Jetpack Compose Bottomsheet with empty sheet content with empty sheet(Jetpack Compose Bottomsheet with empty sheet content with empty sheet content with expnaded

Question

我正在尝试通过BottomSheetScaffold来实现一些自定义实现的modalBottomSheet。

这是我的BottomSheetScaffold

BottomSheetScaffold(
    sheetPeekHeight = 0.dp,
    scaffoldState = bottomSheetState,
    sheetBackgroundColor = Color.Transparent,
    backgroundColor = Color.Transparent,
    sheetElevation = 0.dp,
    sheetShape = RoundedCornerShape(topStart = 36.dp, topEnd = 36.dp),
    snackbarHost = snackBarHost,
    sheetContent = { bottomSheet() }) {
    Box(Modifier.fillMaxSize()) {
        val coroutineScope = rememberCoroutineScope()
        sheetContent()
        Scrim(
            color = Primary,
            alpha = bottomSheetState.currentFraction * 0.5f,
            onDismiss = {
                coroutineScope.launch { bottomSheetState.bottomSheetState.collapse() }
            },
            visible = bottomSheetState.bottomSheetState.targetValue != BottomSheetValue.Collapsed && bottomSheetState.bottomSheetState.currentValue != BottomSheetValue.Collapsed
        )
    }
}

当这个scaffold被某些屏幕调用时，sheetContent()将被替换为屏幕内容。我这里的问题是，当bottomSheet()在屏幕上是空的，因此没有高度，底部的表单状态认为它是扩展的，而我只是没有在bottomSheet()中放入composable，它只是根据一些条件填充，没有默认的composable。因此，Scrim()函数将是可见的，当我单击它时，将抛出此异常

java.lang.IllegalArgumentException: The target value must have an associated anchor.

Answer 1

虽然sheetContent对于BottomSheetScaffold是必需的，但似乎无法处理空值，因为处理滑动的BottomSheetState类需要锚点来获取高度和空值，从而导致意外的结果