Swiftへの愛2018 - Speaker Deck

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Love Swift 2018 @hirothings

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10෼Ͱ࿩͢͜ͱ • Swiftͱ͸ʁ • Swiftͷັྗ • ࠷ۙͷSwift • ͜Ε͔ΒͷSwift • Hello Swift!

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ࣗݾ঺հ • @hirothings (Objective-ͻΖC) • ݩϥʔϝϯ԰ళ௕ • ৭ʑ͋ͬͯݱࡏiOSσϕϩούʔ

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Swiftͱͷग़ձ͍ • ΤϯδχΞͱͯ͠ΩϟϦΞΛελʔτͨ͠2015೥ ౙ..ɻ • ͦΕ·ͰJS, PHPΛগʑ͚ͩͬͨͲઓྗʹͳΒͣɺ Ҋ݅ͷSwiftࢼͯ͠ΈΔ୲౰ʹͳΓSwiftͱग़ձ͏͜ ͱʹ

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Swiftͱ͸ • Apple͕2014೥ʹൃදͨ͠ϓϩάϥϛϯάݴޠ • ͷͪΦʔϓϯιʔεԽ https://github.com/apple/swift • ࣮ߦ଎౓͕଎͍, Ϟμϯ, ҆શ • ΞΠίϯ͸ΞϚπόϝ https://www.apple.com/jp/swift/ ΑΓ

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Swiftͷັྗ • ݫ֨ͳܕγεςϜ • Ϟμϯͳจ๏ • null҆શͳݴޠ • ஋ܕத৺ͷݴޠ • GenericsΛ༻͍ͨॊೈ͞

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ݫ֨ͳܕγεςϜ • ੩తܕ෇͚ݴޠ • ίϯύΠϥ͕ίʔυͷ҆શੑΛ୲อͯ͘͠ΕΔ • ҉໧తͳίʔυ͕গͳ͘ͳΔ • ܕʹରͯ͠ݫࣗ͘͠વͱλΠϓηʔϑͳॻ͖ํ Λ਎ʹ͚ͭΒΕΔ

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Ϟμϯͳจ๏ • ܕਪ࿦ • Ϋϩʔδϟ • ߴ֊ؔ਺ (map, ﬂatMap, ﬁlter, reduce..) • ϓϩτίϧ / ϓϩτίϧ֦ு • δΣωϦΫε • λϓϧ / ෳ਺ͷ໭Γ஋ • ϝϞϦͷࣗಈ؅ཧ(ARC)

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null҆શͳݴޠ null҆શͱ͸: null͕ݪҼͰ࣮ߦ࣌ΤϥʔʹͳΒͳ͍࢓૊Έ OVMM҆શͰͳ͍ݴޠ͸ɺ΋͸΍ϨΨγʔݴޠͩIUUQTRJJUBDPNLPIFSJUFNT FCECBCΑΓ

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null҆શͳݴޠ • nullνΣοΫΛίϯύΠϧ࣌ʹνΣοΫͰ͖Δ • मਖ਼͠ͳ͍ͱͦ΋ͦ΋Ϗϧυ͕௨Βͳ͍

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஋ܕத৺ͷݴޠ ࢀরܕͷ໰୊఺ • ίʔυΛ௥Θͳ͍ͱɺͲ͜·ͰΠϯελϯε͕ ڞ༗͞Ε͍ͯΔͷ͔ෆ໌ +BWBTDSJQUͷ"SSBZ ࢀরܕ ͷྫ

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ඪ४ϥΠϒϥϦͷ΄ͱΜͲ͕ ஋ܕ • String • Array • Dictionary • Bool • Int • Double • Float

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ίϐʔ͝ͱʹίετ͕͔͔Δ ͷͰ͸ʁ

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Copy on Write • ୅ೖ࣌఺Ͱ͸ίϐʔ͕ൃੜ͠ͳ͍ • ஋Λมߋ࣌ɺॳΊͯΠϯελϯε͕࡞ΒΕΔ࢓૊ Έ • ͜ͷ࢓૊Έͷ͓͔͛ͰArrayͳͲͰ΋஋ܕΛ࣮ݱ

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GenericsΛ༻͍ͨॊೈ͞ • 2ͭͷҾ਺Λswap͢Δؔ਺ • IntܕͷҾ਺ͷΈαϙʔτ • ৼΔ෣͍͸ಉ͕ͩ͡ɺ͋ΒΏΔܕΛαϙʔτͨ͠ ͍..

