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

on YouTube ↗49m

" summary

Builds a small Kotlin Multiplatform library of DTOs then publishes it to a local Maven repo and uses it from a Ktor backend, an Android app and an iOS app. Faces iOS distribution pain, solves it with a fat framework + CocoaPods wrapper, hits Swift deserialization issues and Kotlin/Native concurrency errors that require changes to classes and to freeze mutable classes before crossing threads. Recommends starting very small, validates in production despite alpha status, then expand.

AI-written summary · about

" chapters (31)

1. 0:00Introduction and speaker intro
2. 1:39Story of Alice and Bob's bug
3. 3:08Story of Charlie's feature duplication
4. 4:38Cross-platform challenges with React Native
5. 6:25Why Kotlin Multiplatform fits
6. 7:06Approaching KMP in existing projects
7. 8:53Starting with boring or central code
8. 10:38Example starting points like DTOs
9. 11:21Building the shared foundation library
10. 12:25Creating the KMP project
11. 13:07Adding JVM target and publishing
12. 13:50Writing the shared DTO data class
13. 14:10Publishing and integrating the library
14. 14:40Using the library in Android client
15. 15:01Integrating with backend Ktor
16. 15:45iOS integration challenges
17. 16:33Distributing Kotlin frameworks to iOS
18. 18:46Creating fat frameworks for iOS
19. 19:27Configuring Gradle tasks for fat frameworks
20. 20:49Linking library in Xcode project
21. 21:56Publishing and versioning frameworks
22. 23:56iOS serialization issues with DTOs
23. 25:56Making DTOs compatible with Codable
24. 27:14Adjusting Kotlin DTOs for iOS
25. 28:16Threading and freezing DTOs
26. 30:59Creating base class for frozen DTOs
27. 31:48Summary of challenges faced
28. 33:50Lessons learned and project validation
29. 36:23Expanding KMP adoption at Unwire
30. 37:12References and resources
31. 37:35Q&A session

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