飘飘未来归零

https://stackoverflow.com/a/49146503/1757321

遵循解决方案,但在我的情况下不起作用。

今天下午给我一些启示

  Future<String> loadInterest() async {
    print('Going to load interests');

    final whenDone = new Completer();

    SharedPreferences prefs = await SharedPreferences.getInstance();

    final token = await prefs.getString('token');

    print('The token ${token}');

    await this.api.interests(token).then((res) {
      // print('The response: ${res['interests']}'); <-- this prints response alright. Data is coming.
      whenDone.complete(res['interests']);
    });

    return whenDone.future;
  }

那我就试着用上面的 Future

new FutureBuilder(
  future: loadInterest(),
  builder: (BuildContext context, snapshot) {
     return snapshot.connectionState == ConnectionState.done
            ? new Wrap(
                 children: InterestChips(snapshot.data),
              )
            : Center(child: CircularProgressIndicator());
         },
     ),

在哪里? InterestChips(...)

  InterestChips(items) {
    print('Interest Chips ${items}');
    List chipList;

    for (Object item in items) {
      chipList.add(Text('${item}'));
    }

    return chipList;
  }

但是,我总是 null 作为快照,这意味着 loadInterest() 未来 不会归还任何东西。

https://stackoverflow.com/a/49146503/1757321