And that, folks, is how we shared code between Android, iOS and the Backend

on YouTube ↗50m

" summary

Shows a real migration: a shared KMP library (HN foundation) with DTOs published to a local Maven, consumed by an Android app, a Ktor backend endpoint, and an iOS app via a fat framework packaged to CocoaPods. Describes concrete fixes: convert data class to open class with var and empty ctor for Swift Decodable, add Stately freeze to avoid Kotlin/Native threading exceptions, automate Gradle tasks and pod publishing with scripts, later share the data layer with SQLDelight. Works in production at a startup but KMP is still alpha.

AI-written summary · about

" chapters (37)

1. 0:00Introduction and speaker intro
2. 1:13Common pitfalls in cross-platform development
3. 3:01Execution speed challenges in teams
4. 5:31Why Kotlin Multiplatform fits
5. 7:17Starting with Kotlin Multiplatform libraries
6. 9:49Choosing the right code to share
7. 10:12Building the shared library project
8. 12:24Publishing and integrating the library
9. 13:11Android integration demo
10. 13:34Backend integration demo
11. 13:55iOS integration challenges
12. 16:27CocoaPods plugin limitations
13. 17:10Creating FAT frameworks for iOS
14. 18:36CocoaPods repository setup
15. 19:37iOS dependency integration
16. 20:41Automating the build and publish process
17. 22:29iOS serialization issues
18. 24:35Implementing Decodable in Swift
19. 26:03Adjusting Kotlin models for Swift
20. 27:09Threading and immutability in Kotlin
21. 28:54Using Stately for freezing objects
22. 29:39Finalizing iOS integration
23. 30:01Summary of challenges faced
24. 31:05Gradle and project organization difficulties
25. 32:13Distributing iOS frameworks effectively
26. 32:55Handling serialization on iOS
27. 33:37Start small, validate, then expand
28. 34:47Expanding to full data layer sharing
29. 35:11References and resources
30. 35:33Q&A session begins
31. 37:44Future of Kotlin Multiplatform UI
32. 38:45Flutter vs Kotlin Multiplatform for UI
33. 39:49Dependency injection in Kotlin Multiplatform
34. 41:37Nullability agreements between backend and frontend
35. 43:06Android Studio plugin for Kotlin Multiplatform
36. 44:09Shared databases and networking support
37. 44:50Kotlin Multiplatform library list suggestion

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