Support Kotlin + Swift in Turbo Module with backward compat

[vicary]

We have some hardware SDKs (thermal printers) written in Kotlin and Swift, we would like to use create-react-native-library to create a React Native wrapper for both of them.

Currently for the Turbo Module with backward compat option it only allows Kotlin + Objective-C, is it possible to create Kotlin + Swift template?

[atlj]

We have some hardware SDKs (thermal printers) written in Kotlin and Swift, we would like to use create-react-native-library to create a React Native wrapper for both of them.

Currently for the Turbo Module with backward compat option it only allows Kotlin + Objective-C, is it possible to create Kotlin + Swift template?

Currently there is no Swift template for TurboModules. Here how you can work with Swift on TurboModules for the time being:

1. Open the module on Xcode ( not the example app )
2. Create a Swift file and make sure to create the brigding header.
3. Add @objc public to your classes and methods you want to use
4. Go to your example app's project on Xcode
5. Go to the .mm file
6. Import the swift headers (they are named like the following: (your podspec name)-Swift.h
7. Now you can import the swift methods and classes from objective c++

You can also take a look at React Native Community's sample https://github.com/react-native-community/RNNewArchitectureLibraries/tree/feat/turbomodule-swift

[vicary]

Looking at any one sources really doesn't give enough knowledge over these topics:

1. XCode configurations
2. Swift
3. Bridging Headers
4. Objective C++ (I combined the .h and .mm from your objc template into one single .m for Swift)
5. How to properly place macros for both oldarch and newarch

After a few days of crawling through different sources, I think I did the job and made react-native-citizen-escposprinter works in all four environments.

[antonyjoemathew]

@atlj @vicary I'm working on creating a React wrapper for my Swift SDK, and I've followed the same approach. However, I'm facing an issue where I cannot import my Swift module in the Appdelegate.mm file. Are there additional steps or considerations I should take to address this issue?

[vicary]

My memory really faded after almost a year, since my package is working properly since then.

The first thing comes into my mind is that for both newarch and "oldarch" to work, you have to ditch .h and .mm and use a single .m to bridge your Swift module into objc

[antonyjoemathew]

Thank you @vicary for your quick reply:)

[gladiuscode]

@antonyjoemathew Hi!

Where you able to run your Swift code inside the AppDelegate.mm file?
I'm trying right know but I'm stuck. Xcode isn't generating my Pod-Name-Swift.h so my app can't compile.

I've got the following files: Name.m, Name.swift and Pod-Name-Bridging-Header.h.
My swift class is public and has @objc annotation.

Any help would be gladly appreciated :)

[JeanSadatAt]

[vicary]

@atlj tagging you for you are a maintainer. Not sure what to do yet, just raising awareness.

GitHub doesn't seem to allow reporting discussion comments, but this user is suspicious enough. With the recent hype on ChatGPT, this may be the beginning of something really annoying.

[MateWW]

@vicary I've deleted it as nonsense truly generated by chat GPT.
Thanks for reporting!

[vicary]

@MateWW love the swift action (pun intended)

[atlj]

Deleting comments generated by ChatGPT. We truly became Stack Overflow 😅

[vicary]

These junks will inevitably be fed to future iterations such as GPT-4, the cycle has begun.

[troZee]

Probably this issue is related to #342

[antonyjoemathew]

Hi, I've resolved the problem by creating Objective-C files for the bridging, and from there, I called the functions in the Swift files

…

On Thu, 16 May 2024 at 03:25, gladius ***@***.***> wrote: @antonyjoemathew <https://github.com/antonyjoemathew> Hi! Where you able to run your Swift code inside the AppDelegate.mm file? I'm trying right know but I'm stuck. Xcode isn't generating my Pod-Name-Swift.h so my app can't compile. I've got the following files: Name.m, Name.swift and Pod-Name-Bridging-Header.h. My swift class is public and has @objc <https://github.com/objc> annotation. Any help would be gladly appreciated :) — Reply to this email directly, view it on GitHub <#351 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACESDVQAAWEJI3PWCIMFKSDZCPKWVAVCNFSM6AAAAAAUB24DYWVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4TINJRGAYTI> . You are receiving this because you were mentioned.Message ID: <callstack/react-native-builder-bob/repo-discussions/351/comments/9451014@ github.com>

-- Regards Antony Joe Mathew +971555167780 +919496371536

[vicary]

Would you please share some high level steps so people can follow in the future?

[gladiuscode]

@vicary I've found a way.
I'll document the entire process in the this thread that I've opened specifically for the library I'm developing.

Thanks you all!

[snowinszu]

Hello, any news? Will Kotlin + Swift in Turbo Module be supported soon?

[C0C41N]

I was able to create a library using TurboModules and Swift
It worked in example app, but I couldn't use that library inside a project created with react-native v0.76

So I guess I'll stick with older version and using old arch for now :(

I think after we have support for Swift in TurboModules along with SPM packages then we can make something production ready using the new architecture.

[gladiuscode]

Hi @C0C41N,

I've developed the following library: react-native-orientation-director using turbo modules with backward compatibility. I've written them using Kotlin, Swift and Typescript.

It is currently working both on the example app using .75.x and a couple of applications that are running in production, with use_framework enabled.

I'm planning the example app migration to .76.x, could you share the issues you've got?
Is you example app running .76.x?

I'll update this conversation as soon as I've got more feedback on my migration.

Thank you!

[Zach-Dean-Attractions-io]

I have managed to call into Swift from Objective-C++ using the Turbo Native module template in version 0.48.6 of create-react-native-library. This includes publishing the library and importing it into a standalone app. I detailed my findings here: #783