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微信小程序聊天功能的示例代碼

發(fā)布時間：2020-09-19 17:06:12 來源：腳本之家 閱讀：232 作者：lulu 欄目：web開發(fā)

效果

微信小程序聊天功能的示例代碼

初始化滾動條高度

var keyHeight = 0;

數(shù)據(jù)格式

const CHAT_DATA=[
 {
  type:0,//0客服1用戶
  content:'歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎歡迎',
  headImg:'../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime:'2019-01-01',//創(chuàng)建時間
  contentType:'text'
 }, {
  type: 0,//0客服1用戶
  content: '1111111',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'text'
 }, {
  type: 1,//0客服1用戶
  content: '222222',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'text'
 }, {
  type: 0,//0客服1用戶
  content: '333333',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'text'
 }, {
  type: 1,//0客服1用戶
  content: '4444444',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'text',
 }, {
  type: 0,//0客服1用戶
  content: 'http://tmp/wxc79c66d8b0ed19a8.o6zAJs6QE8L8FKq645ts4e3LoKzI.pGakaVHKmbQ3160aa57e2bf33cb576fbabf691cd890b.durationTime=3706.aac',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'voice',
  duration: '3706',
 },{
  type: 1,//0客服1用戶
  content: 'http://tmp/wxc79c66d8b0ed19a8.o6zAJs6QE8L8FKq645ts4e3LoKzI.pGakaVHKmbQ3160aa57e2bf33cb576fbabf691cd890b.durationTime=3706.aac',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'voice',
  duration:'3706'
 },
 {
  type: 1,//0客服1用戶
  content: 'https://img.yzcdn.cn/vant/cat.jpeg',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'img'
 }, {
  type: 1,//0客服1用戶
  content: 'https://img.yzcdn.cn/vant/cat.jpeg',
  headImg: '../../assets/common/images/headHortrait.jpeg',//頭像
  creatTime: '2019-01-01',//創(chuàng)建時間
  contentType: 'img'
 }
];

wxml對話框

<block wx:key wx:for='{{chatData}}' wx:for-index="index">

   <!-- 單個消息1 客服發(fā)出（左） -->
   <view wx:if='{{item.type==0}}' id='msg-{{index}}' class="contentLeft" style=''>
    <view class="head">
      <image class="headImg" src='{{item.headImg}}' mode='widthFix'></image>
    </view>
    <view class='leftMsg' wx:if="{{item.contentType==='text'}}">{{item.content}}</view>
    <view class='leftMsg' wx:if="{{item.contentType==='voice'}}" data-duration="{{item.content}}">{{item.duration}}s</view>
     
    <view class='leftMsg img' wx:if="{{item.contentType==='img'}}"><image src="{{item.content}}" data-src="{{item.content}}" mode='widthFix' bindtap="onPreview"/></view>
   </view>

   <!-- 單個消息2 用戶發(fā)出（右） -->
   <view wx:else id='msg-{{index}}' class="contentRight">
    <view class='rightMsg' wx:if="{{item.contentType==='voice'}}" data-duration="{{item.duration}}" bindtap="playRecord" >{{item.duration}}"<van-icon name="../../../assets/common/icon/voice-r.png"  /></view>
    <view class='rightMsg' wx:if="{{item.contentType==='text'}}">{{item.content}}</view>
    
    <view class='rightMsg img' wx:if="{{item.contentType==='img'}}"><image src="{{item.content}}" data-src="{{item.content}}" mode='widthFix' bindtap="onPreview"/></view>
     <view>
      <image class="headImg" src='{{item.headImg}}' mode='widthFix'></image>
    </view>
   </view>

