uniapp使用webSocket通讯

1.创建webSocketHttp.js文件

//导入系统方法
class webSocket {
    //是否打开连接
    isOpen = false
    //全局的定时器
    globalTimer = null
    //存储task对象
    socketTask = null
    //连接socket
    async connectSocket(
        linkMark,    //连接标识
        option = {},  //连接需要带的额外的参数
        successFunc = null,   //连接成功回调
        errorFunc = null,        //连接错误回调
        receiveFunc = null,   //接收到消息回调
        closeFunc = null       //连接关闭回调
    ) {
        try {
            //如果连接已存在并且已经打开就不再连接
            if (this.socketTask && this.isOpen) {
                    return
            }
            //获取对应的长连接URL
            let url = linkMark
            //建立连接
            this.socketTask = uni.connectSocket({
                    url,
                    success() {
                            console.log('websocket:' + linkMark + '连接成功！')
                    }
            })
            //监听打开事件
            this.socketTask.onOpen((res) => {
                    console.log('websocket:' + linkMark + '打开成功！')
                    this.isOpen = true
                    this.sendMessage(option, null, () => {})
                    //开启心跳检测
                    this.heartBeatTest(option)
                    //回调
                    if (successFunc) {
                            successFunc(res)
                    }
            })
            //监听连接关闭事件
            this.socketTask.onClose(() => {
                    console.log('websocket:' + linkMark + '已关闭！')
                    this.isOpen = false
                    this.closeSocket()
                    if (closeFunc) {
                            closeFunc()
                    }
            })
            //监听websocket错误事件
            this.socketTask.onError((res) => {
                    console.log('websocket:' + linkMark + '已出错！')
                    this.isOpen = false
                    if (errorFunc) {
                            errorFunc(res)
                    }
            })
            //监听接收到的消息
            this.socketTask.onMessage((res) => {
                    // console.log('监听接收到的消息')
                    if (receiveFunc) {
                            receiveFunc(res)
                    }
            })
        } catch (error) {
            console.log('websocket:' + linkMark + '异常:' + error)
        }
    }
    //发送消息(msg是一个对象)
    sendMessage(msg = null, successFunc = null, errorFunc = null) {
        if (!this.socketTask || !this.isOpen || !msg) {
            if (errorFunc) {
                    errorFunc('未传消息内容或连接未打开！')
            }
            return
        }
        this.socketTask.send({
            data: JSON.stringify(msg),
            success(res) {
                    if (successFunc) {
                            successFunc(res)
                    }
            },fail(err) {
                    if (errorFunc) {
                            errorFunc(err)
                    }
            }
        })
    }
    //关闭连接
    closeSocket() {
            console.log('关闭链接')
            if (!this.socketTask || !this.isOpen) {
                    return
            }
            //关闭socket连接
            this.socketTask.close()
            //设置关闭状态
            this.isOpen = false
    }
    //心跳检测
    heartBeatTest(option) {
            //清除定时器
            clearInterval(this.globalTimer)
            this.globalTimer = setInterval(() => {
                    this.sendMessage({code:10015}, null, () => {
                            //如果失败则清除定时器
                            clearInterval(this.globalTimer)
                    })
            }, 10000)
    }
}
export default webSocket

2.在需要使用的的页面引入（也可全局引入）

import webSocket from '@/utils/webscoketHttp.js'
const websocket = new webSocket()

3.创建连接监听心跳

   buildWebSocket() {
    let that = this;
    try {
        websocket.connectSocket(
            getApp().globalData.wsApiUrl,//连接标识
            { //可以传递额外的参数
                token:'',
                code:10080,//活跃通道
            },
            null,
        () => {
                //出错的回调,重新建立连接
                // setTimeout(() => {
                // 	that.buildWebSocket()
                // }, 5000)
        },(msg) => {
            //根据接收到的消息来处理业务逻辑
            //连接回调
            let res = JSON.parse(msg.data)
       },() => {
            //关闭了就重新连接
            // setTimeout(() => {
            // 	this.buildWebSocket()
            // }, 2000)
        })
        } catch (error) {
            console.log('live socket err:' + error)
        }
    },