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• GenericsͰղܾ • ܕύϥϝʔλ • ؔ਺, δΣωϦοΫܕ(Class, Struct)ɺ͋ΒΏΔ৔ ໘Ͱ࢖͑Δ IUUQTEPDTTXJGUPSHTXJGUCPPL-BOHVBHF(VJEF(FOFSJDTIUNM

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࠷ۙͷSwift • όʔδϣϯΞοϓ͕ΊΜͲ͏ʁ • Φʔϓϯιʔεͱͯ͠ͷػೳڧԽ

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• Swift2 to 3ͷΑ͏ͳ஍ࠈ͸ͳ͍ • Swift3ͰObj-CʹҾͬுΒΕͨ࢓༷ΛόοαϦ੾ͬͯ҆ఆ͖ͯͨ͠ • Swift4.1 to 4.2ͷMigration͸਺࣌ؒͰऴΘͬͨɻ • XcodeͷMigrationػೳ + ͪΐͬͱͨ͠मਖ਼ͰDone • Ξοϓσʔτͷ஗͍ϥΠϒϥϦ͸Swift3ͰίϯύΠϧ όʔδϣϯΞοϓ͕ΊΜͲ͏ʁ

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• จࣈྻͷڧԽ • StringͷCollection TypeԽ • ෳ਺ߦจࣈྻϦςϥϧͷαϙʔτ • Randomؔ਺ͷ࣮૷ • ࠓ·ͰCͷؔ਺arc4random_uniform Λ࢖͍͕ͬͯͨɺLinux؀ڥͰ αϙʔτ͞Εͯͳ͍ͨΊ໘౗ͩͬͨ • Dynamic Member Lookup Φʔϓϯιʔεͱͯ͠ͷػೳڧԽ

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͜Ε͔ΒͷSwift • ABI҆ఆԽ • async / await

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ABI҆ఆԽ • (ͣͬͱ༏ઌ՝୊͚ͩͲ)Swift5ͷϦϦʔεཁ݅ • ෳ਺ͷSwiftόʔδϣϯͷڞଘ • Ҡߦͷπϥϛ΋ݮΔ • ϥΠϒϥϦ੍࡞ऀ΋خ͍͠ • ݱࡏϞδϡʔϧ୯ҐͰSwift3 or 4Λࢦఆͯࠞ͠ࡏͤ͞ Δ͜ͱ͸Մೳ

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async / await • ඇಉظॲཧΛಉظॲཧతʹॻ͚Δ • ࠓ·ͰRxSwiftͳͲؔ਺ܕϓϩάϥϛϯάͷΞϓϩʔν ΛಋೖͤͶ͹ͳΒͣ؆୯Ͱ͸ͳ͔ͬͨ • ࣮૷࣌ظ͸·ͩະ֬ఆ • KotlinͰ͸͢ͰʹίϧʔνϯಋೖࡁΈ • SwiftͷੜΈͷ਌ΫϦεϥτφʔ͕proposalग़ͨ͠

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Before async / await

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After (Proposalͷྫ) async / await

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Hello! Swift

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Swift Playgrounds • iPadͰήʔϜײ֮ͰSwiftΛ৮ΕΔެࣜΞϓϦ IUUQTXXXBQQMFDPNKQTXJGUQMBZHSPVOET

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Playground • ϦΞϧλΠϜͰ࣮ߦ͞ΕΔΤσΟλ • ཁXcode

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Server Side Swift • UIKitʹڵຯͳ͍ํʹΦεεϝ • Ϗϧυ଎͍͠ɺ؆୯ͳAPIͳΒϗεςΟϯά·Ͱ Ͱ͖ΔϑϨʔϜϫʔΫ΋(ݸਓΞϓϦͷAPI͸SSSͰ࣮૷ͯ͠·͢)