register method

bool register(
  1. String key,
  2. EventListen listen, {
  3. bool replace = true,
})

注册监听

Implementation

bool register(String key, EventListen listen, {bool replace = true}) {
  ///需要返回订阅者，所以不能使用下面这种形式
  ///没有指定类型，全类型注册
  if (!replace) {
    if (_streamState.containsKey(key)) {
      return false;
    }
  } else {
    _streamListen[key] = listen;

    if (!_streamState.containsKey(key)) {
      _controller[key] = StreamController<_EventData>.broadcast();
      Stream<_EventData> stream = _controller[key]!.stream.cast<_EventData>();
      _streamState[key] = stream.listen(_listenCallback);
    }
  }

  return true;
}