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ͤΊͯɺωΠςΟϒΒ͘͠
ϚϧνϓϥοτϑΥʔϜͱఫୀઓུ
2025.11.01 Kotlin Fest 2025
RyuNen344
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About Me
• Bunjiro Miyoshi (id: RyuNen344)
• Kodee͘Μͷ͵͍͙ΔΈ3ͭɺΩʔϗϧμʔ4ͭ
• Kodee͘Μݟ͔͚ͨΒͥͻ #KodeeEverywhere ͷϋογϡλάΛ͚ͭͯᄁ͖Λʂ
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About Me
• KMPͱͷग़ձ͍DroidKaigi 2020ͷΞϓϦ
• KMPΛ࢝Ίͱ͢ΔϚϧνϓϥοτϑΥʔϜΛͬͨΞϓϦΛ2021
͔ΒϓϩμΫγϣϯͰӡ༻
• डୗ ~ ࣗࣾαʔϏεͰͷ։ൃܦݧ͋Γ
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⚠ Caution ⚠
• Kotlin/NativeϦεΫϔοδ͕ޮ͘બࢶͰ͍͍ͧɺͱ͍͏Λ͠·͢
• ٕͨͩ͠ज़બఆʹۜͷؙͳ͍
• ࣄۀϑΣʔζɺνʔϜମ੍ɺशख़ͳͲ༷ʑͳมΛߟྀܾͯ͠ఆ͖͢
• Kotlin/NativeҎ֎ͷબࢶΛ൱ఆ͢Δҙਤͳ͍
• KMPCMPΛಋೖݕ౼͢ΔࡍʹɺͲΕ͙Β͍Kotlin/Native͕ϦεΫϔο
δʹཱ͔ͭͱ͍͏؍ͰࢀߟʹͳΕϋοϐʔ
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ʮωΠςΟϒΒ͠͞ʯͱʮఫୀઓʯ
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ωΠςΟϒΒ͠͞
• Platform APIΛݺͼग़͍ͯ͠Δ͜ͱͰͳ͍
• ͲͷϚϧνϓϥοτϑΥʔϜٕज़࠷ऴతʹOSͷAPIΛݺͿ
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ωΠςΟϒΒ͠͞
Scrolling, Animation, FHD/60FPS
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Text, Emoji, Shapes
ωΠςΟϒΒ͠͞
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Navigation, Drag, swipe, and
fl
ing
Back button, Pinch in/out
ωΠςΟϒΒ͠͞
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ωΠςΟϒΒ͠͞ͷۙಓ
Platform API
ΛϒϦοδͳ͠Ͱར༻͢Δ
Platform API͔Βԕ͔͟Εԕ͔͟Δ΄Ͳɺ
ʮωΠςΟϒΒ͠͞ʯΛग़͢ϋʔυϧ্͕͕Δ
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ఫୀઓ
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ఫୀઓ͍͠
• αϯΫίετͷढറ
• ࠷దղͷมԽ
• ֶशίετɾ։ൃίετͷ৺ཧతϋʔυϧ
• ݱঢ়ҡ࣋όΠΞε
• අ༻ରޮՌͷஅ
• ݱঢ়ѲͷΈ
ϑϧϦϓϨΠεك
ݱ࣮తʹஈ֊తͳఫୀઓͷ܁Γฦ͠
• ΰʔϧઃఆͷ͠͞
• ৽چٕज़ڞଘʹΑΔೝෛՙ
• ϝϯςφϯείετ૿Ճ
• Ϧιʔεͷࢄ
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ϚϧνϓϥοτϑΥʔϜɺͳͥ
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ϚϧνϓϥοτϑΥʔϜͷఫୀઓ
• InterfaceΛҙࣝͨ͠ϙΠϯτΛ͑Δඞཁ͋Γ
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Compose Multiplatform for
iOS Is Stable🎉
2025.08 1.8.0
Kotlin Multiplatform/Compose Multiplatform
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Compose Multiplatform for iOS
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Kotlin Multiplatform Mobile -> KMP Plugin
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Swift on Android Studio
• SwiftपΓͷIDEαϙʔτ
͕ڧԽ
• Swift Package Manager
ͷೝࣝ
• ίʔυδϟϯϓ/ิɺ
OKʢ3rd partyෆՄʣ
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KMP × Xcode
Extensionͳ͠ͰKotlinଆͷϏϧυɺϥϯλΠϜΤϥʔΛXcodeͰදࣔͰ͖Δ
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SkikoҒେ͚ͩͲ...
