react-native聊天室|RN版聊天App仿微信实例|RN仿微信界面

Posted 2022-09-17 xiaoyan2017

一、前言

9月，又到开学的季节。为每个一直默默努力的自己点赞！最近都沉浸在react native原生app开发中，之前也有使用vue/react/angular等技术开发过聊天室项目，另外还使用RN技术做了个自定义模态弹窗rnPop组件。

一、项目简述

基于react+react-native+react-navigation+react-redux+react-native-swiper+rnPop等技术开发的仿微信原生App界面聊天室——RN_ChatRoom，实现了原生app启动页、AsyncStorage本地存储登录拦截、集成rnPop模态框功能(仿微信popupWindow弹窗菜单)、消息触摸列表、发送消息、表情(动图)，图片预览，拍摄图片、发红包、仿微信朋友圈等功能。

二、技术点

• MVVM框架：react / react-native / react-native-cli
• 状态管理：react-redux / redux
• 页面导航：react-navigation
• rn弹窗组件：rnPop
• 打包工具：webpack 2.0
• 轮播组件：react-native-swiper
• 图片/相册：react-native-image-picker

  "name": "RN_ChatRoom",
  "version": "0.0.1",
  "aboutMe": "QQ：282310962 、 wx：xy190310",
  "dependencies": 
    "react": "16.8.6",
    "react-native": "0.60.4"
  ,
  "devDependencies": 
    "@babel/core": "^7.5.5",
    "@babel/runtime": "^7.5.5",
    "@react-native-community/async-storage": "^1.6.1",
    "@react-native-community/eslint-config": "^0.0.5",
    "babel-jest": "^24.8.0",
    "eslint": "^6.1.0",
    "jest": "^24.8.0",
    "metro-react-native-babel-preset": "^0.55.0",
    "react-native-gesture-handler": "^1.3.0",
    "react-native-image-picker": "^1.0.2",
    "react-native-swiper": "^1.5.14",
    "react-navigation": "^3.11.1",
    "react-redux": "^7.1.0",
    "react-test-renderer": "16.8.6",
    "redux": "^4.0.4",
    "redux-thunk": "^2.3.0"
  ,
  "jest": 
    "preset": "react-native"
  

◆ App全屏幕启动页splash模板

react-native如何全屏启动？ 设置StatusBar顶部条背景为透明 translucent=true，并配合RN动画Animated

/**
 * @desc 启动页面
 */

import React,  Component  from ‘react‘
import  StatusBar, Animated, View, Text, Image  from ‘react-native‘

export default class Splash extends Component
    constructor(props)
        super(props)
        this.state = 
            animFadeIn: new Animated.Value(0),
            animFadeOut: new Animated.Value(1),
        
    

    render()
        return (
            <Animated.View style=[GStyle.flex1DC_a_j, backgroundColor: ‘#1a4065‘, opacity: this.state.animFadeOut]>
                <StatusBar backgroundColor=‘transparent‘ barStyle=‘light-content‘ translucent=true />

                <View style=GStyle.flex1_a_j>
                    <Image source=require(‘../assets/img/ic_default.jpg‘) style=borderRadius: 100, width: 100, height: 100 />
                </View>
                <View style=[GStyle.align_c, paddingVertical: 20]>
                    <Text style=color: ‘#dbdbdb‘, fontSize: 12, textAlign: ‘center‘,>RN-ChatRoom v1.0.0</Text>
                </View>
            </Animated.View>
        )
    

    componentDidMount()
        // 判断是否登录
        storage.get(‘hasLogin‘, (err, object) => 
            setTimeout(() => 
                Animated.timing(
                    this.state.animFadeOut, duration: 300, toValue: 0
                ).start(()=>
                    // 跳转页面
                    util.navigationReset(this.props.navigation, (!err && object && object.hasLogin) ? ‘Index‘ : ‘Login‘)
                )
            , 1500);
        )
    

◆ RN本地存储技术async-storage

/**
 * @desc 本地存储函数
 */

import AsyncStorage from ‘@react-native-community/async-storage‘

export default class Storage
    static get(key, callback)
        return AsyncStorage.getItem(key, (err, object) => 
            callback(err, JSON.parse(object))
        )
    

    static set(key, data, callback)
        return AsyncStorage.setItem(key, JSON.stringify(data), callback)
    

    static del(key)
        return AsyncStorage.removeItem(key)
    

    static clear()
        AsyncStorage.clear()
    


global.storage = Storage

声明全局global变量，只需在App.js页面一次引入、多个页面均可调用。

storage.set(‘hasLogin‘, hasLogin: true )
storage.get(‘hasLogin‘, (err, object) => ... )

