我有一个ViewModel类：

@HiltViewModel
open class AppViewModel @Inject constructor(
    private val savedStateHandle: SavedStateHandle
): ViewModel(){

    val isLoading: MutableState<Boolean> = mutableStateOf(false)

    fun setIsLoading(isLoading: Boolean){
        this.isLoading.value = isLoading
    }
}

该类应保存常规应用程序状态。
然后我有另一个ViewModel类，我想在其中修改AppViewModel状态。E、 g.当获取数据时，我想将isLoading设置为true并呈现进度条。应该修改AppViewModel状态的ChildViewModel类：

class ChildViewModel @Inject constructor(
    private val repository: Repository,
    private val savedStateHandle: SavedStateHandle
): AppViewModel(savedStateHandle){

    ...

    fun onTriggerEvent(event: RestApiEvents) {
        try {
            viewModelScope.launch {
                // this should change the state in AppViewModel
                isLoading.value = true
                when(event) {
                    is SearchEvent -> {
                        search(event.s)
                    }
                    else -> {
                        Log.d(TAG, "Event not found")
                    }
                }
                // this should change the state in AppViewModel
                isLoading.value = false
            }
        }
        catch (e: Exception){
            e.printStackTrace()
        }
    }

    private suspend fun search(s: String) {
        ...
    }
}