• Compose MultiplatformPlatform APIΛݺͼग़͍ͯ͠ͳ͍...͕
• Kotlin/NativeͰ͋ΕҎԼͷ͜ͱΛແʹ͜ͳͤΔʢͪΖΜϋʔυ
ϧ͋Δʣ
• Platform APIͷݺͼग़͠
• ہॴతͳద༻
• 3rd party libraryͷऔΓࠐΈ
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Kotlin/Native Power💪
• Case1. Platform API - NSURLSession
• Case2. UI - MapKit
• Case3. Interop - Alamo
fi
re
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Case.1 Platform API: NSURLSession
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Case.1 Platform API: NSURLSession
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Case.2 UI: MapKit
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Case.2 UI: MapKit
• SwiftʹΑΔ
ViewControllerͷ࣮
• MKMapViewͷอ࣋
• viewDidLoadͰදࣔ
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Case.2 UI: MapKit
• KotlinʹΑΔViewController
ͷ࣮
• ͳΜ͔ͩ༨ܭͳ͕ؔଟ͍
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Case.2 UI: MapKit
• MKMapViewͷอ࣋
• viewDidLoadͰදࣔ
• SwiftͱॲཧͷྲྀΕಉ͡
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Case.2 UI: MapKit
K/NͰ࣮ͨ͠Obj-CͷαϒΫϥεΛExportͰ͖ͳ͍
https://kotlinlang.org/docs/native-objc-interop.html#unsupported
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Case.2 UI: MapKit
@OverrideInitΛ༩ͨ͠ݩͷΠχγϟϥΠβͱҰக͢ΔίϯετϥΫλʔ͕ඞཁ
https://kotlinlang.org/docs/native-objc-interop.html#subclassing-swift-objective-c-classes-and-protocols-from-kotlin
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Case.2 UI: MapKit
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Case.2 UI: MapKit
K/NͰϙΠϯλΛ͏࣮͕Α͘ొ͢Δ
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Case.3 Interop: Alamo
fi
re
• Alamo
fi
re/Alamo
fi
re
• NSURLSessionΛϥοϓ͢ΔSwift
͚ͷϥΠϒϥϦ
• androidͰ͍͏ͱ͜ΖͷOkHttp
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Case.3 Interop: Alamo
fi
re
• >For example, you can use CocoaPods integration or set up a cinterops
con
fi
guration.
• https://kotlinlang.org/docs/native-c-interop-stability.html#third-party-
libraries
• CocoaPodsRead-OnlyʹͳΔ͜ͱ͕Ξφϯε͞Ε͍ͯΔͨΊSPMΛ༻͢Δ
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Case.3 Interop: Alamo
fi
re
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Case.3 Interop: Alamo
fi
re
• Package.swift௨ৗͷͷͱ΄΅
มΘΒͳ͍
• XCFrameworkΛॻ͖ग़ͨ͢Ίʹ
BlankͰΑ͍ͷͰproductͱ
targetΛઃఆ͢Δඞཁ͋Γ
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Case.3 Interop: Alamo
fi
re
• `src/nativeInterop/cinteropʹ.def`Λஔ͢Δ
• https://kotlinlang.org/docs/native-de
fi
nition-
fi
le.html
• build.gradleͰcinteropઃఆΛߦ͍ɺcompiler opt, linker optΛઃఆ͢
Δ
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Case.3 Interop: Alamo
fi
re
• defϑΝΠϧʹObj-CͷίʔυΛهࡌ͢Δ͜ͱՄೳ
• @see touchlab/CrashKiOS
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Case.3 Interop: Alamo
fi
re
• XCFrameworkʹؚ·ΕΔϔομʔ
ͷύε࣮ػ/γϛϡϨʔλʔ, CPU
ͷΞʔΩςΫνϟʹΑͬͯҟͳΔͷ
ͰKonanTargetʹΑͬͯذͤ͞Δ
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Case.3 Interop: Alamo
fi
re
• Alamo
fi
reͷAF͕ݟ͔ͭΒͳ͍
• Swift͚ϥΠϒϥϦͷଟ͘Obj-C༻ϔομʔΛఏڙ͍ͯ͠ͳ͍
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Case.3 Interop: Alamo
fi
re
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Case.3 Interop: Alamo
fi
re
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Kotlin/NativeɺͲ͏ʁ
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Kotlin/NativeۜͷؙͰͳ͍
1. Swift FrameworkΛݺͼग़ͤͳ͍
• औΓࠐΉʹϥούʔ࣮Λߦ͍, ObjC HeaderΛੜ͢Δඞཁ͕͋Δ
• ϥούʔ࣮ͷେ෯ʹԼ͕͍ͬͯΔ͕ख͔͔ؒΔ
• APIΛݺΔͱ͍͏ڧΈ͕ബΕΔ
2. ObjCͷͳ͍/ඇਪͱ֦ͯ͠ு͞Εͳ͘ͳͬͨPlatform API/Framework͕͋Δ
3. Kotlin/Nativeͷػೳ੍ݶ
• Obj-CͷαϒΫϥεΛExportͰ͖ͳ͍ͳͲݴޠػೳతͳ੍
• Τϥʔͷ͕ࡶ
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Case.? KMP/CMPΛΊΔͱ͖
• ஔ͖͑࣌ͷ্͕͕Βͳ͍Α͏ʹదʹinterfaceΛ͓۠ͬͯ͘
• androidଆͷ࣮ͦͷ··ࢿ࢈ʹͳΔͷͰOK
• Swift͕৮͍ͬͯΔՕॴ͔Βஔ͖͑Δ
• ࣮͕៉ྷʹ۠Εͳ͍ͱ͖যΒͳ͍
• K/NͰ͓ΛͤΔ͔ݕ౼͢Δ
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Key Takeaways
• ྖҬΛҙٕࣝͨ͠ज़બఆɾઃܭɾ࣮
• ఫୀΛલఏͱ͢Δͱࣗͣͱݟ͑ͯ͘Δ
• Kotlin/Native݁ߏແ͕Ͱ͖Δ
• InterfaceͱImplementationΛ্खʹ۠Εͳ͍߹ͷϦεΫϔοδ
ͱͰ͖Δ
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EOF