errors 属性

Stream errors

返回从隔离器中未捕获错误的广播流。

每个错误都作为流上的错误事件提供。

实际的错误对象和 stackTraces 不一定是实际隔离器中相同类型的对象，但它们的 Object.toString 结果将始终相同。

此流基于 addErrorListener 和 removeErrorListener。

实现

Stream get errors {
  StreamController controller = StreamController.broadcast(sync: true);
  RawReceivePort? port;
  void handleError(Object? message) {
    var listMessage = message as List<Object?>;
    var errorDescription = listMessage[0] as String;
    var stackDescription = listMessage[1] as String;
    var error = RemoteError(errorDescription, stackDescription);
    controller.addError(error, error.stackTrace);
  }

  controller.onListen = () {
    RawReceivePort receivePort = RawReceivePort(handleError);
    port = receivePort;
    this.addErrorListener(receivePort.sendPort);
  };
  controller.onCancel = () {
    var listenPort = port!;
    port = null;
    this.removeErrorListener(listenPort.sendPort);
    listenPort.close();
  };
  return controller.stream;
}