  </block>

wxml底部輸入框

<view class='inputRoom' style='bottom: {{inputBottom}};height: {{bottomHeight}}'>
  <van-row class="bottomRow">
   <van-col span="2"wx:if="{{show}}"> <van-icon bindtap="startRecord" class="iconfont icon" class-prefix='icon' size="40rpx" name="yuyin" ></van-icon></van-col>
    <van-col span="2" wx:if="{{!show}}"> <van-icon bindtap="startRecord" class="iconfont icon" class-prefix='icon' size="40rpx" name="fabiaowenzhang" ></van-icon></van-col>
   <van-col span="18" wx:if="{{show}}"> <input bindconfirm='sendClick'bind:input="inputValue" adjust-position='{{false}}' value='{{inputVal}}' confirm-type='send' bindfocus='focus' bindblur='blur'></input></van-col>
   <van-col span="18" wx:if="{{!show}}"> <view class="holdTape" bind:touchstart="startTalk" bind:touchend='stopRecord'>按住請說話</view></van-col>
   <van-col span="2"><van-icon class="iconfont icon" class-prefix='icon' size="40rpx" name='biaoqing' bindtap="getEmoji"></van-icon></van-col>
   <van-col span="2"><van-uploader use-slot accept='image' bind:after-read="uploadeImg"> <van-icon class="iconfont icon" class-prefix='icon' size="40rpx" name='icon02' ></van-icon></van-uploader></van-col>
  </van-row> 
   <view wx:if="{{showEmoji}}" class="emoji">
   <emoji bind:clickEmoji="clickEmoji" data-key="inputVal" value="{{inputVal}}" />
  </view>
 </view>
  
</view>
<view class="recordDailog" wx:if="{{showDailog}}"  >
<view class="show">
 <image src="../../assets/common/images/record.png"></image>
 <text>{{toastTitle}}</text>
</view>

css

#page{
 height: 90%;
overflow-y: auto;

}
.content{
 background: white;

}

.inputRoom {
 width: 100vw;
 /* height: 16vw; */
 border-top: 1px solid #cdcdcd;
 position: fixed;
 bottom: 0;
 display: flex;
 align-items: center;
 z-index: 20;
 background: white;
 flex-direction: column;

}
.bottomRow{
 width: 100%;
 height: 16vw;
display: flex;
align-items: center;
flex-direction: row
}
.bottomRow .van-row{
 width: 100%;

}
.emoji{
 height: 30vw;
}
input {
width: 90%;
height: 9.33vw;
background-color: #EEF4FA;
border-radius: 6rpx;
font-size: 28rpx;
color: #444;
padding: 0 3%;
margin-left: 2%;
}

.leftMsg {
 font-size: 26rpx;
 color: #333333;
line-height: 6vw;
padding: 2vw 2.5vw;
background-color: #EEF4FA;
 border-radius: 10rpx;
 z-index: 10;
}

.rightMsg {
 font-size: 26rpx;
 color: white;
 line-height: 6vw;
 padding: 2vw 2.5vw;
 background-color: #496DFF;
 border-radius: 10rpx;
 z-index: 10;
}



.chatFrame{
 background: white;
 height: 100%
} 
.icon{
 line-height: 8vw;

}
.head{
 display: flex;
 align-items: center
}
.headImg{
 border-radius: 50%; width: 60rpx;height: 60rpx;
}
.holdTape{
 width: 90%;
height: 9.33vw;
background-color: #EEF4FA;
border-radius: 6rpx;
padding: 0 3%;
margin-left: 2%;
display: flex;
align-items: center;
justify-content: center;

}

.recordDailog{
 -webkit-transition-duration: 300ms;
transition-duration: 300ms;
z-index: 1000;
position: fixed;
top: 50%;
left: 50%;
width: -webkit-fit-content;
width: fit-content;
-webkit-transform: translate(-50%,-50%);
transform: translate(-50%,-50%);
max-width: var(--toast-max-width,70%);

