Take you to have an in-depth understanding of WeChat applet integrated Huanxin SDK

var WebIM = require('../../utils/WebIM.js')
var WebIM = WebIM.default

hxloign: function () {
        var options = {
            apiUrl: WebIM.config.apiURL,
            user: 'u1',
            pwd: 'p1',
            grant_type: 'password',
            appKey: WebIM.config.appkey //应用key
        }
        WebIM.conn.open(options)
    },

 sendMessage: function () {

        var that = this
        var id = WebIM.conn.getUniqueId();
        var msg = new WebIM.message('txt', id);
        msg.set({
            msg: this.data.inputValue,//输入框的文本
            to: 'u0',
            roomType: false,
            success: function (id, serverMsgId) {
            }
        });
        msg.body.chatType = 'singleChat';
        WebIM.conn.send(msg.body);
    },

  getRoomPage: function () {
        return this.getPage("pages/index/index")//聊天界面
    },
   getPage: function (pageName) {
        var pages = getCurrentPages()
        return pages.find(function (page) {
            return page.__route__ == pageName
    })

   var that = this;
        WebIM.conn.listen({
            onTextMessage: function (message) {
                var page = that.getRoomPage()
                if (message) {
                    if (page) {
                        page.receiveMsg(message, 'txt')//receiveMsg方法就是咱在自己界面定义的方法
                     }else{
                        //界面不存在
                      }
                }
            }
        })

receiveMsg: function (msg, type) {
        console.log(msg);
    },