Question

我是扑扑发展的新手。当来自包import 'package:socket_io/socket_io.dart';的{{1}}时出现上述错误

我正在尝试将Node js后端套接字连接到Flutter应用。我不使用模拟器，而是使用Samsung Tab作为外部设备。

这是我的客户程序

socket_io: ^0.9.0+1

这是pubspec.ymal

    void main() {
  var io = new Server();
    var nsp = io.of('/some');
    nsp.on('connection', (Socket client) {
      print('connection /some');
      client.on('msg', (data) {
        print('data from /some => $data');
        client.emit('fromServer', "ok 2");
      });
    });
      io.on('connection', (Socket client) {
        print('connection default namespace');
        client.on('msg', (data) {
          print('data from default => $data');
          client.emit('fromServer', "ok");
        });
      });
      io.listen(3000);

    // Dart client
    IO.Socket socket = IO.io('http://localhost:3000');
    socket.on('connect', (_) {
     print('connect');
     socket.emit('msg', 'test');
    });
    socket.on('event', (data) => print(data));
    socket.on('disconnect', (_) => print('disconnect'));
    socket.on('fromServer', (_) => print(_));
  runApp(new MyApp());
  }

这是我的后端服务，可以很好地写在节点上

: chat_app
description: A new Flutter project.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  socket_io: ^0.9.0+1
  socket_io_client: ^0.9.1
  http: ^0.12.0
  reflectable: ^2.0.9


dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

我希望我找不到答案，为什么会发生这种情况以及如何解决。请帮助

Answer 1

软件包socket_io与Flutter不兼容。因此，您不能在Flutter应用程序中使用它。

错误：使用--enable-mirrors = false导入dart：mirrors

1 个答案: