ɹ2017/02/08 Kyobashi.swift x AKIBA.swift ߹ಉษڧձ Migrating to Swift 3

About Me

• ాத ޹໌ (Takaaki Tanaka) • Ϋϥεϝιουגࣜձࣾ • iOS ΞϓϦέʔγϣϯΤϯδχΞ • @kongmingtrap • iOS Developer (Swift / Objective-C) • GyazSquare / GitHub

ͱ͋ΔΞϓϦͷ Swift 3ରԠ

ͱ͋ΔΞϓϦ • Swift 1.1ͷࠒ͔Β࡞ΒΕ͍ͯΔΞϓϦ • ॳظόʔδϣϯ͸iOS 7ରԠ • Swift 1.2 → 2.1ʹରԠ • ιʔείʔυɹ໿250ϑΝΠϧ • ϥΠϒϥϦ؅ཧ͸CocoaPods

ϛογϣϯ iOS 10 ʹ ରԠηϤ

iOS 10 • Xcode ͷόʔδϣϯ͸8Ҏ্ • iOS SDK 10Λ૊ΈࠐΉͨΊʹ͸ Swift 2.3ɺ Swift 3.0ରԠ͕ඞཁ

Swift 3.0 • NS Prefix͔Βͷ୤٫ • ৽ͨͳΔAPIσβΠϯΨΠυϥΠϯ

Swift 3.0 • NS Prefix͔Βͷ୤٫ → Ұ෦࢒Γ·ͨ͠ ʢNSNumberʣ • ৽ͨͳΔAPIσβΠϯΨΠυϥΠϯ → طଘ ͷϥΠϒϥϦͷϝιου໊มΘΓ͗͢ • ABI҆ఆԽ → Swift 4·Ͱ଴ͬͯͶ

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ʊਓਓਓਓਓਓਓਓਓʊ ʼɹࢼ͞ΕΔ஧੣৺ɹʻ ʉ:?:?:?:?:?:?:?:ʉ

Swift 2.3 • Xcode 8 + iOS 10 SDKͰϏϧυ͕Մೳ • Swift 2.x ܥͷAPIσβΠϯ • ͱΓ͋͑ͣٸ͍ͰiOS 10ͰϏϧυ͠ͳ͚Ε ͹ͳΒͳ͍࣌ʹରԠ

Swift 2.3 9DPEF3FMFBTF/PUFT • Xcode 8.2 ͕࠷ޙͷαϙʔτʹͳΔͨΊɺ Swift 3.0΁ͷରԠ͸ඞਢ

Swift 3.0΁Ҡߦ

Swift 2.2΁ͷҠߦ • Xcode 7.2 + Swift 2.1 ͷ։ൃ؀ڥΛXcode 8.2 Ͱىಈͨ͠ࡍɺʮEdit > Convert > To Current Swift Syntax.ʯͷର৅ʹTarget͕දࣔ ͞Εͳ͔ͬͨ • ͱΓ͋͑ͣɺXcode 7.3ͰSwift 2.1͔ΒSwift 2.2΁Ҡߦͨ͠

Migration • Xcode 8.2Ͱىಈͨ͠ࡍɺաڈͷSwift όʔ δϣϯͷ৔߹͸Convertը໘͕ىಈ͢Δ • ʮEdit > Convert > To Current Swift Syntax.ʯ Ͱ΋࣮ߦՄೳ • Swift 1.1 → Swift 2.1ͷ࣌͸࢖͍ͷʹͳΒͳ ͔ͬͨ

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ʊਓਓਓਓਓਓਓਓਓʊ ʼɹ$POWFSU'BJMFEɹʻ ʉ:?:?:?:?:?:?:?:?:?ʉ

Migration • Xcode 8.2Ͱىಈͨ͠ࡍɺաڈͷSwift όʔδϣ ϯͷ৔߹͸Convertը໘͕ىಈ͢Δ • ʮEdit > Convert > To Current Swift Syntax.ʯͰ ΋࣮ߦՄೳ • Swift 1.1 → Swift 2.1ͷ࣌͸࢖͍΋ͷʹͳΒͳ ͔ͬͨ • Swift 2.2 → Swift 3.0ͷ࣌΋࢖͍΋ͷʹͳΒͳ ͔ͬͨ ← New!

ͦΕͰ΋ແ͍ΑΓ͸Ϛγ • UIKitͷmethodͷม׵ • Enumͷupper case → lower caseม׵ • NSPrefixͷϥΠϒϥϦͷม׵

ͻͨ͢Β஍ಓͳ࡞ۀ • CurryԽͨ͠ϝιουͷमਖ਼ public static func log(level level: Level)(@autoclosure name: () -> String) (@autoclosure message: () -> String) -> String { if level.rawValue <= Logger.currentLevel.rawValue { let full = "\(level.description): \(name()) - \(message())" print(full) return full } return "" }

ͻͨ͢Β஍ಓͳ࡞ۀ • CurryԽͨ͠ϝιουͷमਖ਼ public static func log(level: Level) -> ((@escaping () -> String) -> ((@escaping () -> String) -> String)) { return { (name: @escaping (() -> String)) in return { (message: @escaping (() -> String)) in if level.rawValue <= Logger.currentLevel.rawValue { let full = "\(level.description): \(name())) - \(message())" print(full) return full } return "" } } }

ͻͨ͢Β஍ಓͳ࡞ۀ • closureʹ@escapingͷ௥Ճ

ͻͨ͢Β஍ಓͳ࡞ۀ • Ҡߦπʔϧ͕ม׵ͨ͠Օॴͷमਖ਼ Date as NSDate as Date String as NSString as String

ͻͨ͢Β஍ಓͳ࡞ۀ • Testͷमਖ਼

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Recap

w Ͱ͖Ε͹ೋ౓ͱ΍Γͨ͘ͳ͍ w ίϯϑϦΫτղফͷͨΊɺݽಠͳ࡞ۀ ͱͳΔ w ஧੣৺Λࢼ͞ΕΔ Recap

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͋Γ͕ͱ͏͍͟͝·ͨ͠