flutter - 如何获得 flutter 的future.wait响应？

Question

如何获得 flutter 的future.wait响应？？？我做了一个类型转换，但它仍然不起作用。

错误:

[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: type 'Future<List<Map<String, dynamic>>>' is not a subtype of type 'List<Map<String, dynamic>>' in type cast

代码:

Future<void> addNewTask(User data, [BuildContext context]) async {

    Future<List<Map<String, dynamic>>> responses = Future.wait([
      Database.addUser(uid, data.toMap()),
      Database.addSetting(uid, data.toMap())
    ]);

     List<Map<String, dynamic>> firstResponse = responses as List<Map<String, dynamic>>;
}

Answer 1

这是正确的答案。在 future.await 前面添加了等待并从 List<Map<String, dynamic>> 中删除 future

Future<void> addNewTask(User data, [BuildContext context]) async {

    List<Map<String, dynamic>> responses = await Future.wait([
      Database.addUser(uid, data.toMap()),
      Database.addSetting(uid, data.toMap())
    ]);
}