本文实例为大家分享了微信小程序实现聊天对话功能的具体代码，供大家参考，具体内容如下

这是我实际项目线上的代码, 或许有些不足 || 和你的需求不符合。

上图:

to_news.wxml

<!--pages/index/to_news/to_news.wxml--><view class='tab'> <view class='lan'>{{tabdata.title}}</view> <view class='tent'> <text>{{tabdata.attribute_attribute}}</text> <text class='fl_r '>{{tabdata.num}}</text> </view> <view class='xiahuaxian1'></view> <view> <text class='fabu'>发布时间: {{tabdata.time_agree}}</text> </view></view><view class='news'> <view class='xiahuaxian1 xiahuaxia'></view> <view class='new_top_txt'>您正在与{{tabdata.nickname}}进行沟通</view> <view class="historycon"> <scroll-view scroll-y="true" scroll-top="{{scrollTop}}" class="history" wx:for="{{centendata}}" wx:key=''> <view> <text class='time'>{{item.time}}</text> </view> <block wx:if="{{item.is_show_right ==1}}"> <view class='my_right'> <view class='page_row'> <text wx:if='{{!item.is_img}}' class='new_txt'>{{item.content}}</text> <image wx:if='{{item.is_img}}' src='http://sz800800.cn/Uploads/{{item.content}}' class='new_imgtent'></image> <view wx:if='{{!item.is_img}}' class='sanjiao my'></view> <image class='new_img' wx:if='{{item.show_rignt == "是自己的内容，显示在右边，右边渲染 nickname_owner，head_owner"}}' src='{{item.head_owner}}'></image> <image class='new_img' wx:if='{{item.show_rignt == "是自己的内容，显示在右边，右边渲染 nickname_open，head_open"}}' src='{{item.head_open}}'></image> </view> </view> </block> <block wx:else> <view class='you_left'> <view class='page_row'> <image class='new_img' wx:if='{{item.show_rignt == "不是自己的内容，显示在左边，左边渲染 nickname_owner，head_owner"}}' src='{{item.head_owner}}'></image> <image class='new_img' wx:if='{{item.show_rignt == "不是自己的内容，显示在左边，左边渲染 nickname_open，head_open"}}' src='{{item.head_open}}'></image> <view wx:if='{{!item.is_img}}' class='sanjiao you'></view> <text wx:if='{{!item.is_img}}' class='new_txt'>{{item.content}}</text> <image wx:if='{{item.is_img}}' src='http://sz800800.cn/Uploads/{{item.content}}' class='new_imgtent'></image> </view> </view> </block> </scroll-view> </view></view><view class='hei' id="hei"></view><view class="sendmessage"> <input type="emoji" bindinput="bindChange" confirm-type="done" value='{{news_input_val}}' placeholder="" /> <button catchtap="add">发送</button> <input style='display:none' type="" bindinput="bindChange" confirm-type="done" placeholder="" /> <image bindtap="upimg1" class='jia_img' src='../../../images/jia_img.png'></image></view>