}

.show{
width: var(--toast-default-width,90px);
min-height: var(--toast-default-min-height,90px);
padding: var(--toast-default-padding,16px);
display: flex;
-webkit-flex-direction: column;
flex-direction: column;
-webkit-align-items: center;
align-items: center;
-webkit-justify-content: center;
justify-content: center;
box-sizing: initial;
color: var(--toast-text-color,#fff);
font-size: var(--toast-font-size,14px);
line-height: var(--toast-line-height,20px);
white-space: pre-wrap;
word-wrap: break-word;
background-color: var(--toast-background-color,rgba(50,50,51,.88));
border-radius: var(--toast-border-radius,4px);

}
.show image{
 width: 24px;
 height: 24px
}
image{
 /* max-width: 88vw;
max-height: 400rpx; */
width: 100%
}
.img{
background: none;
width: 90%
}
.contentRight{
 display: flex; justify-content: flex-end; padding: 2vw 2vw 2vw 11vw;width: 86%;
}
.contentLeft{
 display: flex; padding: 2vw 11vw 2vw 2vw;width: 86%;
}

js

// pages/contact/contact.js
const {
 pageFunc
} = require('../../utils/util.js');
const app = getApp();
var windowWidth = wx.getSystemInfoSync().windowWidth;
var windowHeight = wx.getSystemInfoSync().windowHeight;
var keyHeight = 0;
const { CHAT_DATA}=require("../../data/customerService.js");
import Toast from '../../components/vant/toast/toast';
const recorderManager = wx.getRecorderManager();
const innerAudioContext = wx.createInnerAudioContext();
const db = wx.cloud.database();
/**
 * 初始化數(shù)據(jù)
 */
/**
 * 計算msg總高度
 */
function calScrollHeight(that, keyHeight) {
 var query = wx.createSelectorQuery();
 query.select('.scrollMsg').boundingClientRect(function(rect) {
 }).exec();
}
Page({

 /**
  * 頁面的初始數(shù)據(jù)
  */
 data: {
  scrollHeight: '100vh',
  inputVal:"",
  inputBottom: 0,
  chatData:[],
  show:true,
  showDailog:false,
  bottomHeight:"18vw",
  sendData:{},
  pagination: {
   pageSize: 5,
   currentPage: 1,
   total: 0,
  },
  showEmoji:false,
  toastTitle:"錄音中...."
 },

 /**
  * 生命周期函數(shù)--監(jiān)聽頁面加載
  */
 onLoad: function (options) {
  // this.setData({
  //  cusHeadIcon: app.globalData.userInfo.avatarUrl,
  // });
  const {
   pagination
  } = this.data
  this.getData({ param: CHAT_DATA, pagination });
   wx.pageScrollTo({
    scrollTop: 1000
   })
 },
 getData(params) {
  const { chatData } = this.data;
  const {
   param,
   pagination: {
    pageSize = 10,
    currentPage = 1
   },
  } = params;
  this.setData({
   pagination: { pageSize, currentPage }
  });
  const {
   data,
   pagination
  } = pageFunc(param, currentPage, pageSize);
  data.forEach((item) => {
   if (item.duration) {
    item.duration = Math.ceil(item.duration / 1000)
   }
  });
   this.setData({
    'chatData': data.concat(chatData)
   });
 },
 startRecord(){//開始錄音
 const {show}=this.data
  if (show){
   this.setData({
    show: false,
   })
  }else{
   this.setData({
    show: true,
   })
  }
  
