3年間作り続けて来たアプリをSwift化した話

by sun54907

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3೥ؒ࡞Γଓ͚͖ͯͨ ΞϓϦΛSwiftԽͨ͠࿩

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ࣗݾ঺հ ւ઒ ࿨໻ 28ࡀ (ג)ϚονϯάΤʔδΣϯτ iOSྺ 5೥ ޷͖: ͳΊ͜ ࠷ۙͷϚΠϒʔϜɿFGOɺFE ώʔϩʔζ

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ฐࣾΞϓϦ঺հ

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λοϓϧ஀ੜ ϚονϯάαʔϏε 2013೥12݄͔Β։ൃɻ ཌ5݄ɺϦϦʔε 2017೥ݱࡏɺDAU11ສ (͏ͪiOS6ສ)

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λοϓϧ஀ੜ iOS൛ SwiftԽϓϩδΣΫτ

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໨࣍ ίʔυͷ಺༁ Obj-C → Swift 2.3 Swift 2.3 → Swift 3.0

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ίʔυͷ಺༁

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ίʔυͷ಺༁ SwiftԽ͢Δલ Objective-C 99.5% ݱࡏ Objective-C 81.2% Swift 18.6%

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ίʔυͷྔ Swift͢Δલ .m, .hϑΝΠϧ߹Θͤͯ600ϑΝΠϧఔ౓ ܭ60,000ߦ

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Objective-C → Swift 2.3

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͖͔͚ͬ ௕͍ϓϩδΣΫτͳͷͰɺٕज़తෛ࠴͕ଟ͍ ࢪࡦʹ௥ΘΕ͍ͯΔঢ়گ Ұճ͔ͬ͠Γͱվળ͚ͩΛ͍ͨ͠ 2016೥11݄ɺվળͷͨΊɺ։ൃ߹॓Λ͢Δ͜ͱʹ ͳͬͨ

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։ൃ߹॓ͷৄ͍͠࿩͸ͪ͜Β https://developers.cyberagent.co.jp/blog/ archives/2055/

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SwiftԽϩʔυϚοϓ 1ധ2೔ͷ։ൃ߹॓ͰҰؾʹ΍Γ͖Δ ໨ඪ͸SwiftԽ100%! iOSΤϯδχΞ͸2ਓɺ࡞ۀ࣌ؒ͸16࣌ؒ΄Ͳɻܭ32 ࣌ؒ ίϯόʔλʔΛ࢖ͬͯҰؾʹม׵ ͱΓ͋͑ͣಈ͘Α͏ʹͯ͠ɺޙͰϦϑΝΫλϦϯά

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ίϯόʔλͷछྨ Swiftify iSwift objc2swift

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Swiftify ֹ݄14.99$ ແྉͩͱ10KB·ͰͷίʔυΛม׵Ͱ͖Δ ༗ྉͳΒϑΝΠϧ͝ͱɺϓϩδΣΫτ͝ͱม׵Մೳ Swift2.2, 3.0 ʹม׵Մೳ

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iSwift ༗ྉ(14.99$) ΢Σϒ্Ͱม׵Մೳ MacΞϓϦ͕͋Γɺ1೔͚ͩແྉମݧͰ͖Δ Swift2.2, 3.0ʹม׵Մೳ

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objc2swift ແྉ ίϚϯυϥΠϯ͔Βม׵Ͱ͖Δ hϑΝΠϧɺmϑΝΠϧΛҰॹʹม׵͢Δ Swift2.xʹม׵Ͱ͖Δ Yahooͷਓ͕࡞ͬͨ

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બ͹Εͨͷ͸…

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objc2swiftΛ࠾༻ ແྉʂ ίϚϯυϥΠϯ͍͍ͬͯ yahoo࡞੒ͱ͍͏৴པײ http://qiita.com/shu223/items/ 7a20d97d93e056a4e0ac

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Start!

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ૣ଎น͕…

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* ※౰࣌ͷ΋ͷͰ͸ͳ͘ɺswift3ରԠޙʹ΍ͬͨ΋ͷͳͷͰɺ AnyHashableͱ͔࢖ͬͯ·͢

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☠ܯࠂࡇΓ☠ ม׵͚ͩͰऴΘΔ͜ͱ͸100%ͳ͍ XcodeͷαδΣετ͕ग़Δܯࠂ͕൒෼͘Β͍ ࢒Γ൒෼͸ࣗྗͰͲ͏ʹ͔͢Δ͔͠ͳ͍ ͍͍ͩͨ100ߦ͘Β͍Ͱ40ݸ΄Ͳܯࠂ͕ग़Δ

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* ※౰࣌ͷ΋ͷͰ͸ͳ͘ɺswift3ରԠޙʹ΍ͬͨ΋ͷ ͜ΕΛ

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͜ͷঢ়ଶ·Ͱ15෼ ~ 30෼͘Β͍͔͔Δ !ͱ͔࢖ͬͯΔͷͰ·ͩमਖ਼͕ඞཁͩ͠ɺϩδοΫ͕ਖ਼͍͠ ͔ݕূ͕ඞཁ * ※౰࣌ͷ΋ͷͰ͸ͳ͘ɺswift3ରԠޙʹ΍ͬͨ΋ͷ

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։ൃ߹॓ͷ੒Ռ .m : 317ϑΝΠϧ 50381ߦ → 269ϑΝΠϧ 44688ߦ .h : 324ϑΝΠϧ 10124ߦ → 262ϑΝΠϧ 7818ߦ swift : 3ϑΝΠϧ 199ߦ → 63ϑΝΠϧ 4297ߦ 7999ߦ࡟আɺ4098ߦ௥Ճ

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શମͷ…

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શମͷ…8%!

