʁ •  RxSwift
   ͷجຊతͳ;Δ·͍ʹ͍ͭͯ •  RxSwift / RxCocoa ΛϓϩμΫτʹͲ͏૊ΈࠐΜ͔ͩͱ͍͏࿩ •  ओʹ௨৴ॲཧͱΠϕϯτॲཧͰͷར༻ࣄྫ঺հ
6. 3Y4XJGUͷجຊతͳ;Δ·͍
   
7. 3Y4XJGUͷجຊతͳ;Δ·͍
   ʮHello, worldʯΛϩάग़ྗ
8. 3Y4XJGUͷجຊతͳ;Δ·͍
   ʮHello, worldʯΛϩάग़ྗ UIButton ͷλοϓΠϕϯτऔಘ ϘλϯΛλοϓ͢Δͱϩά͕ग़ྗ͞ΕΔ
9. 3Y4XJGUͷجຊతͳ;Δ·͍
   UITextField
   ͷೖྗΠϕϯτऔಘͱϑΟϧλϦϯά ςΩετϑΟʔϧυ΁ೖྗͯ͘͠ͱɺจࣈ਺͕̏จࣈҎ্ͷͱ͖͚ͩϩάग़ྗ͞ΕΔ ςΩετϑΟʔϧυೖྗຖʹΠϕϯτ͕ൃߦ͞Εɺfilter
   ͷ৚݅ΛΫϦΞͨ͠จࣈྻͷΈɺ subscribeNext
   ʹ౉͞Εɺ࣮ߦ͞ΕΔ
10. 3Y4XJGUͷجຊతͳ;Δ·͍
    UISlider
    ͷมߋΠϕϯτऔಘɺ஋ͷՃ޻ɺUITextField
    ΁ͷόΠϯυ
11. 3Y4XJGUͷجຊతͳ;Δ·͍
    Τϥʔͷ఻೻Λ͍ͤͨ͞ͱ͖ʹ΋ඇৗʹศར ˑ
    ΤϥʔͷऔΓճ͠Λྫ֎Λ࢖Θͣʹߦ͏͜ͱ͕Ͱ͖Δ ɾ
    flatMap಺Ͱ just(஋)
    Λฦͤ͹੒ޭ஋Λ఻೻ͤ͞Δ͜ͱ͕Ͱ͖Δ ɾ
    flatMap಺Ͱ
    failWith(NSError) Λฦͤ͹ΤϥʔΛ఻೻ͤ͞Δ͜ͱ͕Ͱ͖Δ
12. 3Y4XJGU3Y$PDPBΛ༻͍ͨ௨৴ॲཧ
    
