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KMP の Swift export
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Koki Hirokawa
October 02, 2025
Technology
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KMP の Swift export
extension DC 2025 Day2 @Sansan
※ 2025/10/2 現在、Swift export のステータスは experimental です
Koki Hirokawa
October 02, 2025
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Transcript
KMP ͷ Swift export 2025/10/2 extension DC 2025 Day2 @Sansan
Koki Hirokawa
@pihero13 KokiHirokawa Sony Honda Mobility Inc. 1
Swift export ͱ Experimental Objective-C Λհͣ͞ʹ Swift ͔Β Kotlin Ͱॻ͔ΕͨॲཧΛݺͼग़ͨ͢Ίͷٕज़
2
ΞδΣϯμ KMP ͱ Objective-C export ͱ Swift export ͱ Objective-C
export ͱ Swift export ͷҧ͍ ·ͱΊ 3
KMP ͱ
KMP - ֓ཁ Kotlin Multiplatform KMP Λ༻͢ΔͱҟͳΔϓϥοτϑΥʔϜؒͰ Kotlin ίʔυΛڞ༗Ͱ͖Δ 5
KMP - ରԠϓϥοτϑΥʔϜ Android JVM iOS macOS Linux ... 6
Objective-C export ͱ
KMP - Apple platform 8
KMP - Apple platform 9
KMP - Apple platform 10
KMP - Apple platform 11
Objective-C header 12
Objective-C header 13
Objective-C export 14
Objective-C export Objective-C ͷϔομʔΛಡΉඞཁ͕͋Δ ͯ͢ͷ I/F ͕1ͭͷϔομʔʹ·ͱ·Δ Swift Β͘͠ͳ͍ API
͕ఏڙ͞ΕΔ͜ͱ͕͋Δ γʔϜϨεʹ౷߹Ͱ͖ͳ͍ 15
Swift export ͱ
Swift export Experimental 17
Swift export Experimental Kotlin Multiplatform Development Roadmap for 2024 ϩʔυϚοϓʹొ
18
Swift export Experimental Kotlin Multiplatform Development Roadmap for 2024 ϩʔυϚοϓʹొ
Kotlin Multiplatform Development Roadmap for 2025 ٸϐονͰ։ൃத 2025ͷඪ࠷ॳͷެ։൛ϦϦʔε 19
Swift export Experimental Kotlin Multiplatform Development Roadmap for 2024 ϩʔυϚοϓʹొ
Kotlin Multiplatform Development Roadmap for 2025 ٸϐονͰ։ൃத 2025ͷඪ࠷ॳͷެ։൛ϦϦʔε Kotlin 2.1.0 ॳظஈ֊ͷެ։ 20
Swift export Experimental What’s Next for Kotlin Multiplatform and Compose
Multiplatform – August 2025 Update suspend function Flow ͱ͍ͬͨඇಉظॲཧͷαϙʔτ 2026ʹ҆ఆ൛ͷϦϦʔεΛࢦ͢ 21
Swift export Experimental What’s Next for Kotlin Multiplatform and Compose
Multiplatform – August 2025 Update suspend function Flow ͱ͍ͬͨඇಉظॲཧͷαϙʔτ 2026ʹ҆ఆ൛ͷϦϦʔεΛࢦ͢ Kotlin 2.2.20 Experimental support 22
Swift export ͷ։ൃঢ়گ Experimental https://docs.google.com/spreadsheets/d/ 157wQt05ZyaJAP_P1wigXDs6nW9q7clqbpIDAfMrFhOg/ 23
Objective-C export ͱ Swift export ͷҧ͍
Top-level function Experimental Kotlin // Common.kt fun sharedFunction(): Int =
5 Objective-C export import Shared CommonKt.sharedFunction() Swift export import Shared sharedFunction() 25
Multi-module support Experimental Kotlin // Common.kt (Shared) fun sharedFunction(): Int
= 5 // Common.kt (module-a) fun sharedFunction(): Int = 10 Objective-C export import Shared CommonKt.sharedFunction() CommonKt_.sharedFunction() Swift export import Shared import ModuleA Shared.sharedFunction() ModuleA.sharedFunction() 26
Multi-module support Experimental Objective-C export // Shared.h __attribute__((objc_subclassing_restricted)) __attribute__((swift_name("CommonKt"))) @interface
SharedCommonKt : SharedBase + (int32_t)sharedFunction __attribute__((swift_name("sharedFunction()" ))); @end __attribute__((objc_subclassing_restricted)) __attribute__((swift_name("CommonKt_"))) @interface SharedCommonKt_ : SharedBase + (int32_t)sharedFunction __attribute__((swift_name("sharedFunction()" ))); @end Swift export // Shared.swift public func sharedFunction() -> Swift.Int32 { ExportedKotlinPackages.com.github.jetbrains. swiftexport.sharedFunction() } // ModuleA.swift public func sharedFunction() -> Swift.Int32 { ExportedKotlinPackages.com.github.jetbrains. modulea.sharedFunction() } 27
Package support Experimental Kotlin // MODULE: shared // FILE: Common.kt
package com.github.jetbrains.swiftexport fun sharedFunction(): Int = 5 // MODULE: shared // FILE: Common.kt package com.github.jetbrains.swiftexport.packagea fun sharedFunction(): Int = 10 28
Package support Experimental Objective-C export import Shared CommonKt.sharedFunction() CommonKt.sharedFunction_() Swift
export import Shared sharedFunction() packagea.sharedFunction() 29
Package support Experimental // ExportedKotlinPackages.swift public enum com { public
enum github { public enum jetbrains { public enum swiftexport { public enum packagea { } } } } } 30
Swift export ͷࢼ͠ํ Experimental // build.gradle.kts @OptIn(ExperimentalSwiftExportDsl::class) swiftExport { //
Root module name moduleName = "Shared" // Collapse rule flattenPackage = "com.github.jetbrains.swiftexport" } // Run Script Phase ./gradlew :shared:embedSwiftExportForXcode 31
Swift export ͷࢼ͠ํ Experimental https://github.com/Kotlin/swift-export-sample kotlin version Λ 2.2.20 ʹมߋ
32
·ͱΊ
·ͱΊ Swift ͔Β Kotlin Ͱॻ͔ΕͨॲཧΛݺͼग़͢ʹ Objective-C Λհ͢Δඞཁ͕͋Δ Objective-C export Objective-C
Λհ͞ͳ͍ Swift export ͕։ൃத Experimental Apple platform Ͱͷ KMP Λͬͨ։ൃऀମݧ্͕͢ΔݟࠐΈ 34