[微信小程序]聊天对话(文本,图片)的功能(完整代码附效果图)

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正文：

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:

<pre class="has">
<code class="language-html">

{{tabdata.title}} {{tabdata.attribute_attribute}} {{tabdata.num}} 发布时间: {{tabdata.time_agree}} 您正在与{{tabdata.nickname}}进行沟通 {{item.time}} {{item.content}} {{item.content}}

<pre class="has">
<code class="language-javascript">// pages/index/to_news/to_news.js
var 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_talk: openid_talk
}
util.request('pg.PHP/ZXinfo/session_page','',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,}
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 = ''
}
})
}
})
}
})

<pre class="has">
<code class="language-css">/ pages/index/to_news/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;
}

/ 聊天内容 /

.news {
margin-top: 30rpx;
text-align: center;
margin-bottom: 150rpx;
}

.img_null {
height: 60rpx;
}

.l {
height: 5rpx;
width: 20%;
margin-top: 30rpx;
color: #000;
}

/ 聊天 /

.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;
}