13. ௨৴ॲཧؔ࿈Ϋϥεͷߏ଄
    ୯७ͳHTTP௨৴͚ͩΛ੹຿ͱͨ͠HttpClient ΞϓϦͰ༻͍ΔAPIૢ࡞Λ੹຿ͱͨ͠
    ApiClient ΞϓϦ಺Ͱ࢖ΘΕΔσʔλΛੜ੒ͨ͠Γߋ৽ͨ͠Γ͢Δ
    Respository ʢͲͷ૚͔ΒObservableΛฦ͢Α͏ʹ͢Δ͔͸ٞ࿦ͷ༨஍͕͋Δʣ
14. )551ΫϥΠΞϯτͷ࣮૷
    •  NSURLSession ͷ RxCocoa֦ுϝιου
    rx_response
    Λ༻͍Δ •  Observable<(NSData!, NSHTTPURLResponse)> Λฦͯ͘͠ΕΔ
15. )551ΫϥΠΞϯτͷ࣮૷
    •  NSURLSession ͷ RxCocoa֦ுϝιου
    rx_response
    Λ༻͍Δ •  Observable<(NSData!, NSHTTPURLResponse)> Λฦͯ͘͠ΕΔ •  ͜ΕΛੜͰ࢖͏ͷͰ͸ͳ͘ɺΫΤϦ΍ϔομΛ෇Ճͨ͠ΓɺλΠϜΞ ΢τ࣌ؒΛઃఆͰ͖ΔΑ͏ʹ͢ΔɺHTTPΫϥΠΞϯτͷػೳ୯Ґͱ͠ ࣮ͯ૷Λߦ͍·ͨ͠ GitHubͰެ։͍ͯ͠·͢ɿhttps://github.com/53ningen/RxHttp
16. "1*ΫϥΠΞϯτͷ࣮૷
    •  ΞϓϦͰ༻͍Δ΢ΣϒAPIΛϥοϓͨ͠APIΫϥΠΞϯτΛ࡞੒͢Δ •  ਖ਼ৗͳεςʔλείʔυͰ͋Ε͹ɺσγϦΞϥΠζͯ͠ΦϒδΣΫτ ʹϚοϐϯάͨ͠஋Λྲྀ͢ •  ҟৗܥͰ͋Ε͹ɺεςʔλείʔυ΍Ԡ౴ʹԠͨ͡ΤϥʔΛྲྀ͢ •  ਖ਼ৗܥͱҟৗܥΛѻ͑ΔObservable͸ྫ֎తঢ়گͷ఻೻ʹ΋ศར
17. "1*ΫϥΠΞϯτͷ࣮૷
    •  ΠϯλʔϑΣʔε͸ҎԼͷΑ͏ʹར༻͢ΔΤϯυϙΠϯτ͝ͱʹ ɹ
    ϝιουʹ੾Γग़͢ •  ͜͏ͯ͠࡞੒ͨ͠΢ΣϒAPIΫϥΠΞϯτΛ௨ͯ͠ɺϩδοΫΛॻ͘ͱ ɹ
    Τϥʔॲཧ΍σγϦΞϥΠζͳͲͷڞ௨ॲཧ͕ߦΘΕͨঢ়ଶͰσʔλ ɹ
    ͷૢ࡞͕Ͱ͖ΔͷͰɺݟ௨͕͠ྑ͘ͳΔ • 
    APIΫϥΠΞϯτͷ࣮૷͸ංେԽ͠΍͍͢ͷͰ಺෦࣮૷Λ͞Βʹந৅ ɹ
    Խͯ͠΋ྑ͍͔ͱࢥ͍·͢
18. 3Y$PDPBΛ༻͍ͨ6*Πϕϯτॲཧ
    
19. 3Y$PDPBΛ༻͍ͨ6*Πϕϯτॲཧ
    RxCocoaΛimportͯ͠UIίϯϙʔωϯτͷ֦ுϝιουΛར༻͢Δ •  UIKitͷओཁͳίϯϙʔωϯτʹ͸ObservableΛฦͯ͘͠ΕΔ֦ுϝ ιου͕ఆٛ͞Ε͍ͯΔ •  σϦήʔτͰΠϕϯτॲཧΛ͠ͳ͍ܗͷ࣮૷͕Ͱ͖Δ •  ֦ுϝιου͔ΒಘΒΕΔObservableʹରͯ͠΋ map
    ΍ filter ͳͲ ͷίϯϏωʔλΛ༻͍Δ͜ͱ͕Ͱ͖Δ •  UIίϯϙʔωϯτʹରͯ͠ͲΜͳ֦ுϝιου͕ఆٛ͞Ε͍ͯΔ͔ʹ ͍ͭͯ͸ҎԼΛࢀর͢Δͱྑ͍ͱࢥ͍·͢ https://github.com/ReactiveX/RxSwift/blob/master/Documentation/API.md
20. 3Y$PDPBΛ༻͍ͨ6*Πϕϯτॲཧ
    ௨৴݁ՌΛUIίϯϙʔωϯτʹ൓өͤ͞Δ •  ௨৴͸όοΫάϥ΢ϯυεϨουͰɺ݁ՌΛViewʹ൓ө͍ͤͨ͞ͱ͖ ͸ϝΠϯεϨουͰߦ͏ඞཁ͕͋Δ •  εϨουͷ੾Γସ͑ʹ͸
    subscribeOn ͱ
    observeOn Λ༻͍Δ •  ྫ͑͹ҎԼͷΑ͏ͳ۩߹
21. ࣮ߦεϨουͷ੾Γସ͑
    ࢖͏εέδϡʔϥʔʹΑ࣮ͬͯߦઓུ͕มΘΔ 2015-11-08 07:40:48.946 xctest[10944:2734414] background 2015-11-08 07:40:48.946 xctest[10944:2734359] main 2015-11-08 07:40:48.947 xctest[10944:2734423] background 2015-11-08 07:40:48.947 xctest[10944:2734414] background όοΫάϥ΢ϯυͰฒྻʹ࣮ߦ͞Ε͍ͯΔ
22. ࣮ߦεϨουͷ੾Γସ͑
    ࢖͏εέδϡʔϥʔʹΑ࣮ͬͯߦઓུ͕มΘΔ 2015-11-08 07:42:37.552 xctest[11125:2735824] main 2015-11-08 07:42:37.552 xctest[11125:2735881] background 2015-11-08 07:42:37.552 xctest[11125:2735881] background 2015-11-08 07:42:37.552 xctest[11125:2735881] background όοΫάϥ΢ϯυͰ௚ྻʹ࣮ߦ͞Ε͍ͯΔ
    