  
 },
 startTalk(e){//開始說話
  this.setData({
   showDailog:true,
  })
  const options = {
   duration: 60000,
   sampleRate: 44100,
   numberOfChannels: 1,
   encodeBitRate: 192000,
   format: 'aac',
   frameSize: 50
  }
  recorderManager.start(options)
  recorderManager.onStart((res) => {
  })
 },
 stopRecord(){//停止說話
  const that=this
  this.setData({
   showDailog:false,
  })
  recorderManager.stop();
  recorderManager.onStop((res) => {
   const { sendData, chatData } = that.data;
   let { tempFilePath, duration, fileSize} = res
   sendData.tempFilePathData=res
   duration = Math.ceil(duration / 1000)
   const data = { content: tempFilePath, duration , fileSize, contentType: 'voice', type: 1};
   chatData.push(data);
   wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
    // 使頁面滾動到底部
    wx.pageScrollTo({
     scrollTop: rect.bottom + 5000
    })
   }).exec();
   that.setData({
    'tempFilePath': tempFilePath,
    sendData,
    chatData,
    scrollHeight: (windowHeight - 0) + 'px',
    toView: 'msg-' + (chatData.length - 1),
    inputBottom: '0px'
   })
  })
 },

 playRecord(e){//播放語音
  const { currentTarget: { dataset: { duration } }}=e;
  const { tempFilePath} = this.data
  innerAudioContext.autoplay = true;
  innerAudioContext.src = tempFilePath ,
   innerAudioContext.onPlay(() => {
    this.setData({
     toastTitle: "播放中....",
     showDailog: true,
    })
   })
  innerAudioContext.onEnded((res) => {
   this.setData({
    toastTitle: "錄音中....",
    showDailog: false,
   })
  })
  innerAudioContext.onError((res) => {
  });
  innerAudioContext.play()
 },

 uploadeImg(e){
  const { file: { path,size:fileSize} } = e.detail;
  const { chatData } = this.data;
  const data = { content: path, fileSize, contentType: 'img', type: 1 };
  chatData.push(data);
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
  this.setData({
   chatData,
   scrollHeight: (windowHeight - 0) + 'px',
   toView: 'msg-' + (chatData.length - 1),
   inputBottom:'0px'
  })
 },
 getEmoji(){//獲取表情包
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
 this.setData({
  showEmoji:true,
  bottomHeight:"48vw"
 })
 },

 clickEmoji: function (e) {//選擇表情包
  const {
   detail: {
    value
   },
   currentTarget: {
    dataset: {
     key
    }
   }
  } = e;
  this.setData({
   [key]: value
  })
 },

 onPreview(e){
  const {
   currentTarget: {
    dataset: {
     src
    }
   }
  } = e;
  const urls = [src]
  wx.previewImage({
   current: src,
   urls
  })
 },
 /**
  * 生命周期函數(shù)--監(jiān)聽頁面顯示
  */
 onShow: function () {

 },

 /**
  * 頁面相關(guān)事件處理函數(shù)--監(jiān)聽用戶下拉動作
  */
 onPullDownRefresh: function () {
  let { pagination: { currentPage } } = this.data
  this.getData({
   param: CHAT_DATA,
   pagination: {
    pageSize: 5,
    currentPage: currentPage + 1,
   }
  });
 },

 /**
  * 頁面上拉觸底事件的處理函數(shù)
  */
 onReachBottom: function () {

 },

 /**
  * 獲取聚焦
  */
 inputValue(e){
  const {detail:{value}}=e
  this.setData({
   inputVal:value
  })
 },
 focus: function (e) {
  const { chatData}=this.data
  keyHeight = e.detail.height;
  wx.pageScrollTo({
   scrollTop: windowHeight - keyHeight
  })
  this.setData({
   toView: 'msg-' + (chatData.length - 1),
   inputBottom: keyHeight + 'px',
   scrollHeight: (windowHeight - keyHeight) + 'px',
   showEmoji:false,
   bottomHeight: "18vw"
  })
  //計算msg高度
  // calScrollHeight(this, keyHeight);

 },

 //失去聚焦(軟鍵盤消失)
 blur: function (e) {
  const { chatData } = this.data
  this.setData({
   scrollHeight: '100vh',
   inputBottom: 0
  })
  this.setData({
   toView: 'msg-' + (chatData.length - 1)
  })

