我正尝试从素材库实现PullToRefresh组件，但即使1：1复制Google自己的代码，滑动也不会触发任何东西。https://developer.android.com/reference/kotlin/androidx/compose/material/pullrefresh/package-summary.html
我已经能够减少他们的代码，以最小的可复制的样本。加载程序将显示如果您手动设置为真，但不会触发刷卡。
视图不需要任何其他内容，例如，无论Box组件中还有什么，加载器都应该显示。

import androidx.compose.foundation.layout.*
import androidx.compose.material.ExperimentalMaterialApi
import androidx.compose.material.pullrefresh.PullRefreshIndicator
import androidx.compose.material.pullrefresh.pullRefresh
import androidx.compose.material.pullrefresh.rememberPullRefreshState
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview

@OptIn(ExperimentalMaterialApi::class)
@Composable
fun PullToRefreshComposableTEST() {

    var loading by remember {
        mutableStateOf(true)
    }

    val pullRefreshState = rememberPullRefreshState(
        refreshing = loading,
        onRefresh = {
            loading = true
        })

    Box(
        Modifier.fillMaxSize().pullRefresh(pullRefreshState)
    ) {
        PullRefreshIndicator(
            modifier = Modifier.align(Alignment.TopCenter),
            refreshing = loading,
            state = pullRefreshState
        )
    }
}

@Preview(showSystemUi = true)
@Composable
private fun Preview() {
    PullToRefreshComposableTEST()
}