!ZPJDIJUHZ ϞόΠϧΞϓϦͰࠔΒͳ͍ ΤϥʔϋϯυϦϯάͱ ϩΪϯάͷϕετϓϥΫςΟε ଟլ୩ ༸Ұ iOSDC JAPAN 2017 

!ZPJDIJUHZ ࣗݾ঺հ ʙ ଟլ୩ ༸Ұ • Swinject (Dependency Injection Framework) ͷ࡞ऀ ‣ ଟ਺ͷϓϩμΫγϣϯ࠾༻ ‣ GitHubελʔ਺: ΋͏͙͢2000 • ϝϧΧϦͷiOSΤϯδχΞ ‣ ओʹΞϝϦΧ൛ΞϓϦΛ୲౰ ‣ 9/30 (౔) Mercari Tech Conf 2017ͰDIͷ࿩Λ͠·͢ 
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!ZPJDIJUHZ •ɹΤϯδχΞͷεΩϧ •ɹίʔυϨϏϡʔ •ɹϢχοτςετ •ɹ6*ࣗಈςετ •ɹखಈςετ •ɹΤϥʔϩά ࠓ೔ͷ࿩ ΞϓϦͷ඼࣭޲্ʹඞཁͳ͜ͱ 

!ZPJDIJUHZ ͜Μͳͷݟͨ͜ͱ͋Γ·ͤΜ͔ʁ ΫϥογϡͰ1ˑϨϏϡʔͷཛྷ ࠶ݱ͠ͳ͍ Ͳ͏͢Ε͹͍͍͔෼͔Βͳ͍ ΞϓϦΛόʔδϣϯΞοϓͨ͠ 

!ZPJDIJUHZ Ϋϥογϡϩάͱ͍͑͹ 

!ZPJDIJUHZ Crashlytics 
IUUQTXXXGBCSJDJP $SBTIMZUJDTΛਂ͘୳ͬͯΈΑ͏


!ZPJDIJUHZ CrashlyticsͰҰ൪ॏཁͳ͜ͱ 
IUUQTEPDTGBCSJDJPBQQMFDSBTIMZUJDTUFTUDSBTIIUNMUSPVCMFTIPPUJOH func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]? ) -> Bool { Fabric.with([Crashlytics.self]) return true } ϩά͸ΫϥογϡޙʹΞϓϦ͕࠶ىಈͨ࣌͠ʹૹΒΕΔ application:didFinishLaunchingWithOptionsΛແࣄʹ௨ա͠ͳ͍ͱμϝ 

!ZPJDIJUHZ ىಈ࣌ application:didFinishLaunchingWithOptionsͰͦ͠͏ͳ͜ͱ • ֤छϑϨʔϜϫʔΫͷॳظԽ •ɹ%BUBCBTFͷϚΠάϨʔγϣϯ •ɹΩϟογϡͷΫϦΞ ϝΠϯεϨουΛ௕࣌ؒࢭΊͳ͍ 

!ZPJDIJUHZ ಛʹґଘϥΠϒϥϦʹ஫ҙ 

IUUQTHJUIVCDPNQJOUFSFTU1*/3FNPUF*NBHFJTTVFT

1*/3FNPUF*NBHFࣗମ͸͍͍ϥΠϒϥϦͰ͢ 

!ZPJDIJUHZ ͦΕͰ 

!ZPJDIJUHZ Crashlyticsͬͯ Πϯετʔϧ͢ΔҎ֎ʹ Կ͔ඞཁͳͷʁ 

!ZPJDIJUHZ Crashlyticsʹ͸ ศརͳ෇Ճ৘ใ͕͋Δ 

!ZPJDIJUHZ Ϣʔβ৘ใͷ௥Ճ γϯάϧτϯϝιου આ໌ TFU6TFS*EFOUJpFS @ 
6TFS*EΛઃఆ͢Δ TFU6TFS&NBJM @ 
&NBJMΛઃఆ͢Δ

6TFS*E͕͋Ε͹ී௨͸ෆཁ TFU6TFS/BNF @ 
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6TFS*E͕͋Ε͹ී௨͸ෆཁ  ΧελϚʔαϙʔτͷ৘ใ͔Βௐ΂Δ࣌ʹศར
 &NBJMͱϢʔβͷ໊લ͸໌Β͔ͳݸਓ৘ใͳͷͰ஫ҙ 

!ZPJDIJUHZ Key/Valueͷ௥Ճ γϯάϧτϯϝιου આ໌ TFU0CKFDU7BMVF @GPS,FZ 4USJOHͳͲΛ,FZʹରͯ͠ઃఆ͢Δ TFU#PPM7BMVF @GPS,FZ #PPM஋Λ,FZʹରͯ͠ઃఆ͢Δ TFU*OU7BMVF @GPS,FZ *OU஋Λ,FZʹରͯ͠ઃఆ͢Δ TFU'MPBU7BMVF @GPS,FZ 'MPBU஋Λ,FZʹରͯ͠ઃఆ͢Δ  3FNPUF$POpH
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!ZPJDIJUHZ ΧελϜϩάͷ௥Ճ ؔ਺ આ໌ $-4-PHW @
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!ZPJDIJUHZ CrashlyticsΛ OSLogͱ૊Έ߹Θͤͯ ࣗ࡞ͷϩΨʔΛ࡞Γ·͢ 

