uni-app聊天室|vue+uniapp仿微信聊天实例|uniapp仿微信App界面

来源：cnblogs　　作者：xiaoyan2017　　时间：2019/10/10 8:51:24　　对本文有异议

一、介绍

运用UniApp+Vue+Vuex+swiper+uniPop等技术开发的仿微信原生App聊天室|仿微信聊天界面实例项目uniapp-chatroom，实现了发送图文消息、表情(gif图)，图片预览、地图位置、长按菜单、红包/钱包、仿微信朋友圈等功能。

二、测试效果

H5 + 小程序 + App端测试效果如下，实测多端效果均为一致。(后续大图统一展示App端)

二、技术选型

编辑器：HBuilder X
技术框架：uni-app + vue
状态管理：Vuex
iconfont图标：阿里字体图标库
自定义导航栏 + 底部Tabbar
弹窗组件：uniPop（基于uni-app封装模态弹窗）
测试环境：H5端 + 小程序 + App端（三端均兼容）
高德地图：vue-amap

◆ 顶部导航栏headerBar

顶部导航栏采用的是自定义模式，具体可参看这篇文章：uni-app自定义导航栏按钮|uniapp仿微信顶部导航条

在pages.json里面配置globalStyle，将navigationStyle设为custom时，原生顶部导航栏不显示，这时就能自定义导航栏

"globalStyle": {"navigationStyle": "custom"}

◆ 引入公共样式/组件及全局弹窗

import Vue from 'vue'
import App from './App'
 
// >>>引入css
import './assets/fonts/iconfont.css'
import './assets/css/reset.css'
import './assets/css/layout.css'
 
// >>>引入状态管理
import store from './store'
Vue.prototype.$store = store
// >>>引入公共组件
import headerBar from './components/header/header.vue'
import tabBar from './components/tabbar/tabbar.vue'
import popupWindow from './components/popupWindow.vue'
Vue.component('header-bar', headerBar)
Vue.component('tab-bar', tabBar)
Vue.component('popup-window', popupWindow)
// >>>引入uniPop弹窗组件
import uniPop from './components/uniPop/uniPop.vue'
Vue.component('uni-pop', uniPop)
Vue.config.productionTip = false
App.mpType = 'app'
const app = new Vue({
    ...App
})
app.$mount()

◆ Vuex + uniapp登录验证

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
export default new Vuex.Store({
    state: {
        user: uni.getStorageSync('user'),
        token: uni.getStorageSync('token'),
    },
    mutations: {
        // 存储token
        SET_TOKEN(state, data) {
            state.token = data
            uni.setStorageSync('token', data)
        },
        // 存储用户名
        SET_USER(state, data) {
            state.user = data
            uni.setStorageSync('user', data)
        },
        ...
    },
})

<script>
    import { mapState, mapMutations } from 'vuex'
    import util from '../../utils/util.js'
    
    export default {
        data() {
            return {
                formObj: {},
            }
        },
        computed: {
            ...mapState(['user', 'token'])
        },
        mounted() {
            // 判断是否有登录
            if(this.user){
                uni.redirectTo({url: '/pages/index/index'})
            }
        },
        methods: {
            // 提交表单
            handleSubmit(e) {
                ...
            }
        }
    }
</script>

◆ 仿微信朋友圈透明导航栏

通过onPageScroll函数实现自定义导航上下滑动自动调整导航栏的透明度，滑动到距离顶部200 效果如下图二

/**
 * @tpl 朋友圈模板
 */
 
<template>
    <view class="flexbox flex_col">
        <header-bar :isBack="true" title="朋友圈" :bgColor="{background: headerBarBackground}" transparent>
            <text slot="back" class="uni_btnIco iconfont icon-arrL"></text>
            <text slot="iconfont" class="uni_btnIco iconfont icon-publish mr_5" @tap="handlePublish"></text>
        </header-bar>
        
        <view class="uni__scrollview flex1">
            <view class="uni-friendZone">
                ...
            </view>
        </view>
    </view>
</template>
 
<script>
    export default {
        data() {
            return {
                headerBarBackground: 'transparent'
            }
        },
        onPageScroll : function(e) {
            // console.log("滚动距离为：" + e.scrollTop);
            this.headerBarBackground = 'rgba(65,168,99,'+e.scrollTop / 200+')'
        },
        methods: {
            ...
        }
    }
</script>
 
<style scoped>
 
</style>

◆ uniapp实现聊天页面滚动至底部

在h5端将聊天页面滚动到底部很好实现，小程序中通过设置scroll-view属性scroll-into-view的值也能实现，可是在uni-app里面怎么将聊天信息滚动至底部呢？

uni-app通过判断聊天内容高度和scroll-view高度的大小设置滚动距离

<scroll-view id="scrollview" scroll-y="true" :scroll-top="scrollTop" style="height: 100%;">
    <view class="uni-chatMsgCnt" id="msglistview">
        <view class="msgitem">xxx</view>
        <view class="msgitem">xxx</view>
        <view class="msgitem">xxx</view>
        ...
    </view>
</scroll-view>

export default {
    data() {
        return {
            scrollTop: 0,
            ...
        }
    },
    mounted() {
        this.scrollToBottom()
    },
    updated() {
        this.scrollToBottom()
    },
    methods: {
        // 滚动至聊天底部
        scrollToBottom(t) {
            let that = this
            let query = uni.createSelectorQuery()
            query.select('#scrollview').boundingClientRect()
            query.select('#msglistview').boundingClientRect()
            query.exec((res) => {
                // console.log(res)
                if(res[1].height > res[0].height){
                    that.scrollTop = res[1].height - res[0].height
                }
            })
        },
        ...
    }
}

◆ uniapp聊天代码片段

<script>
    const emotionJson = require('./mock-emotion.js')
    const messageJson = require('./mock-chat.js')
    
    export default {
        data() {
            return {
                scrollTop: 0,
                
                showFootToolbar: false,
                showEmotionChoose: false,
                
                editorText: '',
                editorLastCursor: null,
                
                // 表情json
                emotionList: emotionJson,
                
                // 消息记录
                messageList: messageJson,
                
                // 预览图片临时数组
                previewImgArray: [],
            }
        },
        mounted() {
            this.scrollToBottom()
        },
        updated() {
            this.scrollToBottom()
        },
        methods: {
            // 滚动至聊天底部
            scrollToBottom(t) {
                let that = this
                let query = uni.createSelectorQuery()
                query.select('#scrollview').boundingClientRect()
                query.select('#msglistview').boundingClientRect()
                query.exec((res) => {
                    // console.log(res)
                    if(res[1].height > res[0].height){
                        that.scrollTop = res[1].height - res[0].height
                    }
                })
            },
            
            // 点击聊天消息区域
            msgPanelTaped() {
                if(!this.showFootToolbar) return
                this.showFootToolbar = false
            },
            
            // 表情、选择区切换
            swtEmotionChooseView(bool) {
                this.showFootToolbar = true
                this.showEmotionChoose = bool
            },
            
            ...
            
            // 点击表情
            handleEmotionTaped(emoj) {
                if(emoj == 'del') return
                // 在光标处插入表情
                let startStr = this.editorText.substr(0, this.editorLastCursor)
                let endStr = this.editorText.substr(this.editorLastCursor)
                this.editorText = startStr + `${emoj}` + endStr
            },
            
            
            // >>> 【选择区功能模块】------------------------------------------
            // 选择图片
            handleLaunchImage() {
                let that = this
                let msglist = this.messageList
                let len = msglist.length
                // 消息队列
                let data = {
                    id: `msg${++len}`,
                    msgtype: 5,
                    isme: true,
                    avator: '/static/uimg/u__chat_img1.jpg',
                    author: 'King',
                    msg: '',
                    imgsrc: '',
                    videosrc: ''
                }
                
                uni.chooseImage({
                    count: 1,
                    sourceType: ['album'],
                    success: function(res){
                        // console.log(res)
                        // console.log(res.tempFilePaths)
                        data.imgsrc = res.tempFilePaths.toString()
                        msglist = msglist.concat(data)
                        that.messageList = msglist
                    }
                })
            },
            
            ...
            
            // 位置
            handleChooseLocation() {
                let that = this
                let msglist = this.messageList
                let len = msglist.length
                // 消息队列
                let data = {
                    id: `msg${++len}`,
                    msgtype: 8,
                    isme: true,
                    avator: '/static/uimg/u__chat_img1.jpg',
                    author: 'King',
                    msg: '',
                    imgsrc: '',
                    videosrc: ''
                }
                
                uni.chooseLocation({
                    success: (res) => {
                        console.log(res)
                        // 插入消息
                        data.msg = {
                            name: res.name,
                            address: res.address,
                            latitude: res.latitude,
                            longitude: res.longitude
                        }
                        msglist = msglist.concat(data)
                        that.messageList = msglist
                    }
                })
            },
            
        }
    }
</script>