Hey all - sorry for the delayed response. I was on...

# orbit-mvi

[Mikolaj Leszczynski]

Hey all - sorry for the delayed response. I was on holiday.
Since there have been a few questions regarding Orbit's iOS/KMP support here's the current context:

1. We have very limited time to work on Orbit due to work/family/health obligations so we are focusing on core functionality and KMP support. We are very careful about what features/projects we take on.
2. Please assume no further work will be done on the Orbit Swift plugin. We consider improved Swift support to be out of scope due to the amount of work required and the fact KMP support has now vastly improved and there are already some much better alternatives, such as the excellent SKIE project.
3. We will consider working on better KMP support where Orbit is still rough around the edges even after applying other patterns like KMP ViewModels, SKIE. Please file tickets with specific improvement ideas, since we have limited opportunities to explore KMP on our own.
4. We are aiming to provide some guidance around KMP extension projects to consider when using Orbit in iOS. In the meantime, here is a number of projects to consider:
a. SKIE
b. https://moko.icerock.dev
c. https://github.com/rickclephas/KMP-NativeCoroutines
d. https://github.com/rickclephas/KMM-ViewModel
e. Thanks to @Guilherme Delgado for the last two. Note that we've done limited research ourselves, so please use your own judgement here.
Hopefully this anwers your questions @Jacob Rhoda

[Guilherme Delgado]

Thanks for your clarification 🙌

[Mikolaj Leszczynski]

I would appreciate your thoughts and comments on this 🙂

[Guilherme Delgado]

I’m creating a new POC to explore wasm (while sharing VM between Android, iOS, Desktop and Wasm) and after it I’ll share my thoughts and also publish this POC 😊

[Guilherme Delgado]

Quick preview I can share 🙂

poc.mov

[Guilherme Delgado]

• Kotlin Multiplatform (KMP) with FSM and UDF shared between Android, iOS, Desktop, Web (via Wasm) with UI + FSM state restoration;
• Compose Multiplatform (CMP) for wasmJs , desktop e android and iOS (also with a SwiftUI sample)

[Guilherme Delgado]

When ready I’ll make it public 😉

[Guilherme Delgado]

(used rickclephas’s KMP-NativeCoroutines and KMM-ViewModel libs)

[Jacob Rhoda]

Is the idea that you use the KMM-ViewModel lib to handle observing the state changes, rather than the state Flow? In that case, does it use KMP-NativeCoroutines (or potentially SKIE) to observe the sideEffect flow?

[Guilherme Delgado]

I use the stateFlow and the KMM-ViewModel library helps with the lifecycles. Then I use KMP-NativeCoroutines to extends it to iOS to asyncAwait, etc.

[Guilherme Delgado]

private val _uiState = MutableStateFlow(viewModelScope, TimerUiState())

@NativeCoroutinesState
val uiState = _uiState.asStateFlow()

[Guilherme Delgado]

this is just the setup I need ^, pretty simple

[Guilherme Delgado]

(and extend my viewmodels from KMMViewModel)

[Jacob Rhoda]

So you’re not even using Orbit then?

[Guilherme Delgado]

I don't, because there's no KMP support 🫠

[Jacob Rhoda]

Oh, I thought the thought was to use KMM-ViewMode like the Android version of Orbit.

[Guilherme Delgado]

Orbit could use it for us

[Guilherme Delgado]

but then again, Google is making that move

[Guilherme Delgado]

let’s see also how it impacts KMM-ViewModel

[Jacob Rhoda]

It’s my understanding that to use Orbit with Android ViewModel, you implement ContainerHost and subclass from ViewModel. Couldn’t you substitute the Android ViewModel for KMMViewModel?

[Guilherme Delgado]

that’s a good questions for @Mikolaj Leszczynski, but I would say yes.

[Guilherme Delgado]

actually with orbit “KMP” I guess we must use dev.icerock.moko.mvvm.viewmodel.ViewModel

[Guilherme Delgado]

ContainerHost doesn’t care about VM, only the scope (viewmodelScope in this case)

[Jacob Rhoda]

Yes, that’s another option.

[Jacob Rhoda]

I ended up rolling my own, but it doesn’t handle lifecycle which I would like it to.

[Guilherme Delgado]

the question is, how well does Orbit works with KMP-Coroutines

[Guilherme Delgado]

@Jacob Rhoda I have this public POC: https://github.com/GuilhE/Expressus

[Mikolaj Leszczynski]

correct, the Orbit Container 's only dependency is a CoroutineScope

[Guilherme Delgado]

it uses Orbit in “KMP” but I made the logic by hand since the gradle plugin doesn’t work

[Guilherme Delgado]

I use Combie (Publishers) instead of async await (KMP-Coroutines gives you that option)

[Mikolaj Leszczynski]

thanks for your example @Guilherme Delgado, I'll take a look when we get to work on the KMP guidance

[Guilherme Delgado]

in my new POC I’m testing KMP-VM and KMP-Coroutines

[Guilherme Delgado]

not yet ready but I’ll share it when it becomes 😊

[Mikolaj Leszczynski]

give SKIE a try as well 😉

[Mikolaj Leszczynski]

as far as their selling point goes, it builds swift-native wrappers for Kotlin Flows and coroutines

[Jacob Rhoda]

The problem with SKIE is that it’s harder to figure out how to adapt an async-await Flow to @ObservableObject since it doesn’t use Combine…

[Mikolaj Leszczynski]

yeah KMP-coroutines looks good on that front

[Guilherme Delgado]

yah, I haven’t tried SKIE (first because it was payed back then) and it looks like a bazuca for me

[Guilherme Delgado]

I’m more a lightweight guy 😅 that’s why I choose Orbit

[Guilherme Delgado]

Here it is guys, published 😊

repo: https://github.com/GuilhE/WhosNext
wasm: https://guilhe.github.io/WhosNext/