23. 3YΛར༻͢Δ͜ͱʹΑΔมԽ
    
24. 3YΛར༻͢Δ͜ͱʹΑΔมԽ
    •  ίʔϧόοΫΛ΄ͱΜͲ࢖ΘͣΠϕϯτॲཧͰ͖Δ •  શମతʹΠϯσϯτͷઙ͍ίʔυʹͳΔ •  ίϯτϩʔϥʔʹΠϕϯτॲཧΛू໿Ͱ͖ΔΑ͏ʹͳΔ
25. 3YΛར༻͢Δ͜ͱʹΑΔมԽ
    •  ίʔϧόοΫΛ΄ͱΜͲ࢖ΘͣΠϕϯτॲཧͰ͖Δ •  શମతʹΠϯσϯτͷઙ͍ίʔυʹͳΔ •  ίϯτϩʔϥʔʹΠϕϯτॲཧΛू໿Ͱ͖ΔΑ͏ʹͳΔ •  ఻೻ͤ͞ΔσʔλͷมܗɾϑΟϧλʔͳͲ͕खܰʹߦ͑Δ •  map ΍ filter
    ͳͲ൚༻తͳؔ਺Λར༻Ͱ͖Δ •  ίʔϧόοΫॲཧͷܕ߹ΘͤΛߟ͑Δඞཁ͕ͳ͘ͳΔ •  એݴతʹΠϕϯτॲཧΛѻ͑ΔΑ͏ʹͳΔ
26. 3YΛར༻͢Δ͜ͱʹΑΔมԽ
    •  ίʔϧόοΫΛ΄ͱΜͲ࢖ΘͣΠϕϯτॲཧͰ͖Δ •  શମతʹΠϯσϯτͷઙ͍ίʔυʹͳΔ •  ίϯτϩʔϥʔʹΠϕϯτॲཧΛू໿Ͱ͖ΔΑ͏ʹͳΔ •  ఻೻ͤ͞ΔσʔλͷมܗɾϑΟϧλʔͳͲ͕खܰʹߦ͑Δ •  map ΍ filter
    ͳͲ൚༻తͳؔ਺Λར༻Ͱ͖Δ •  ίʔϧόοΫॲཧͷܕ߹ΘͤΛߟ͑Δඞཁ͕ͳ͘ͳΔ •  એݴతʹΠϕϯτॲཧΛѻ͑ΔΑ͏ʹͳΔ •  ࣦഊͷ఻೻Λྫ֎Ͱ͸ͳ͍ػߏͰ࣮ݱͰ͖Δ •  ྫ֎Λ༻͍ͳ͍ΤϥʔॲཧΛՄೳʹ͢Δ