◆ App主页面模板及全局引入组件

import React,  Fragment, Component  from ‘react‘
import  StatusBar  from ‘react-native‘

// 引入公共js
import ‘./src/utils/util‘
import ‘./src/utils/storage‘

// 导入样式
import ‘./src/assets/css/common‘
// 导入rnPop弹窗
import ‘./src/assets/js/rnPop/rnPop.js‘

// 引入页面路由
import PageRouter from ‘./src/router‘

class App extends Component
  render()
    return (
      <Fragment>
        /* <StatusBar backgroundColor=GStyle.headerBackgroundColor barStyle=‘light-content‘ /> */

        /* 页面 */
        <PageRouter />

        /* 弹窗模板 */
        <RNPop />
      </Fragment>
    )
  


export default App

◆ react-navigation页面导航器/地址路由、底部tabbar

由于react-navigation官方顶部导航器不能满足需求，如是自己封装了一个，功能效果有些类似微信导航。

export default class HeaderBar extends Component 
    constructor(props)
        super(props)
        this.state = 
            searchInput: ‘‘
        
    

    render() 
        /**
         * 更新
         * @param  navigation | 页面导航 
         * @param  title | 标题 
         * @param  center | 标题是否居中 
         * @param  search | 是否显示搜索 
         * @param  headerRight | 右侧Icon按钮 
         */
        let navigation, title, bg, center, search, headerRight  = this.props

        return (
            <View style=GStyle.flex_col>
                <StatusBar backgroundColor=bg ? bg : GStyle.headerBackgroundColor barStyle=‘light-content‘ translucent=true />
                <View style=[styles.rnim__topBar, GStyle.flex_row, backgroundColor: bg ? bg : GStyle.headerBackgroundColor]>
                    /* 返回 */
                    <TouchableOpacity style=[styles.iconBack] activeOpacity=.5 onPress=this.goBack><Text style=[GStyle.iconfont, GStyle.c_fff, GStyle.fs_18]>&#xe63f;</Text></TouchableOpacity>
                    /* 标题 */
                     !search && center ? <View style=GStyle.flex1 /> : null 
                    
                        search ? 
                        (
                            <View style=[styles.barSearch, GStyle.flex1, GStyle.flex_row]>
                                <TextInput onChangeText=text=>this.setState(searchInput: text) style=styles.barSearchText placeholder=‘搜索‘ placeholderTextColor=‘rgba(255,255,255,.6)‘ />
                            </View>
                        )
                        :
                        (
                            <View style=[styles.barTit, GStyle.flex1, GStyle.flex_row, center ? styles.barTitCenter : null]>
                                 title ? <Text style=[styles.barCell, fontSize: 16, paddingLeft: 0]>title</Text> : null 
                            </View>
                        )
                    
                    /* 右侧 */
                    <View style=[styles.barBtn, GStyle.flex_row]>
                         
                            !headerRight ? null : headerRight.map((item, index) => 
                                return(
                                    <TouchableOpacity style=[styles.iconItem] activeOpacity=.5 key=index onPress=()=>item.press ? item.press(this.state.searchInput) : null>
                                        
                                            item.type === ‘iconfont‘ ? item.title : (
                                                typeof item.title === ‘string‘ ? 
                                                <Text style=item.style ? item.style : null>`$item.title`</Text>
                                                :
                                                <Image source=item.title style=width: 24, height: 24, resizeMode: ‘contain‘ />
                                            )
                                        
                                        /* 圆点 */
                                         item.badge ? <View style=[styles.iconBadge, GStyle.badge]><Text style=GStyle.badge_text>item.badge</Text></View> : null 
                                         item.badgeDot ? <View style=[styles.iconBadgeDot, GStyle.badge_dot]></View> : null 
                                    </TouchableOpacity>
                                )
                            )
                        
                    </View>
                </View>
            </View>
        )
    

    goBack = () => 
        this.props.navigation.goBack()
    

// 创建底部TabBar
const tabNavigator = createBottomTabNavigator(
    // tabbar路由（消息、通讯录、我）
    
        Index: 
            screen: Index,
            navigationOptions: (navigation) => (
                tabBarLabel: ‘消息‘,
                tabBarIcon: (focused, tintColor) => (
                    <View>
                        <Text style=[ GStyle.iconfont, GStyle.fs_20, color: (focused ? tintColor : ‘#999‘) ]>&#xe642;</Text>
                        <View style=[GStyle.badge, position: ‘absolute‘, top: -2, right: -15,]><Text style=GStyle.badge_text>12</Text></View>
                    </View>
                )
            )
        ,
        Contact: 
            screen: Contact,
            navigationOptions: 
                tabBarLabel: ‘通讯录‘,
                tabBarIcon: (focused, tintColor) => (
                    <View>
                        <Text style=[ GStyle.iconfont, GStyle.fs_20, color: (focused ? tintColor : ‘#999‘) ]>&#xe640;</Text>
                    </View>
                )
            