!ZPJDIJUHZ OSLog/os_log var osLog = OSLog( subsystem: “com.my-company.LoggingSample", category: “ViewModel” ) os_log(“Hello world!”, log: osLog, type: .default) 
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!ZPJDIJUHZ OSLogType 
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 ͍ͬͺ͍ʹͳͬͨΒετϨʔδʹҠ͞ΕΔ FSSPS ετϨʔδ  ϓϩηε಺ͷΤϥʔͰ࢖͏ GBVMU ετϨʔδ  ෳ਺ϓϩηε͕ؔΘΔΤϥʔͰ࢖͏ 

!ZPJDIJUHZ Console App  IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED
 IUUQTNFEJVNDPN!BCKVSBUPVOJpFEMPHHJOHBOEBDUJWJUZUSBDJOHBB⒎FGC • "DUJWJUZ
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!ZPJDIJUHZ ͔͠͠ͳ͕Β ࠓճ͸γϯϓϧͳ࢖༻๏ʹཹΊ·͢ # $SBTIMZUJDT͚ͩͰे෼ڧྗ 

!ZPJDIJUHZ ࣗ࡞ϩΨʔͷϩάϨϕϧ ϩάϨϕϧ ༻్ ॲཧ EFCVH %FCVH࣌ʹ͚ͩ
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!ZPJDIJUHZ LogΫϥε final class Log { static func debug(message: String) { os_log("⚒%@", type: .debug, message) } static func info(message: String) { os_log("ℹ%@", type: .debug, message) CLSLogv("%@", getVaList([message])) } static func error(message: String) { os_log("❗%@", type: .debug, message) CLSLogv("[Error] %@", getVaList([message])) } } 

!ZPJDIJUHZ LogΫϥε final class Log { static func fatal( message: String, file: String = #file, function: String = #function, line: Int = #line) { os_log("%@", log: .default, type: .debug, message) let fileName = file.components(separatedBy: "/").last ?? "" let error = NSError( domain: "\(fileName):\(function)", code: line, userInfo: ["message": message] ) Crashlytics.sharedInstance().recordError(error) assertionFailure(message) } } 

!ZPJDIJUHZ final class Log { static func error(error: Error) { let message = String(reflecting: error) os_log("❗%@", log: .default, type: .debug, message) CLSLogv("[Error] %@", getVaList([message])) } static func fatal(error: Error) { let message = String(reflecting: error) os_log("%@", log: .default, type: .debug, message) Crashlytics.sharedInstance() .recordError(error as NSError) assertionFailure(message) } } LogΫϥε 

!ZPJDIJUHZ Demo  -PHTXJGU
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IUUQTHJTUHJUIVCDPNZPJDIJUHZFEBGBCGFCFBCDF
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IUUQTHJTUHJUIVCDPNZPJDIJUHZFCBFGEECBBD 

!ZPJDIJUHZ Demoͨ͜͠ͱ 

!ZPJDIJUHZ Demoͨ͜͠ͱ 

!ZPJDIJUHZ guard let something = something else { // Swallow return } guard !array.isEmpty else { // Swallow return } guard let something = something else { Log.fatal(message: "something is nil unexpectedly.") return } guard !array.isEmpty else { Log.fatal(message: "array is empty.") return } ࠷ޙʹ ෆਖ਼ͳঢ়ଶΛҿΈࠐΜͰ͍ͨΒ࠷ѱͰ΋ϩάΛૹ͓ͬͯ͜͏
ݱࡏͷ࣮૷Ͱ͸͋Γ͑ͳͯ͘΋কདྷͷόάΛݕ஌͢ΔͨΊ 

!ZPJDIJUHZ %BUF 4QFBLFS 5JUMF  !UFOOUFOO (PʹΑΔJ04ΞϓϦͷ։ൃ  !DIVHBO[Z ϝϧΧϦͰ࣮ࢪͨ͠աڈ࠷େن໛ͷ"#ςετʮυϩϫʔ
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'JSFCBTFΛ׆༻ͨ͠αʔόϨεJ04ΞϓϦέʔγϣϯ։ൃ  !EUWE ϝϧΧϦΞοςΛࢧ͑ΔΦʔτϚτϯ  !KPMMZKPFTUFS པΉ͔Βϓογϡ௨஌ͷ࢖͍ํΛ͓Ζ͔ͦʹ͠ͳ͍Ͱ͘Εʂ
ʙϓογϡ௨஌ͷදݱɺྺ࢙ɺ࠷৽ಈ޲·Ͱʙ Thank you .PSF
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