 },

 /**
  * 發(fā)送點擊監(jiān)聽
  */
 sendClick: function (e) {
  const { chatData, scrollHeight}=this.data;
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
 
  chatData.push({
   type: 1,
   contentType: 'text',
   content: e.detail.value,
   headImg: '../../assets/common/images/headHortrait.jpeg',
  })
  this.setData({
   chatData,
   inputVal:''
  });


 },

 /**
  * 退回上一頁
  */
 toBackClick: function () {
  wx.navigateBack({})
 }

})// pages/contact/contact.js
const {
 pageFunc
} = require('../../utils/util.js');
const app = getApp();
var windowWidth = wx.getSystemInfoSync().windowWidth;
var windowHeight = wx.getSystemInfoSync().windowHeight;
var keyHeight = 0;
const { CHAT_DATA}=require("../../data/customerService.js");
import Toast from '../../components/vant/toast/toast';
const recorderManager = wx.getRecorderManager();
const innerAudioContext = wx.createInnerAudioContext();
const db = wx.cloud.database();
/**
 * 初始化數(shù)據(jù)
 */
/**
 * 計算msg總高度
 */
function calScrollHeight(that, keyHeight) {
 var query = wx.createSelectorQuery();
 query.select('.scrollMsg').boundingClientRect(function(rect) {
 }).exec();
}
Page({

 /**
  * 頁面的初始數(shù)據(jù)
  */
 data: {
  scrollHeight: '100vh',
  inputVal:"",
  inputBottom: 0,
  chatData:[],
  show:true,
  showDailog:false,
  bottomHeight:"18vw",
  sendData:{},
  pagination: {
   pageSize: 5,
   currentPage: 1,
   total: 0,
  },
  showEmoji:false,
  toastTitle:"錄音中...."
 },

 /**
  * 生命周期函數(shù)--監(jiān)聽頁面加載
  */
 onLoad: function (options) {
  // this.setData({
  //  cusHeadIcon: app.globalData.userInfo.avatarUrl,
  // });
  const {
   pagination
  } = this.data
  this.getData({ param: CHAT_DATA, pagination });
   wx.pageScrollTo({
    scrollTop: 1000
   })
 },
 getData(params) {
  const { chatData } = this.data;
  const {
   param,
   pagination: {
    pageSize = 10,
    currentPage = 1
   },
  } = params;
  this.setData({
   pagination: { pageSize, currentPage }
  });
  const {
   data,
   pagination
  } = pageFunc(param, currentPage, pageSize);
  data.forEach((item) => {
   if (item.duration) {
    item.duration = Math.ceil(item.duration / 1000)
   }
  });
   this.setData({
    'chatData': data.concat(chatData)
   });
 },
 startRecord(){//開始錄音
 const {show}=this.data
  if (show){
   this.setData({
    show: false,
   })
  }else{
   this.setData({
    show: true,
   })
  }
  
  
 },
 startTalk(e){//開始說話
  this.setData({
   showDailog:true,
  })
  const options = {
   duration: 60000,
   sampleRate: 44100,
   numberOfChannels: 1,
   encodeBitRate: 192000,
   format: 'aac',
   frameSize: 50
  }
  recorderManager.start(options)
  recorderManager.onStart((res) => {
  })
 },
 stopRecord(){//停止說話
  const that=this
  this.setData({
   showDailog:false,
  })
  recorderManager.stop();
  recorderManager.onStop((res) => {
   const { sendData, chatData } = that.data;
   let { tempFilePath, duration, fileSize} = res
   sendData.tempFilePathData=res
   duration = Math.ceil(duration / 1000)
   const data = { content: tempFilePath, duration , fileSize, contentType: 'voice', type: 1};
   chatData.push(data);
   wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
    // 使頁面滾動到底部
    wx.pageScrollTo({
     scrollTop: rect.bottom + 5000
    })
   }).exec();
   that.setData({
    'tempFilePath': tempFilePath,
    sendData,
    chatData,
    scrollHeight: (windowHeight - 0) + 'px',
    toView: 'msg-' + (chatData.length - 1),
    inputBottom: '0px'
   })
  })
 },

