Not disposing the stream , but resetting the counter stream value to 0 and listening to it again

问题

I' m having a Counter Bloc and showing the counter on second page , I want to reset the counter value to 0(ZERO) on navigating back to first page or on pressing back button without disposing the stream so that i can listen to stream throughout the app.

In short whenever returning to second page the stream count should start from 0.

CounterBloc.dart

import 'dart:async';

class CounterBloc {
  int _counter = 0;
  StreamController<int> _countController = StreamController<int>.broadcast();

  Stream<int> get counterStream => _countController.stream;
  StreamSink<int> get counterSink => _countController.sink;

  void increamentCounter() {
    _counter++;
    counterSink.add(_counter);
  }
}

回答1:

You need to create a new method (action) inside your Bloc.

  void resetCounter() {
    _counter = 0;
    counterSink.add(_counter);
  }

来源：https://stackoverflow.com/questions/61694115/not-disposing-the-stream-but-resetting-the-counter-stream-value-to-0-and-liste