小编sag*_*gar的帖子

问题是,每当我尝试触发"this.io.emit"事件时,就会发生TypeError.它仅在我在"socket.on"块内写入此语句"this.io.emit"时给出,否则,如果我在该块之外写入它则不会产生错误.

这是调用其他库的主要server.js文件:

const express = require('express'),
http = require('http'),
socketio = require('socket.io');

class App{

constructor()
{
    this.port =  process.env.PORT || 81;
    this.host = `localhost`;        
    this.app = express();
    this.http = http.Server(this.app);
    this.socket = socketio(this.http);
}
appConfig(){
    new config(this.app);
}
appRoutes(){
    new routes(this.app,this.socket).routesDefault();
}
appDefault(){
    this.appConfig();
    this.appRoutes();
    this.http.listen(this.port,this.host,()=> {
        console.log(`Listening`);
    });
}}

我的服务器端代码是:

'use strict';
class Routes {

constructor(app,socket) {
    this.app = app;
    this.io = socket;
    this.users=[];
}

routesTemplate()
{
    this.app.get('/',function(req,res){
        res.render('index');
    });
}

socketEvents()
{
    this.io.on('connection',(socket) => {
        socket.on('send message',function(data)
        { …