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Love Swift 2018 @hirothings
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10Ͱ͢͜ͱ • Swiftͱʁ • Swiftͷັྗ • ࠷ۙͷSwift • ͜Ε͔ΒͷSwift • Hello Swift!
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ࣗݾհ • @hirothings (Objective-ͻΖC) • ݩϥʔϝϯళ • ৭ʑ͋ͬͯݱࡏiOSσϕϩούʔ
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Swiftͱͷग़ձ͍ • ΤϯδχΞͱͯ͠ΩϟϦΞΛελʔτͨ͠2015 ౙ..ɻ • ͦΕ·ͰJS, PHPΛগʑ͚ͩͬͨͲઓྗʹͳΒͣɺ Ҋ݅ͷSwiftࢼͯ͠ΈΔ୲ʹͳΓSwiftͱग़ձ͏͜ ͱʹ
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Swiftͱ • Apple͕2014ʹൃදͨ͠ϓϩάϥϛϯάݴޠ • ͷͪΦʔϓϯιʔεԽ https://github.com/apple/swift • ࣮ߦ͕͍, Ϟμϯ, ҆શ • ΞΠίϯΞϚπόϝ https://www.apple.com/jp/swift/ ΑΓ
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Swiftͷັྗ • ݫ֨ͳܕγεςϜ • Ϟμϯͳจ๏ • null҆શͳݴޠ • ܕத৺ͷݴޠ • GenericsΛ༻͍ͨॊೈ͞
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ݫ֨ͳܕγεςϜ • ੩తܕ͚ݴޠ • ίϯύΠϥ͕ίʔυͷ҆શੑΛ୲อͯ͘͠ΕΔ • ҉తͳίʔυ͕গͳ͘ͳΔ • ܕʹରͯ͠ݫࣗ͘͠વͱλΠϓηʔϑͳॻ͖ํ Λʹ͚ͭΒΕΔ
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Ϟμϯͳจ๏ • ܕਪ • Ϋϩʔδϟ • ߴ֊ؔ (map, flatMap, filter, reduce..) • ϓϩτίϧ / ϓϩτίϧ֦ு • δΣωϦΫε • λϓϧ / ෳͷΓ • ϝϞϦͷࣗಈཧ(ARC)
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null҆શͳݴޠ null҆શͱ: null͕ݪҼͰ࣮ߦ࣌ΤϥʔʹͳΒͳ͍Έ OVMM҆શͰͳ͍ݴޠɺϨΨγʔݴޠͩIUUQTRJJUBDPNLPIFSJUFNT FCECBCΑΓ
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null҆શͳݴޠ • nullνΣοΫΛίϯύΠϧ࣌ʹνΣοΫͰ͖Δ • मਖ਼͠ͳ͍ͱͦͦϏϧυ͕௨Βͳ͍
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ܕத৺ͷݴޠ ࢀরܕͷ • ίʔυΛΘͳ͍ͱɺͲ͜·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 ͷͰʁ
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Copy on Write • ೖ࣌Ͱίϐʔ͕ൃੜ͠ͳ͍ • Λมߋ࣌ɺॳΊͯΠϯελϯε͕࡞ΒΕΔ Έ • ͜ͷΈͷ͓͔͛ͰArrayͳͲͰܕΛ࣮ݱ
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GenericsΛ༻͍ͨॊೈ͞ • 2ͭͷҾΛswap͢Δؔ • IntܕͷҾͷΈαϙʔτ • ৼΔ͍ಉ͕ͩ͡ɺ͋ΒΏΔܕΛαϙʔτͨ͠ ͍..
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• GenericsͰղܾ • ܕύϥϝʔλ • ؔ, δΣωϦοΫܕ(Class, Struct)ɺ͋ΒΏΔ ໘Ͱ͑Δ IUUQTEPDTTXJGUPSHTXJGUCPPL-BOHVBHF(VJEF(FOFSJDTIUNM
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࠷ۙͷSwift • όʔδϣϯΞοϓ͕ΊΜͲ͏ʁ • Φʔϓϯιʔεͱͯ͠ͷػೳڧԽ
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• Swift2 to 3ͷΑ͏ͳࠈͳ͍ • Swift3ͰObj-CʹҾͬுΒΕ༷ͨΛόοαϦͬͯ҆ఆ͖ͯͨ͠ • Swift4.1 to 4.2ͷMigration࣌ؒͰऴΘͬͨɻ • XcodeͷMigrationػೳ + ͪΐͬͱͨ͠मਖ਼ͰDone • Ξοϓσʔτͷ͍ϥΠϒϥϦSwift3ͰίϯύΠϧ όʔδϣϯΞοϓ͕ΊΜͲ͏ʁ
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• จࣈྻͷڧԽ • StringͷCollection TypeԽ • ෳߦจࣈྻϦςϥϧͷαϙʔτ • Randomؔͷ࣮ • ࠓ·ͰCͷؔarc4random_uniform Λ͍͕ͬͯͨɺLinuxڥͰ αϙʔτ͞Εͯͳ͍ͨΊ໘ͩͬͨ • Dynamic Member Lookup Φʔϓϯιʔεͱͯ͠ͷػೳڧԽ
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͜Ε͔ΒͷSwift • ABI҆ఆԽ • async / await
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ABI҆ఆԽ • (ͣͬͱ༏ઌ՝͚ͩͲ)Swift5ͷϦϦʔεཁ݅ • ෳͷSwiftόʔδϣϯͷڞଘ • ҠߦͷπϥϛݮΔ • ϥΠϒϥϦ੍࡞ऀخ͍͠ • ݱࡏϞδϡʔϧ୯ҐͰSwift3 or 4Λࢦఆͯࠞ͠ࡏͤ͞ Δ͜ͱՄೳ
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async / await • ඇಉظॲཧΛಉظॲཧతʹॻ͚Δ • ࠓ·ͰRxSwiftͳͲؔܕϓϩάϥϛϯάͷΞϓϩʔν ΛಋೖͤͶͳΒͣ؆୯Ͱͳ͔ͬͨ • ࣮࣌ظ·ͩະ֬ఆ • KotlinͰ͢ͰʹίϧʔνϯಋೖࡁΈ • SwiftͷੜΈͷΫϦεϥτφʔ͕proposalग़ͨ͠
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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 • Ϗϧυ͍͠ɺ؆୯ͳAPIͳΒϗεςΟϯά·Ͱ Ͱ͖ΔϑϨʔϜϫʔΫ(ݸਓΞϓϦͷAPISSSͰ࣮ͯ͠·͢)
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One more things..
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࠷ۙͷXcodeʹ͍ͭͯ
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ෳγϛϡϨʔλΛͬͨฒྻςετ
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Diffʹ৭͕ͭ͘Α͏ʹͳͬͨ!!
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Xcode10Ͱ͍ͭʹϚϧνΧʔιϧରԠ!!
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Fin