node.js - Socket.io 广播无法正常工作

Question

我有以下代码：

var room = "1";
var chat = io.connect("localhost:3700/");
    self.chat = chat;
    chat.on("connection", function(socket){
        socket.emit("room", room);
        socket.on('message', function (data) {
            self.receiveMessage(data);
        });
    });

 chat.broadcast.to(room).emit('send',"HEllo");

接收消息：

receiveMessage: function(data){

        var $elem = $("#chat1");
        var $content = $elem.find(".messageText");
        if(data.message) {
            messages.push(data);
            var html = '';
            for(var i=0; i<messages.length; i++) {
                html += '<b>' + (messages[i].username ? messages[i].username : 'Server') + ': </b>';
                html += messages[i].message + '<br />';
            }
            $content.html(html);
        } else {
            console.log("There is a problem:", data);
        }
    }

该行chat.broadcast.to(room).emit('send',"HEllo");给了我错误：

未捕获的类型错误：无法调用未定义的方法“到”

我究竟做错了什么？

Answer 1

不太确定，但我认为您只能在连接时发送广播。

你可以试试这个：

var room = "1";
var chat = io.connect("localhost:3700/");
    self.chat = chat;
    chat.on("connection", function(socket){
        socket.emit("room", room);
        socket.on('message', function (data) {
            self.receiveMessage(data);
        });


        chat.broadcast.to(room).emit('send',"HEllo");
    });

当然，您也可以在单独的处理程序中发送广播，即：

var room = "1";
var chat = io.connect("localhost:3700/");
    self.chat = chat;
    chat.on("connection", function(socket){
        socket.emit("room", room);
        socket.on('message', function (data) {
            self.receiveMessage(data);
        });

        socket.on('foo event', function(data) {
            chat.broadcast.to(room).emit('send',"HEllo");
        }
    });