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KMP ͷ Swift export
2025/10/2 extension DC 2025 Day2 @Sansan
Koki Hirokawa
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@pihero13
KokiHirokawa
Sony Honda Mobility Inc.
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Swift export ͱ Experimental
Objective-C Λհͣ͞ʹ Swift ͔Β Kotlin Ͱॻ͔ΕͨॲཧΛݺͼग़ͨ͢Ίͷٕज़
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ΞδΣϯμ
KMP ͱ
Objective-C export ͱ
Swift export ͱ
Objective-C export ͱ Swift export ͷҧ͍
·ͱΊ
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KMP ͱ
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KMP - ֓ཁ
Kotlin Multiplatform
KMP Λ༻͢ΔͱҟͳΔϓϥοτϑΥʔϜؒͰ Kotlin ίʔυΛڞ༗Ͱ͖Δ
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KMP - ରԠϓϥοτϑΥʔϜ
Android
JVM
iOS
macOS
Linux
...
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Objective-C export ͱ
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KMP - Apple platform
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KMP - Apple platform
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KMP - Apple platform
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KMP - Apple platform
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Objective-C header
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Objective-C header
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Objective-C export
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Objective-C export
Objective-C ͷϔομʔΛಡΉඞཁ͕͋Δ
ͯ͢ͷ I/F ͕1ͭͷϔομʔʹ·ͱ·Δ
Swift Β͘͠ͳ͍ API ͕ఏڙ͞ΕΔ͜ͱ͕͋Δ
γʔϜϨεʹ౷߹Ͱ͖ͳ͍
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Swift export ͱ
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Swift export Experimental
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Swift export Experimental
Kotlin Multiplatform Development Roadmap for 2024
ϩʔυϚοϓʹొ
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Swift export Experimental
Kotlin Multiplatform Development Roadmap for 2024
ϩʔυϚοϓʹొ
Kotlin Multiplatform Development Roadmap for 2025
ٸϐονͰ։ൃத
2025ͷඪ࠷ॳͷެ։൛ϦϦʔε
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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։
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Swift export Experimental
What’s Next for Kotlin Multiplatform and Compose Multiplatform – August
2025 Update
suspend function Flow ͱ͍ͬͨඇಉظॲཧͷαϙʔτ
2026ʹ҆ఆ൛ͷϦϦʔεΛࢦ͢
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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
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Swift export ͷ։ൃঢ়گ Experimental
https://docs.google.com/spreadsheets/d/
157wQt05ZyaJAP_P1wigXDs6nW9q7clqbpIDAfMrFhOg/
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Objective-C export ͱ
Swift export ͷҧ͍
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Top-level function Experimental
Kotlin
// Common.kt
fun sharedFunction(): Int = 5
Objective-C export
import Shared
CommonKt.sharedFunction()
Swift export
import Shared
sharedFunction()
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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()
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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()
}
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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
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Package support Experimental
Objective-C export
import Shared
CommonKt.sharedFunction()
CommonKt.sharedFunction_()
Swift export
import Shared
sharedFunction()
packagea.sharedFunction()
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Package support Experimental
// ExportedKotlinPackages.swift
public enum com {
public enum github {
public enum jetbrains {
public enum swiftexport {
public enum packagea {
}
}
}
}
}
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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
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Swift export ͷࢼ͠ํ Experimental
https://github.com/Kotlin/swift-export-sample
kotlin version Λ 2.2.20 ʹมߋ
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·ͱΊ
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·ͱΊ
Swift ͔Β Kotlin Ͱॻ͔ΕͨॲཧΛݺͼग़͢ʹ Objective-C Λհ͢Δඞཁ͕͋Δ
Objective-C export
Objective-C Λհ͞ͳ͍ Swift export ͕։ൃத
Experimental
Apple platform Ͱͷ KMP Λͬͨ։ൃऀମݧ্͕͢ΔݟࠐΈ
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