// pages/index/to_news/to_news.js 
var app = getApp();
var socketOpen = false;
var SocketTask = false;
var url = 'ws://192.168.0.120:7011';
Page({
 data: {
 inputValue: '',
 returnValue: '',
 },
 onLoad: function (options) {
 },
 onReady: function () {
 // 創建Socket
 SocketTask = wx.connectSocket({
 url: url,
 data: 'data',
 header: {
 'content-type': 'application/json'
 },
 method: 'post',
 success: function (res) {
 console.log('WebSocket連接創建', res)
 },
 fail: function (err) {
 wx.showToast({
 title: '網絡異常！',
 })
 console.log(err)
 },
 })
 if (SocketTask) {
 SocketTask.onOpen(res => {
 console.log('監聽 WebSocket 連接打開事件。', res)
 })
 SocketTask.onClose(onClose => {
 console.log('監聽 WebSocket 連接關閉事件。', onClose)
 })
 SocketTask.onError(onError => {
 console.log('監聽 WebSocket 錯誤。錯誤信息', onError)
 })
 SocketTask.onMessage(onMessage => {
 console.log('監聽WebSocket接受到服務器的消息事件。服務器返回的消息', onMessage)
 })
 }
 },
 
 // 提交文字
 submitTo: function (e) {
 let that = this;
 that.data.allContentList.push({that.data.inputValue });
 that.setData({
 allContentList: that.data.allContentList
 })
 var data = {
 text: that.data.inputValue
 }
 if (socketOpen) {
 // 如果打開了socket就發送數據給服務器
 sendSocketMessage(data)
 }
 },
 bindKeyInput: function (e) {
 this.setData({
 inputValue: e.detail.value
 })
 },
 
 onHide: function () {
 SocketTask.close(function (close) {
 console.log('關閉 WebSocket 連接。', close)
 })
 },
})
 
//通過 WebSocket 連接發送數據，需要先 wx.connectSocket，并在 wx.onSocketOpen 回調之后才能發送。
function sendSocketMessage(data) {
 console.log('通過 WebSocket 連接發送數據')
 if (socketOpen) {
 SocketTask.send({data: JSON.stringify(data)
 }, function (res) {
 console.log('已發送', res)
 })
 } else {
 socketMsgQueue.push(msg)
 }
} 

<input type="text" bindinput="bindKeyInput" value='{{inputValue}}' placeholder="" />
<button bindtap="submitTo" class='user_input_text'>發送</button>