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iOSDC2025_ソニーのKMP/CMP挑戦記
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ソニー株式会社
September 19, 2025
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iOSDC2025_ソニーのKMP/CMP挑戦記
ソニー株式会社
September 19, 2025
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Transcript
@sergiocarrilho Sergio Carrilho ソニーのKMP/CMP挑戦記 Sony’s Story with KMP/CMP TechLead |
Sony
iOSエンジニアの可能性を広げる ソニーがKotlin/Compose Multiplatformに挑戦した理由 (あなたもぜひ)
iOSエンジニアの可能性を広げる ソニーがKotlin/Compose Multiplatformに挑戦した理由 (あなたもぜひ????)
01 Why KMP/CMP 02 How we did it? 03 Should
you do it?
None
2018
>>Next project...
UI UI Biz Logic Biz Logic Until now
UI UI Goal Biz Logic
Sensing trigger Context Action data
Requirement 1.iOS & Android 2.High performance 3.Platform APIs (BLE, GPS,
BG...)
Why
UI UI Business/Domain Data/Core iOS APIs Android APIs iOS Android
KMP (shared)
Native UIs Bytecode LLVM Kotlin Multiplatform JVM Kotlin/Native
Bytecode LLVM Kotlin Multiplatform JVM Kotlin/Native iOS framework
expect fun / class actual fun / class actual fun
/ class Common
expect fun randomUUID(): String import java.util.* actual fun randomUUID() =
UUID.randomUUID().toString() import platform.Foundation.NSUUID actual fun randomUUID(): String = NSUUID().UUIDString() Common
HOW Part 2
Hexagonal Architecture
None
Core: Biz logic, platform agnostic
Core: Biz logic, platform agnostic Platform: iOS/Android
Platform: iOS/Android Core: Biz logic, platform agnostic External / cloud:
Sensor, biz intelligence
Platform: iOS/Android Core: Biz logic, platform agnostic Adapters External /
cloud: Sensor, biz intelligence
2021 2023
2023
2023 Sony | Headphones Connect Sony | Sound Connect
Compose Multiplatform
UI UI Business/Domain Data/Core Presentation Presentation iOS Android KMP(shared) Kotlin
Multiplatform
iOS specific Android specific Business/Domain Data/Core iOS Android KMP(shared) Compose
Multiplatform UI Presentation
None
None
iOS Android
None
Maps
None
Results
55 55% % iOS iOS users P E R P
L AT FO R M
Code L A N G U AG E D I
ST. 80 20 Multiplatform Native
SHOULD YOU DO IT? Part 3
it depends...
Stick to iOS if... You want full iOS UX Target
market is iOS
Try KMP/CMP if... iOS Dev → Mobile Dev Expand to
other platforms A lot of common biz logic (>10%)
start
None
None
Kotlin/Swift Mapping Kotlin Swift Class Class Interface Protocol Constructor Initializer
Property Property Method Method null nil Kotlin Swift Unit Void String String List Array Set Set Map Dictionary Function type Function type
suspend vs async
None
iOS/Android dev Development Duplication Unification Mobile dev Users
TRY IT just
None