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൓ল ؆୯ʹ͍͔ͳ͍ͷ͸Θ͔͚ͬͯͨͲɺ͔ͳΓ೉୊ͩ ͱΘ͔ͬͨ ໨ඪ͸ͪΌΜͱཱͯΑ͏

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߹॓ͷΑ͔ͬͨϙΠϯτ SwiftԽͷ͖͔͚ͬʹͳͬͨ શମΛίϯόʔτ͢Δͷʹ͔͔Δ͕࣌ؒͬ͘͟Γ༧ ଌͰ͖ΔΑ͏ʹͳͬͨ جຊσʔλΛѻ͏ΫϥεΛશ෦ม׵Ͱ͖ͨ

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Objective-CͷΫϥεΛ Swift͔ΒݺͿͱ !ࡇΓͰ΍͹͍ * ※౰࣌ͷ΋ͷͰ͸ͳ͘ɺswift3ରԠޙʹ΍ͬͨ΋ͷ

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࣮ߦ࣌ΤϥʔͷԹচͱͳΓ͔Ͷͳ͍ ݺͼग़͢ଆͰ͸ͳ͘ɺݺͼग़͞ΕΔଆ͔ΒSwiftԽ͠ ·͠ΐ͏ ΋͘͠͸Objective-Cଆʹɺnullable, nonnullΛ͚ͭΔ

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Swift 2.3 → Swift 3.0

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͖͔͚ͬ Xcode 8.3 ͔Β Swift 2.3 ͸ରԠ͠ͳ͍ ! ΍͹͍!!

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ͦ΋ͦ΋ͳͥ2.3ͩͬͨͷ? ࢖ͬͨίϯόʔλ͕ Swift2.3͔͠ରԠͯ͠ͳ͔ͬͨ ແྉͱ͍͏᠘ʹҾ͔͔ͬͬͨ

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࢖͏ίϯόʔλʔ͸ͪ͜Β

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΋͏ม׵͸͜Γ͝Γ͓ͩ…>< ·ͨਏ͍࡞ۀ͕࢝·Δ…

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͓΍…Swiftͷ༷ࢠ͕…

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ҙ֎ͱ͏·͍ͬͨ͘Swift3Խ Appleఏڙίϯόʔλʔ͸Ͱ͖Δ͜ ͍͍ͩͨͷΤϥʔ͕ΫϦοΫͰ࣏Δ΍ͭ 10࣌ؒఔ౓Ͱ׬੒ ͨ·ʹҾֻ͚ͬ͋Δ͔Β஫ҙ

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Ҿֻ͚ͬϙΠϯτ উखʹ!΍?͕ͭ͘ͷͰ஫ҙ

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ࠓޙͷϩʔυϚοϓ ݱࡏ Swift 20% དྷظͰ80%Λ໨ࢦ͢ ຖ݄ͷϚΠϧετʔϯΛઃఆ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠

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SwiftԽ͢Δཧ༝

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͑ʁ౰ͨΓલͩΑͶ…? Swift͸ࠓ࠷΋࿩୊ͳݴޠɻObjective-C͸ݹ͍ Ϟμϯͳॻ͖ํ͕Ͱ͖Δɻܕਪ࿦ɺstructɺ OptionalValueͳͲͳͲศརͳػೳ͕ଟ͍ ΤϯδχΞͱͯ͠ͷ੒௕Λߟ͑ΔͱɺSwiftΛ΍ͬͨ ํ͕໌Β͔ʹ͍͍

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ձࣾ͸ೲಘͯ͘͠Εͳ͍ SwiftԽʹԿϲ݄͔͔Δͷʁ ࠓͷίʔυͰԿ͔໰୊͕͋Δͷ͔ʁ SwiftԽͰ՝ۚ཰͸্͕Δͷ͔ʁ Objective-Cͷํ͕ॻ͖׳ΕͯΔͰ͠ΐʁ

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ࣄҊ: ࠾༻ࣦഊ ͍͍ײ͡ͷͰ͖ΔΤϯδχΞM܅͕དྷࣾ ͏ͪͷίʔυͷ಺༁Λઆ໌(swift20%) ʮObj-C͸ॻ͖ͨ͘ͳ͍ΜͰ͢ΑͶʯ ࠾༻Ͱ͖ͣ