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在需要启用的地方调用app.js中的openScoket()函数；停用的地方调用closeSocket()函数
// app.js App({ onLaunch() { // 如果存在相关信息，连接websocket if ( this.globalData.
socketStatus=== 'closed') { this.openScoket(); } }, // 打开websocket连接 openScoket(
) { const token = wx.getStorageSync('yun_token').token || ""; const uuid = wx.
getStorageSync('schoolMsg').uuid || ""; // 打开信道(通过 WebSocket 连接发送数据。需要先
wx.connectSocket，并在 wx.onSocketOpen 回调之后才能发送。) wx.connectSocket({ url: "",
header: { //请求头 'content-type': 'application/json', }, timeout: 7000, success: (
) => { console.log("websocke连接成功"); }, fail: (err) => { if (err) { console.log(
"wx.connectSocket连接失败", err) } }, complete: () => { //
console.log("websocke连接完成") } }); //监听 WebSocket 连接打开 wx.onSocketOpen(() => {
console.log('WebSocket 已打开连接,并且连接成功'); this.globalData.socketStatus =
'connected'; }) //断开时的动作 wx.onSocketClose(() => { console.log('WebSocket 已断开');
this.globalData.socketStatus = 'closed'; //断线重连 this.reconnect(); }) //报错时的动作 wx
.onSocketError(error => { console.error('socket error出错了:', error); this.
reconnect(); }) // 监听服务器推送的消息 wx.onSocketMessage(message => { //把JSONStr转为JSON
message= message.data.replace(" ", ""); if (typeof message != 'object') {
message= message.replace(/\ufeff/g, ""); //重点 const msg = JSON.parse(message);
message= msg; } //callback函数对服务端发送的消息进行处理 this.globalData.callback(message); //
console.log("监听到如下数据发送变化：", message); }) }, //关闭websocket连接 closeSocket() { if (
this.globalData.socketStatus === 'connected') { wx.closeSocket({ success: () =>
{ this.globalData.socketStatus = 'closed'; console.log("websocket连接已关闭") } }) }
}, //发送消息函数 sendMessage(data) { if (this.globalData.socketStatus === 'connected'
) { const msg = JSON.stringify({ }) wx.sendSocketMessage({ data: msg }) } }, //
断线重连 reconnect() { let timer = null; if (this.globalData.socketStatus ===
'closed') { console.log("断线重连中......"); timer && clearTimeout(timer); timer =
setTimeout(() => { this.openScoket(); }, 500) } else { this.closeSocket(); } },
onHide() { // 断开websocket连接 this.closeSocket(); }, //app 全局属性监听 globalData: {
socketStatus: 'closed', callback: function () {} } })
callback函数在各页面中的应用方法
const app = getApp(); Page({ wacthWebsocket() { const that = this;
//这里需要注意this指向问题 app.globalData.callback = function (msg) { //这里写对msg进行处理的业务逻辑 }
}, })