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嗨，我的提供程序中有一个方法可以从服务器返回项目列表：




Future<void> getServerMeals(String userName, DateTime date) async {
    final QueryBuilder<ParseObject> parseQuery =
        QueryBuilder<ParseObject>(ParseObject('UsersEaten'));

    parseQuery
      ..whereContains('eatenBy', userName)
      ..whereGreaterThanOrEqualsTo('createdAt', date);

    final ParseResponse apiResponse = await parseQuery.query();

    if (apiResponse.success && apiResponse.results != null) {
      List<dynamic>? apiRes = apiResponse.results;

      List<dynamic> newMeals = apiRes!
          .map((e) => EatenItem(
                id: e['objectId'],
                eatenCal: e['eatenCal'],
                eatenTitle: e['eatenTitle'],
                eatenImageUrl: e['eatenImg'],
                userId: e['objectId'],
              ))
          .toList();
      _eatenMeals = newMeals;
      print(apiResponse.results);
    }
  }

在我的屏幕上我有一个 FutureBuilder 并且我已经将该方法保存为未来：

DateTime now = DateTime.now();


 Container(
          height: MediaQuery.of(context).size.height * 0.6,
          margin: EdgeInsets.only(left: 30, right: 30),
          child: FutureBuilder(
            builder: (ctx, snapshot) {
              if (snapshot.connectionState == ConnectionState.waiting) {
                return Center(
                  child: CircularProgressIndicator(),
                );
              }

              return ListView.builder(
                itemCount: mealsList.eatenMeals.length,
                itemBuilder: (ctx, index) =>
                    DailyEaten(mealsList.eatenMeals[index]),
              );
            },
            future: Provider.of<EatenMeals>(context).getServerMeals(
                currentUser.username, DateTime(now.year, now.month, now.day)),
          ),
        ),

在 jalali_calendar 1.0.4 的帮助下，我还有一个日期选择器，它允许用户更改日期并从特定日期获取项目：

  Future<dynamic> _selectDate() async {
      String? picked = await jalaliCalendarPicker(
          context: context, convertToGregorian: true);
      final newDate = DateTime.parse(picked!);

      setState(() {
        now = newDate;
        print(now);
      });
    }

但是当我调用这个方法时，我的列表不会改变，我有刷新屏幕但我的数据是一样的。

我可以在控制台中看到“现在”变量的变化，但来自 FutureBuilder 的未来列表仍然相同。

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