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iOSΞϓϦ։ൃʹ΋DIπʔϧΛʂ 2018/01/29 Otemachi.swift x Kyobashi.swift #02

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෱ඌ ޾ଠ࿠ (@haptaro) - Sansanגࣜձࣾ Eightࣄۀ෦ - ϞόΠϧΞϓϦΤϯδχΞ - iOSϝΠϯɺAndroid΋গͣͭ͠ 2

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લఏ
 ࣮ࡍʹಋೖͨ͠Θ͚Ͱ͸ͳ͍ɻ

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લఏ
 ࣮ࡍʹಋೖͨ͠Θ͚Ͱ͸ͳ͍ɻ ݕ౼͍ͨ͠ʂ

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ભҠઌͷActivityͷϑΟʔϧυʹ@InjectͬͯΞϊςʔγϣϯ͍ͭͯΔͰ͠ΐʁ
 Dagger͕ίʔυΛࣗಈੜ੒ͯ͠ϑΟʔϧυʹ஋Λ୅ೖͯ͘͠ΕΔ͔Βɺࣗ෼ Ͱੜ੒ͤͣʹstartActivity͍͍ͤͯ͞Αʂ ಉ͡ػೳΛiOSͰ։ൃͨ͋͠ͱ
 AndroidͷίʔυϨϏϡʔʹͯ

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!!!
 (iOSͷͱ͖͸ͳΜ͔৭ʑ࡞ͬͨͷʹ…)

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͔֬ʹAndroidͰ͸DaggerΑ͘ฉ͚͘Ͳɺ iOSͷDIπʔϧ͸Ͳ͏ͳͷͩΖ͏

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iOSͰDIπʔϧΛಋೖ͞Ε͍ͯΔํ

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ຊ೔͓࿩͢Δ͜ͱ - DIͱ͸ʁ - iOSΞϓϦ։ൃͰDIπʔϧΛ࢖͏ͳΒ - ͦͷதͰDIKitͷ৮ͬͯΈͨ 9

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ͦ΋ͦ΋DI(Dependency Injection)ͱ͸ʁ

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ґଘ͍ͯ͠ΔΦϒδΣΫτΛ֎͔ΒೖΕΔ
 σβΠϯύλʔϯ

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ͨͱ͑͹ɺ
 ΦϒδΣΫτAͷΠϯελϯεԽʹ͸ΦϒδΣΫτBͱC͕ඞཁͰɺ
 ΦϒδΣΫτBͷΠϯελϯεԽʹ͸ΦϒδΣΫτD͕ඞཁ A C B D

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ΦϒδΣΫτάϥϑ: ΦϒδΣΫτͷґଘؔ܎Λද͢πϦʔ A C B D

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ͦΕͧΕΦϒδΣΫτΛ֎͔ΒೖΕΔʂ A C B D ϓϩτίϧ

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ͦΕͧΕΦϒδΣΫτΛ֎͔ΒೖΕΔʂ A C B D

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ͲͷΑ͏ʹΦϒδΣΫτΛೖΕΔͷ͔ʁೖΕํ 16 ɾΠχγϟϥΠβInjectionɾɾɾinit()ܦ༝ͰΦϒδΣΫτΛೖΕΔɻҰ൪Α ͘ݟ͔͚Δ͕ɺViewController΍AppDelegateʹ͸࢖͑ͳ͍ ɾϓϩύςΟInjectionɾɾɾ௚઀ϓϩύςΟʹΦϒδΣΫτΛೖΕΔ ɾϝιουInjectionɾɾɾϝιουܦ༝ͰΦϒδΣΫτΛೖΕΔ

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DI͕͋ΔͱԿ͕خ͍͠ͷʁ

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- ΦϒδΣΫτͷґଘؔ܎ΛΫϥεͷ֎ʹग़ͤΔͷͰɺϞδϡʔ ϧੑ্͕͕Γ࠶ར༻Ͱ͖Δ - ίϯϙʔωϯτಉ͕࢜ૄ݁߹ʹͳΓมߋʹॊೈʹͳΔ - ΦϒδΣΫτͷࠩ͠ସ͕͑Մೳʹ
 (ϢχοτςετͷࡍʹϞοΫΦϒδΣΫτͷࠩ͠ସ͑ͳͲ) 18

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- DI͸ʮґଘ͍ͯ͠ΔΦϒδΣΫτΛ֎͔ΒೖΕΔ୯ͳΔσβΠ ϯύλʔϯʯ - ΦϒδΣΫτͷೖΕํʹ΋छྨ͕͋Δ 19

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ͱ͸͍͑ɺґଘؔ܎͕૿͖͑ͯͯ΋खಈͰґ ଘΦϒδΣΫτΛDI͍ͯ͘͠ͷ͔…

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ͦ͜ͰDIαϙʔτπʔϧ✨

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iOSΞϓϦͰ࢖͑ͦ͏ͳDIαϙʔτπʔϧ(Swift) - Swinjectɾɾɾ@yoichitgy͞Μ͕࡞ऀɻDIίϯςφɻݱࡏͷiOSͷDI πʔϧͷσϑΝΫτελϯμʔυʁ - DIKitɾɾɾ@ishkawa͞Μ͕࡞ऀɻ͝ຊਓ͕iOSDC 2017Ͱ঺հ - CleanseɾɾɾSquare੡ 22

