如何在compose中观察livedata？

Question

我需要观察从 firebase 获取的列表的变化

viewModel.courseList.observe(viewLifeCycleOwner,{

})

但我无法使用viewLifeCycleOwner.

Answer 1

class MyViewModel: ViewModel() {
    private var _courseList = MutableLiveData<Whatever>()
    var courseList: LiveData<List<Whatever>> = _courseList
}

@Composable
fun MyComposable() {
    val list  = myViewModel.courseList.observeAsState().value
}

演示应用程序有大量示例： https://github.com/JohannBlake/Jetmagic