iOSDC2025_ソニーのKMP/CMP挑戦記

by ソニー株式会社

Slide 1

Slide 1 text

@sergiocarrilho Sergio Carrilho ソニーのKMP/CMP挑戦記 Sony’s Story with KMP/CMP TechLead | Sony

Slide 2

Slide 2 text

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）

Slide 3

Slide 3 text

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????）

Slide 4

Slide 4 text

01 Why KMP/CMP 02 How we did it? 03 Should you do it?

Slide 5

Slide 5 text

No content

Slide 6

Slide 6 text

2018

Slide 7

Slide 7 text

>>Next project...

Slide 8

Slide 8 text

UI UI Biz Logic Biz Logic Until now

Slide 9

Slide 9 text

UI UI Goal Biz Logic

Slide 10

Slide 10 text

Sensing trigger Context Action data

Slide 11

Slide 11 text

Requirement 1.iOS & Android 2.High performance 3.Platform APIs (BLE, GPS, BG...)

Slide 12

Slide 12 text

Why

Slide 13

Slide 13 text

UI UI Business/Domain Data/Core iOS APIs Android APIs iOS Android KMP (shared)

Slide 14

Slide 14 text

Native UIs Bytecode LLVM Kotlin Multiplatform JVM Kotlin/Native

Slide 15

Slide 15 text

Bytecode LLVM Kotlin Multiplatform JVM Kotlin/Native iOS framework

Slide 16

Slide 16 text

expect fun / class actual fun / class actual fun / class Common

Slide 17

Slide 17 text

expect fun randomUUID(): String import java.util.* actual fun randomUUID() = UUID.randomUUID().toString() import platform.Foundation.NSUUID actual fun randomUUID(): String = NSUUID().UUIDString() Common

Slide 18

Slide 18 text

HOW Part 2

Slide 19

Slide 19 text

Hexagonal Architecture

Slide 20

Slide 20 text

No content

Slide 21

Slide 21 text

Core: Biz logic, platform agnostic

Slide 22

Slide 22 text

Core: Biz logic, platform agnostic Platform: iOS/Android

Slide 23

Slide 23 text

Platform: iOS/Android Core: Biz logic, platform agnostic External / cloud: Sensor, biz intelligence

Slide 24

Slide 24 text

Platform: iOS/Android Core: Biz logic, platform agnostic Adapters External / cloud: Sensor, biz intelligence

Slide 25

Slide 25 text

2021 2023

Slide 26

Slide 26 text

2023

Slide 27

Slide 27 text

2023 Sony | Headphones Connect Sony | Sound Connect

Slide 28

Slide 28 text

Compose Multiplatform

Slide 29

Slide 29 text

UI UI Business/Domain Data/Core Presentation Presentation iOS Android KMP(shared) Kotlin Multiplatform

Slide 30

Slide 30 text

iOS specific Android specific Business/Domain Data/Core iOS Android KMP(shared) Compose Multiplatform UI Presentation

Slide 31

Slide 31 text

No content

Slide 32

Slide 32 text

No content

Slide 33

Slide 33 text

iOS Android

Slide 34

Slide 34 text

No content

Slide 35

Slide 35 text

Maps

Slide 36

Slide 36 text

No content

Slide 37

Slide 37 text

Results

Slide 38

Slide 38 text

55 55% % iOS iOS users P E R P L AT FO R M

Slide 39

Slide 39 text

Code L A N G U AG E D I ST. 80 20 Multiplatform Native

Slide 40

Slide 40 text

SHOULD YOU DO IT? Part 3

Slide 41

Slide 41 text

it depends...

Slide 42

Slide 42 text

Stick to iOS if... You want full iOS UX Target market is iOS

Slide 43

Slide 43 text

Try KMP/CMP if... iOS Dev → Mobile Dev Expand to other platforms A lot of common biz logic (>10%)

Slide 44

Slide 44 text

start

Slide 45

Slide 45 text

No content

Slide 46

Slide 46 text

No content

Slide 47

Slide 47 text

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