有一个问题我还没能解决,目前我有一个 Stream<List<SupplyHierarchy>> get suppliesHierarchyLevelFour => _supplyHierarchyLevelFourFetcher.stream;
final _supplyHierarchyLevelFourF
我在取消使用Stream.periodic构造函数创建的流时遇到问题。下面是我取消流的尝试。但是,我很难从内部作用域中提取出'count‘变量。因此,我不能取消订阅。import 'dart:async';
int count = 0;
final Stream newsStream = new Stream.periodic(
StreamController<UserModel> _controller = StreamController<UserModel>.broadcast();
SharedPreferences prefs = await SharedPreferences.getInstance(); var username = prefs.getString("username");
final r