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ґଘؔ܎ͷղܾͷλΠϛϯά 23 ɾಈతDIɾɾɾ࣮ߦ࣌ʹґଘؔ܎ͷղܾ
 ex. Swinject
 ɾ੩తDIɾɾɾίϯύΠϧ࣌ʹґଘؔ܎ͷղܾ
 ex. DIKit, Cake PatternΛ༻͍ͨDI, ReaderϞφυΛ༻͍ͨDI

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੩తDI͸ಈతDIΑΓԿ͕ྑ͍ͷʁ - ҆શ: ίϯύΠϧ࣌ͷґଘؔ܎ͷղܾ͕͞ΕΔͷͰɺສ͕Ұؒҧ͍ͬͯͯ΋ ίϯύΠϧΤϥʔʹͳΓɺ࣮ߦ࣌Ϋϥογϡ͸๷͛Δ - ࣮ߦ࣌΋গ͠͸ૣ͘: ґଘؔ܎Λղܾͨ͠ίʔυ͕ίϯύΠϧ࣌ʹͰ͖Δͷ Ͱ࣮ߦ࣌ͷ଎౓Λ্͛ΒΕΔ
 ͨͩ͠ɺن໛ʹΑͬͯ͸ίϯύΠϧ͕࣌ؒ௕͘ͳΔͱ͍͏σϝϦοτ΋͋Δ ͔΋ 24

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Swift͸҆શͳݴޠɻ ΍ͬͺΓίϯύΠϧ࣌ʹґଘؔ܎ͷղܾΛ ͍ͨ͠

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ίϯύΠϧ࣌ʹίʔυΛࣗಈੜ੒ͯ͠ґଘؔ܎ ΛղܾͰ͖ΔDIKitͷExample৮ͬͯΈͨ

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ґଘؔ܎Λఆٛ

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ґଘؔ܎Λఆٛ

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ΠϯελϯεΛఏڙ͢Δ provideϝιουΛఆٛ

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Dependency͔ΒϏϧυ࣌ʹ
 ґଘؔ܎Λղܾ͢ΔίʔυΛࣗಈੜ੒

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Storyboardܦ༝ͷViewController ͷΠϯελϯεԽʹ΋ରԠ

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Storyboardܦ༝ͷViewController ͷΠϯελϯεԽʹ΋ରԠ

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ͲͷΑ͏ʹґଘؔ܎Λղܾ͍ͯ͠Δͷ͔ 33 JavaͷΑ͏ʹΞϊςʔγϣϯ͕Swiftʹ͸ͳ͍ͷͰϓϩτί ϧΛϚʔΫͱͯ͠࢖༻͠ɺSourceKittenͰίʔυղऍɾੜ੒ ੜ੒͞ΕͨίʔυͰґଘؔ܎Λղܾ

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DIKit৮ͬͯΈͯ - Ϗϧυ࣌ʹίʔυ͕ࣗಈੜ੒͞ΕΔͷͰɺ࿙Ε͕͋ΔͱίϯύΠϧ ΤϥʔʹͳΔͷͰΘ͔Γ΍͍͢ - Storyboardܦ༝ͰͷViewControllerΠϯελϯεԽ΋Ͱ͖Δ - Dagger2΍Swinjectʹൺ΂Δͱ͔ͳΓγϯϓϧ
 (ٯʹείʔϓͳͲͷ֓೦͸ࠓ͸ͳ͘ɺDIίϯςφͱ·Ͱ͸͍͔ͳ͍) 34

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·ͱΊ ɾSwiftͳΒ΍ͬͺΓίϯύΠϧ࣌ʹґଘؔ܎Λ ղܾ͍ͨ͠ ɾDIKit͸γϯϓϧͰಋೖίετ͸௿ͦ͏ ɾࠓޙ΋DIKitͷϦϙδτϦWatch͍ͯ͜͠͏

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ͨͩ…

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ɾͦ΋ͦ΋ϓϩμΫτͷن໛΍ෳࡶੑɺϢχοτςετͷ ༗ແʹΑͬͯ͸DIαϙʔτπʔϧΛೖΕͣ·ͣ͸खಈDIͰ ΋ྑ͍͔΋ ɾDIαϙʔτπʔϧʹΑͬͯػೳͷࠩҟ͕͋ΔͷͰԿ͕ద ͍ͯ͠Δ͔൑அ͕ඞཁ

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DIαϙʔτπʔϧΛ࢖͍ͬͯΔํ
 ࠙਌ձʹͰ΋͓࿩ฉ͔ͤͯԼ͍͞

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Your business network

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ࢀߟࢿྉ - DIKit: https://github.com/ishkawa/DIKit - ishkawa͞Μͷϒϩά: http://blog.ishkawa.org/2017/09/18/1505701774/ - iOSΞϓϦͷઃܭͱDependency Injection: https://speakerdeck.com/ yonekawa/iosapurifalseshe-ji-todependency-injection - Swinject: https://github.com/Swinject/Swinject - Dependency Injection in Swift 2.x: https://niconare.nicovideo.jp/watch/kn1091 40