如何在Future Builder flutter中等待ListView中的itemCount？

Future<List<String>> fetchData() async {
  // 模拟异步获取数据
  await Future.delayed(Duration(seconds: 2));
  return ['Item 1', 'Item 2', 'Item 3'];
}

Widget buildListView() {
  return FutureBuilder<List<String>>(
    future: fetchData(),
    builder: (BuildContext context, AsyncSnapshot<List<String>> snapshot) {
      if (snapshot.connectionState == ConnectionState.waiting) {
        // 如果数据还在加载中，显示加载中的UI
        return CircularProgressIndicator();
      } else if (snapshot.hasError) {
        // 如果发生错误，显示错误信息
        return Text('Error: ${snapshot.error}');
      } else {
        // 数据加载完成，显示ListView
        return ListView.builder(
          itemCount: snapshot.data.length,
          itemBuilder: (BuildContext context, int index) {
            return ListTile(
              title: Text(snapshot.data[index]),
            );
          },
        );
      }
    },
  );
}