doublesymmetry / multiplatform-viewmodel

Shared ViewModel in Kotlin Multiplatform

multiplatform-viewmodel 🗳

Create shared ViewModel's for shared business logic using our ViewModel base class.

Features

• Uses Jetpack ViewModel on Android for lifecycled
• Exposes a CoroutineScope to be used in your methods

Overview of Package

This package has 1 component to it: A ViewModel class you can base your view models on.

Getting Started

Add Dependency

commonMain {
    dependencies {
        // ...
        api("com.doublesymmetry:multiplatform-viewmodel:0.0.1")
    }
}

Expose it to iOS native side

ios {
    binaries {
        framework {
            baseName = "shared"
            export(Deps.viewmodel) // required to expose the class to iOS
        }
    }
}

Using the ViewModel

class ExampleViewModel: ViewModel() {
    private val _viewState = MutableStateFlow(UIViewState())
    val viewState: StateFlow<UIViewState> = _viewState
 
    fun onLaunched() {
        scope.launch {
            // fetch some data
            _viewState.emit(newState)
        }
    }
}

Using your ViewModel on iOS with a UIViewController

When using it on iOS you'll want to make sure that you call clear() on your ViewModel on deinit to properly kill the CoroutineScope