 playRecord(e){//播放語音
  const { currentTarget: { dataset: { duration } }}=e;
  const { tempFilePath} = this.data
  innerAudioContext.autoplay = true;
  innerAudioContext.src = tempFilePath ,
   innerAudioContext.onPlay(() => {
    this.setData({
     toastTitle: "播放中....",
     showDailog: true,
    })
   })
  innerAudioContext.onEnded((res) => {
   this.setData({
    toastTitle: "錄音中....",
    showDailog: false,
   })
  })
  innerAudioContext.onError((res) => {
  });
  innerAudioContext.play()
 },

 uploadeImg(e){
  const { file: { path,size:fileSize} } = e.detail;
  const { chatData } = this.data;
  const data = { content: path, fileSize, contentType: 'img', type: 1 };
  chatData.push(data);
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
  this.setData({
   chatData,
   scrollHeight: (windowHeight - 0) + 'px',
   toView: 'msg-' + (chatData.length - 1),
   inputBottom:'0px'
  })
 },
 getEmoji(){//獲取表情包
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
 this.setData({
  showEmoji:true,
  bottomHeight:"48vw"
 })
 },

 clickEmoji: function (e) {//選擇表情包
  const {
   detail: {
    value
   },
   currentTarget: {
    dataset: {
     key
    }
   }
  } = e;
  this.setData({
   [key]: value
  })
 },

 onPreview(e){
  const {
   currentTarget: {
    dataset: {
     src
    }
   }
  } = e;
  const urls = [src]
  wx.previewImage({
   current: src,
   urls
  })
 },
 /**
  * 生命周期函數(shù)--監(jiān)聽頁面顯示
  */
 onShow: function () {

 },

 /**
  * 頁面相關(guān)事件處理函數(shù)--監(jiān)聽用戶下拉動作
  */
 onPullDownRefresh: function () {
  let { pagination: { currentPage } } = this.data
  this.getData({
   param: CHAT_DATA,
   pagination: {
    pageSize: 5,
    currentPage: currentPage + 1,
   }
  });
 },

 /**
  * 頁面上拉觸底事件的處理函數(shù)
  */
 onReachBottom: function () {

 },

 /**
  * 獲取聚焦
  */
 inputValue(e){
  const {detail:{value}}=e
  this.setData({
   inputVal:value
  })
 },
 focus: function (e) {
  const { chatData}=this.data
  keyHeight = e.detail.height;
  wx.pageScrollTo({
   scrollTop: windowHeight - keyHeight
  })
  this.setData({
   toView: 'msg-' + (chatData.length - 1),
   inputBottom: keyHeight + 'px',
   scrollHeight: (windowHeight - keyHeight) + 'px',
   showEmoji:false,
   bottomHeight: "18vw"
  })
  //計算msg高度
  // calScrollHeight(this, keyHeight);

 },

 //失去聚焦(軟鍵盤消失)
 blur: function (e) {
  const { chatData } = this.data
  this.setData({
   scrollHeight: '100vh',
   inputBottom: 0
  })
  this.setData({
   toView: 'msg-' + (chatData.length - 1)
  })

 },

 /**
  * 發(fā)送點擊監(jiān)聽
  */
 sendClick: function (e) {
  const { chatData, scrollHeight}=this.data;
  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {
   // 使頁面滾動到底部
   wx.pageScrollTo({
    scrollTop: rect.bottom + 5000
   })
  }).exec()
 
  chatData.push({
   type: 1,
   contentType: 'text',
   content: e.detail.value,
   headImg: '../../assets/common/images/headHortrait.jpeg',
  })
  this.setData({
   chatData,
   inputVal:''
  });


 },

 /**
  * 退回上一頁
  */
 toBackClick: function () {
  wx.navigateBack({})
 }

})

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