微信小程序怎么实现聊天功能

这篇文章将为大家详细讲解有关微信小程序怎么实现聊天功能，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

初始化滚动条高度

var keyHeight = 0;

数据格式

const CHAT_DATA=[ {  type:0,//0客服1用户  content:'欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎欢迎',  headImg:'../../assets/common/images/headHortrait.jpeg',//头像  creatTime:'2019-01-01',//创建时间  contentType:'text' }, {  type: 0,//0客服1用户  content: '1111111',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'text' }, {  type: 1,//0客服1用户  content: '222222',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'text' }, {  type: 0,//0客服1用户  content: '333333',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'text' }, {  type: 1,//0客服1用户  content: '4444444',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'text', }, {  type: 0,//0客服1用户  content: 'http://tmp/wxc79c66d8b0ed19a8.o6zAJs6QE8L8FKq645ts4e3LoKzI.pGakaVHKmbQ3160aa57e2bf33cb576fbabf691cd890b.durationTime=3706.aac',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'voice',  duration: '3706', },{  type: 1,//0客服1用户  content: 'http://tmp/wxc79c66d8b0ed19a8.o6zAJs6QE8L8FKq645ts4e3LoKzI.pGakaVHKmbQ3160aa57e2bf33cb576fbabf691cd890b.durationTime=3706.aac',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'voice',  duration:'3706' }, {  type: 1,//0客服1用户  content: 'https://cache.yisu.com/upload/information/20201210/269/44185.jpg',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'img' }, {  type: 1,//0客服1用户  content: 'https://cache.yisu.com/upload/information/20201210/269/44185.jpg',  headImg: '../../assets/common/images/headHortrait.jpeg',//头像  creatTime: '2019-01-01',//创建时间  contentType: 'img' }];

wxml对话框

<block wx:key wx:for='{{chatData}}' wx:for-index="index">   <!-- 单个消息1 客服发出（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>   <!-- 单个消息2 用户发出（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底部输入框

<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'>按住请说话</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.jsconst { 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();/** * 初始化数据 *//** * 计算msg总高度 */function calScrollHeight(that, keyHeight) { var query = wx.createSelectorQuery(); query.select('.scrollMsg').boundingClientRect(function(rect) { }).exec();}Page({ /**  * 页面的初始数据  */ data: {  scrollHeight: '100vh',  inputVal:"",  inputBottom: 0,  chatData:[],  show:true,  showDailog:false,  bottomHeight:"18vw",  sendData:{},  pagination: {   pageSize: 5,   currentPage: 1,   total: 0,  },  showEmoji:false,  toastTitle:"录音中...." }, /**  * 生命周期函数--监听页面加载  */ 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(){//开始录音 const {show}=this.data  if (show){   this.setData({    show: false,   })  }else{   this.setData({    show: true,   })  } }, startTalk(e){//开始说话  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(){//停止说话  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) {    // 使页面滚动到底部    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){//播放语音  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: "录音中....",    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) {   // 使页面滚动到底部   wx.pageScrollTo({    scrollTop: rect.bottom + 5000   })  }).exec()  this.setData({   chatData,   scrollHeight: (windowHeight - 0) + 'px',   toView: 'msg-' + (chatData.length - 1),   inputBottom:'0px'  }) }, getEmoji(){//获取表情包  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {   // 使页面滚动到底部   wx.pageScrollTo({    scrollTop: rect.bottom + 5000   })  }).exec() this.setData({  showEmoji:true,  bottomHeight:"48vw" }) }, clickEmoji: function (e) {//选择表情包  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  }) }, /**  * 生命周期函数--监听页面显示  */ onShow: function () { }, /**  * 页面相关事件处理函数--监听用户下拉动作  */ onPullDownRefresh: function () {  let { pagination: { currentPage } } = this.data  this.getData({   param: CHAT_DATA,   pagination: {    pageSize: 5,    currentPage: currentPage + 1,   }  }); }, /**  * 页面上拉触底事件的处理函数  */ onReachBottom: function () { }, /**  * 获取聚焦  */ 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"  })  //计算msg高度  // calScrollHeight(this, keyHeight); }, //失去聚焦(软键盘消失) blur: function (e) {  const { chatData } = this.data  this.setData({   scrollHeight: '100vh',   inputBottom: 0  })  this.setData({   toView: 'msg-' + (chatData.length - 1)  }) }, /**  * 发送点击监听  */ sendClick: function (e) {  const { chatData, scrollHeight}=this.data;  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {   // 使页面滚动到底部   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:''  }); }, /**  * 退回上一页  */ toBackClick: function () {  wx.navigateBack({}) }})// pages/contact/contact.jsconst { 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();/** * 初始化数据 *//** * 计算msg总高度 */function calScrollHeight(that, keyHeight) { var query = wx.createSelectorQuery(); query.select('.scrollMsg').boundingClientRect(function(rect) { }).exec();}Page({ /**  * 页面的初始数据  */ data: {  scrollHeight: '100vh',  inputVal:"",  inputBottom: 0,  chatData:[],  show:true,  showDailog:false,  bottomHeight:"18vw",  sendData:{},  pagination: {   pageSize: 5,   currentPage: 1,   total: 0,  },  showEmoji:false,  toastTitle:"录音中...." }, /**  * 生命周期函数--监听页面加载  */ 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(){//开始录音 const {show}=this.data  if (show){   this.setData({    show: false,   })  }else{   this.setData({    show: true,   })  } }, startTalk(e){//开始说话  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(){//停止说话  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) {    // 使页面滚动到底部    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){//播放语音  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: "录音中....",    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) {   // 使页面滚动到底部   wx.pageScrollTo({    scrollTop: rect.bottom + 5000   })  }).exec()  this.setData({   chatData,   scrollHeight: (windowHeight - 0) + 'px',   toView: 'msg-' + (chatData.length - 1),   inputBottom:'0px'  }) }, getEmoji(){//获取表情包  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {   // 使页面滚动到底部   wx.pageScrollTo({    scrollTop: rect.bottom + 5000   })  }).exec() this.setData({  showEmoji:true,  bottomHeight:"48vw" }) }, clickEmoji: function (e) {//选择表情包  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  }) }, /**  * 生命周期函数--监听页面显示  */ onShow: function () { }, /**  * 页面相关事件处理函数--监听用户下拉动作  */ onPullDownRefresh: function () {  let { pagination: { currentPage } } = this.data  this.getData({   param: CHAT_DATA,   pagination: {    pageSize: 5,    currentPage: currentPage + 1,   }  }); }, /**  * 页面上拉触底事件的处理函数  */ onReachBottom: function () { }, /**  * 获取聚焦  */ 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"  })  //计算msg高度  // calScrollHeight(this, keyHeight); }, //失去聚焦(软键盘消失) blur: function (e) {  const { chatData } = this.data  this.setData({   scrollHeight: '100vh',   inputBottom: 0  })  this.setData({   toView: 'msg-' + (chatData.length - 1)  }) }, /**  * 发送点击监听  */ sendClick: function (e) {  const { chatData, scrollHeight}=this.data;  wx.createSelectorQuery().select('.content').boundingClientRect(function (rect) {   // 使页面滚动到底部   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:''  }); }, /**  * 退回上一页  */ toBackClick: function () {  wx.navigateBack({}) }})

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