FlutterΞϓϦͷ೉ಡԽͱ ΤϥʔϨϙʔτ(iOS) Hiroki Matsue Dec 6th, 2018 Flutter Meetup Tokyo #6 

Hiroki Matsue (@macs_6) 

FlutterͰIIJmio޲͚ʹ ʮΈ͓εΠονʯΛ ϦϦʔε 

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[࣭໰] FlutterͰΞϓϦΛ ϦϦʔε͍ͯ͠Δਓʁ 

[࣭໰] ϦϦʔεલʹ ೉ಡԽͨ͠ਓʁ 

ϦϦʔεؔ࿈ͷυΩϡϝϯτ https://flutter.io/docs/deployment/ios 

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࠷ॳʹॻ͍͚ͯ͋ͬͨͲ ݟམͱͯͨ͠ (AndroidͷProGuardରԠͯͯ͠ؾ͍ͮͨ) 

ͪͳΈʹ 

(ϦϦʔεؔ࿈Ͱ୤ઢ) ΞΠίϯ࡞੒͸"flutterlaunchericons"࢖͏ͱ 1ͭͷը૾͔Β͍͍ײ͡ʹ࡞ͬͯ͘ΕΔ 

iOS͸Dartίʔυ෦෼͕ ೉ಡԽͷର৅ 

΍Δ͜ͱ͸build࣌ʹ ΦϓγϣϯΛ͚ͭΔ͚ͩ (Կނ͔ॳظঢ়ଶͰ͸ରԠ͞Εͯͳ͍ ) https://github.com/flutter/flutter/wiki/Obfuscating-Dart-Code 

/ios/Flutter/Release.xcconfig EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate 

# /packages/flutter_tools/bin/xcode_backend.sh local extra_gen_snapshot_options_or_none="" if [[ -n "$EXTRA_GEN_SNAPSHOT_OPTIONS" ]]; then extra_gen_snapshot_options_or_none="--extra-gen-snapshot-options=$EXTRA_GEN_SNAPSHOT_OPTIONS" fi ... RunCommand "${FLUTTER_ROOT}/bin/flutter" --suppress-analytics \ ${verbose_flag} \ build aot \ --output-dir="${build_dir}/aot" \ --target-platform=ios \ --target="${target_path}" \ --${build_mode} \ --ios-arch="${archs}" \ ${local_engine_flag} \ ${track_widget_creation_flag} \ ${extra_gen_snapshot_options_or_none} 

# /packages/flutter_tools/bin/xcode_backend.sh local extra_gen_snapshot_options_or_none="" if [[ -n "$EXTRA_GEN_SNAPSHOT_OPTIONS" ]]; then extra_gen_snapshot_options_or_none="--extra-gen-snapshot-options=$EXTRA_GEN_SNAPSHOT_OPTIONS" fi ... RunCommand "${FLUTTER_ROOT}/bin/flutter" --suppress-analytics \ ${verbose_flag} \ build aot \ --output-dir="${build_dir}/aot" \ --target-platform=ios \ --target="${target_path}" \ --${build_mode} \ --ios-arch="${archs}" \ ${local_engine_flag} \ ${track_widget_creation_flag} \ ${extra_gen_snapshot_options_or_none} 

xcode_backend.sh ͱ͸ʁ Build PhaseͷRun ScriptͰ࢖ΘΕ͍ͯΔεΫϦϓτ Xcode͔Β΋Dartίʔυ͕build͞ΕΔͷ͸͜Εͷ͓͔͛ 

(୤ઢ2) طଘΞϓϦʹFlutterΛಋೖ͢Δ࣌͸ xcode_backend.sh embed Add2AppϘʔυ্Ͱઈࢍ։ൃத 

͜ΕͰϏϧυ͢Ε͹ ೉ಡԽ׬ྃʂ Χϯλϯʂ 

೉ಡԽͷ֬ೝํ๏ʁ 

App.frameworkΛ֬ೝ͢Δ $ strings build/ios/Release-iphoneos/Runner.app/Frameworks/App.framework/App ... get:_vxa@7048458x get:_aLa@9040228x get:_DLa@7048458x ... 

೉ಡԽͷલޙͰൺֱ before get:_count@7048458 get:_onData@9040228 get:_isSubscribed@7048458 after get:_vxa@7048458x get:_aLa@9040228x get:_DLa@7048458x 

Dartίʔυ͕೉ಡԽ͞Εͨ 

...ϦϦʔεޙͷ͋Δ೔ 

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SentryͷΤϥʔϨϙʔτ΋ ೉ಡԽ͞ΕͯΔ 

೉ಡԽલͷΤϥʔϨϙʔτ 

։ൃத͸ؾ͔ͮͳ͔ͬͨ 

೉ಡԽͷલޙͰൺֱ before main.dart in SampleApp.build at line 48 after SEd in bZ.opa at line 48 

ࣗ෼΋ಡΊͳ͍ 

ϦϦʔεࡁΞϓϦͷ Τϥʔ΋ݟ͍ͨ 

mapϑΝΠϧΛग़ྗ͢Δ ઌ΄ͲͷυΩϡϝϯτʹ͋ͬͨઃఆ EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate mapϑΝΠϧΛग़ྗ͢ΔઃఆΛ௥Ճ EXTRA_GEN_SNAPSHOT_OPTIONS=--obfuscate, ɹ --save-obfuscation-map=ios_dart_symbols_${FLUTTER_BUILD_NUMBER}.json 

ग़ྗ͞ΕͨmapϑΝΠϧ $ cat ios_dart_symbols_5.json ... "_BuildJsonListener","_Gf", "CustomSymbolRenderer","cs", "devicePixelRatio","saa" ... ͜ΕΛࢀর͢Ε͹ಡΊΔ ! 

աڈʹϦϦʔεͨ͠ΞϓϦͷmapϑΝΠϧʁ ࢼͨ͠ͱ͜Ζɺ ੜ੒ݩͷίʔυ͕ಉ͡Ͱ͋Ε͹map΋ಉ͡ʹͳͬͨ 

·ͱΊ 

·ͱΊ • FlutterͩͱiOSͰ΋Dartίʔυͷ೉ಡԽ࡞ۀ͕͋Δ • stringsίϚϯυͰνΣοΫ͢Δͷָ͕ • mapϑΝΠϧ΋ग़ྗ͓ͯ͘͠ͱSentryղಡʹ࢖͑Δ # before main.dart in SampleApp.build at line 48 # after SEd in bZ.opa at line 48 

Έ͓εΠονɺੋඇ͝ར༻͍ͩ͘͞ 

Thanks