to_news.js

// pages/index/to_news/to_news.jsvar app = getApp();var util = require("../../../utils/util.js")var message = '';var text = '';var user = {};var length;var zx_info_id;var openid_talk;Page({ data: { news: '', scrollTop: 0, message: '', text: text, centendata: '', nickName: '', avatarUrl: '', news_input_val:'', tabdata: '' }, bindChange: function (e) { message = e.detail.value }, //事件处理函数 add: function (e) { var that = this var data = { program_id: app.jtappid, openid: app._openid, zx_info_id: zx_info_id, content: message, openid_talk:openid_talk } util.request('pg.php/ZXinfo/session_submit', 'post', data, '正在加载数据', function (res) { if (res.data.state == 1) { var a = true; that.loaddata(a); that.setData({ news_input_val:'' }) message = '' } else { wx.showToast({ title: '网络错误,请稍后', }) } }) }, onLoad: function (options) { openid_talk = options.openid_talk; zx_info_id = options.zx_info_id; console.log(openid_talk) //调用应用实例的方法获取全局数据 this.setData({ zx_info_id: zx_info_id, nickName: app.nickName, avatarUrl: app.avatarUrl, }); this.loaddata() }, // 页面加载 loaddata: function (a) { var that = this; var is_img = true; var data = { program_id: app.jtappid, openid: app._openid, zx_info_id: zx_info_id, openid_talk: openid_talk } util.request('pg.php/ZXinfo/session_page', 'post', data, '', function (res) { if (res.data.k1) { res.data.k1.time_agree = util.js_date_time(res.data.k1.time_agree) } for (var i = 0; i < res.data.k2.length; i++) { res.data.k2[i].time = util.js_date_time(res.data.k2[i].time) var n = res.data.k2[i].content.charAt(res.data.k2[i].content.length - 1); switch (n) { case 'g': res.data.k2[i].is_img = is_img break; default: } } that.setData({ tabdata: res.data.k1, centendata: res.data.k2.reverse() }) wx.setNavigationBarTitle({ title: that.data.tabdata.nickname }); if (a) { setTimeout(function () { that.bottom() }, 500); } }) setTimeout(function () { if (that.data.centendata.length != length) { length = that.data.centendata.length } that.loaddata() }, 3000); }, // 获取hei的id节点然后屏幕焦点调转到这个节点 bottom: function () { var query = wx.createSelectorQuery() query.select('#hei').boundingClientRect() query.selectViewport().scrollOffset() query.exec(function (res) { wx.pageScrollTo({ scrollTop: res[0].bottom // #the-id节点的下边界坐标 }) res[1].scrollTop // 显示区域的竖直滚动位置 }) }, // 选择图片并把图片保存 upimg1: function () { var that = this; wx.chooseImage({ success: function (res) { var data = { program_id: app.jtappid, openid: app._openid, zx_info_id: zx_info_id, } var tempFilePaths = res.tempFilePaths wx.uploadFile({ url: 'pg.php/ZXinfo/session_submit', //提交信息至后台 filePath: tempFilePaths[0], name: 'content', //文件对应的参数名字(key) formData: data, //其它的表单信息 success: function (res) { var a = true; that.loaddata(a); message = '' } }) } }) }})

to_news.wxss

page { background-color: #f7f7f7;} .tab { padding: 20rpx 20rpx 40rpx 50rpx; height: 20%; background-color: white;} .tab .tent { font-size: 33rpx; margin-bottom: 30rpx;}.jia_img{ height: 80rpx; width: 90rpx;}.new_imgtent{ height: 180rpx; width: 190rpx;}.tab .fabu { font-size: 33rpx; margin-top: 30rpx; margin-bottom: 30rpx;} .xiahuaxia { width: 80%; text-align: center; margin: 0 auto; position: relative; top: 60rpx;} .time { text-align: center; padding: 5rpx 20rpx 5rpx 20rpx; width: 200rpx; font-size: 26rpx; background-color: #E8E8E8;} .new_top_txt { width: 50%; position: relative; top: 38rpx; text-align: center; margin: 0 auto; font-size: 30rpx; color: #787878; background-color: #f7f7f7;} .news { margin-top: 30rpx; text-align: center; margin-bottom: 150rpx;} .img_null { height: 60rpx;} .l { height: 5rpx; width: 20%; margin-top: 30rpx; color: #000;} .my_right { float: right; position: relative; right: 40rpx;} .you_left { float: left; position: relative; left: 5rpx;} .new_img { width: 100rpx; height: 100rpx; border-radius: 50%;} .new_txt { width: 380rpx; border-radius: 7px; background-color: #95d4ff; padding: 0rpx 30rpx 0rpx 30rpx;} .sanjiao { top: 20rpx; position: relative; width: 0px; height: 0px; border-width: 10px; border-style: solid;} .my { border-color: transparent transparent transparent #95d4ff;} .you { border-color: transparent #95d4ff transparent transparent;} .sendmessage { background-color: white; width: 100%; position: fixed; bottom: 0rpx; display: flex; flex-direction: row;} .sendmessage input { width: 80%; height: 40px; background-color: white; line-height: 40px; font-size: 14px; border: 1px solid #d0d0d0; padding-left: 10px;} .sendmessage button { border: 1px solid white; width: 18%; height: 40px; background: #fff; color: #000; line-height: 40px; font-size: 14px;} .historycon { height: 90%; width: 100%; flex-direction: column; display: flex; margin-top: 100rpx; border-top: 0px;}.hei{ margin-top: 50px; height: 20rpx;}.history { height: 100%; margin-top: 15px; margin: 10px; font-size: 14px; line-height: 40px; word-break: break-all;}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。