How do you use the `view model` for Kotlin Multipl...

# multiplatform

[vnycall74]

How do you use the view model for Kotlin Multiplatform(Desktop, Android) projects?
In Android, the view model extends ViewModel (Android), but that's a natural thing to say, Desktop hasn't ViewModel. So I can't use the common view model.

Additionally, I think some things, but It looks not good...

A. Inject view model of each platform

Window(onCloseRequest = { // Do something }, title = "Test") {
    val testViewModel by inject<TestViewModel>(TestViewModel::class.java)

    TesetScreen(
        user = testViewModel.user,
        testState = testViewModel.testState.collecAsState().value,
        testAction = testViewModel::testAction
    )
    
    DisposableEffect(Unit) {
        onDispose { 
            testViewModel.onCleared()
        }
    }
}

B. Use use-case direct in the Composable Screen

Window(onCloseRequest = { // Do something }, title = "Test") {
    val getUserUseCase by inject<GetUserUseCase>(GetUserUseCase::class.java)
    val getTestState by inject<GetUserUseCase>(GetUserUseCase::class.java)

    TesetScreen(
        user = testViewModel.user,
        testState = getTestState().collecAsState().value,
        testAction = { doSomething() }
    )
}

C. Don't use the view model...

What do you think about the above logic and how do you design architecture KMP?

[Mustafa Ozhan]

You can create an expect BaseViewModel, and in android you can extend it from android ViewModel, where in JVM you extend from nothing

I have similar aproach for android & iOS here:
common: https://github.com/Oztechan/CCC/blob/develop/client/src/commonMain/kotlin/com/oztechan/ccc/client/base/BaseViewModel.kt
android: https://github.com/Oztechan/CCC/blob/develop/client/src/androidMain/kotlin/com/oztechan/ccc/client/base/BaseViewModel.kt
ios: https://github.com/Oztechan/CCC/blob/develop/client/src/iosMain/kotlin/com/oztechan/ccc/client/base/BaseViewModel.kt

[vnycall74]

Thank you! I try it!