        ,
        Ucenter: 
            screen: Ucenter,
            navigationOptions: 
                tabBarLabel: ‘我‘,
                tabBarIcon: (focused, tintColor) => (
                    <View>
                        <Text style=[ GStyle.iconfont, GStyle.fs_20, color: (focused ? tintColor : ‘#999‘) ]>&#xe61e;</Text>
                        <View style=[GStyle.badge_dot, position: ‘absolute‘, top: -2, right: -6,]></View>
                    </View>
                )
            
        
    ,
    // tabbar配置
    
        ...
    
)

◆ RN聊天页面功能模块

1、表情处理：原本是想着使用图片表情gif，可是在RN里面textInput文本框不能插入图片，只能通过定义一些特殊字符 :66: (:12 [奋斗] 解析表情，处理起来有些麻烦，而且图片多了影响性能，如是就改用emoj表情符。

 

faceList: [
    
        nodes: [
            ‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,
            ‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,
            ‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘del‘,
        ]
    ,
    ...
    
        nodes: [
            ‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,
            ‘??‘,‘??‘,‘??‘,‘??‘,‘??‘,‘????‘,‘????‘,
            ‘????‘,‘????‘,‘??‍??‘,‘????‍??‘,‘????‍??‘,‘????‍??‘,‘del‘,
        ]
    ,
    ...
]

2、光标定位：在指定光标处插入内容，textInput提供了光标起始位置

let selection = this.textInput._lastNativeSelection || null;
this.textInput.setNativeProps(
　　selection : start : xxx, end : xxx
)

3、textInput判断内容是否为空，过滤空格、回车

isEmpty = (html) =>
　　return html.replace(/\\r\\n|\\n|\\r/, "").replace(/(?:^[ \\t\\n\\r]+)|(?:[ \\t\\n\\r]+$)/g, "") == ""

/**
 * 聊天模块JS----------------------------------------------------
 */
// ...滚动至聊天底部
scrollToBottom = (t) => 
    let that = this
    this._timer = setTimeout(() => 
        that.refs.scrollView.scrollToEnd(animated: false)
    , t ? 16 : 0);


// ...隐藏键盘
hideKeyboard = () => 
    Keyboard && Keyboard.dismiss()


// 点击表情
handlePressEmotion = (img) => 
    if(img === ‘del‘) return

    let selection = this.editorInput._lastNativeSelection || null;
    if (!selection)
        this.setState(
            editorText : this.state.editorText + `$img`,
            lastRange: this.state.editorText.length
        )
    
    else 
        let startStr = this.state.editorText.substr(0 , this.state.lastRange ? this.state.lastRange : selection.start)
        let endStr = this.state.editorText.substr(this.state.lastRange ? this.state.lastRange : selection.end)
        this.setState(
            editorText : startStr + `$img` + endStr,
            lastRange: (startStr + `$img`).length
        )
     


// 发送消息
isEmpty = (html) => 
    return html.replace(/\\r\\n|\\n|\\r/, "").replace(/(?:^[ \\t\\n\\r]+)|(?:[ \\t\\n\\r]+$)/g, "") == ""

handleSubmit = () => 
    // 判断是否为空值
    if(this.isEmpty(this.state.editorText)) return

    let _msg = this.state.__messageJson
    let _len = _msg.length
    // 消息队列
    let _data = 
        id: `msg$++_len`,
        msgtype: 3,
        isme: true,
        avator: require(‘../../../assets/img/uimg/u__chat_img11.jpg‘),
        author: ‘王梅（Fine）‘,
        msg: this.state.editorText,
        imgsrc: ‘‘,
        videosrc: ‘‘
    
    _msg = _msg.concat(_data)
    this.setState( __messageJson: _msg, editorText: ‘‘ )

    this.scrollToBottom(true)



// >>> 【选择区功能模块】------------------------------------------
// 选择图片
handleLaunchImage = () => 
    let that = this

    ImagePicker.launchImageLibrary(
        // title: ‘请选择图片来源‘,
        // cancelButtonTitle: ‘取消‘,
        // takePhotoButtonTitle: ‘拍照‘,
        // chooseFromLibraryButtonTitle: ‘相册图片‘,
        // customButtons: [
        //     name: ‘baidu‘, title: ‘baidu.com图片‘,
        // ],
        // cameraType: ‘back‘,
        // mediaType: ‘photo‘,
        // videoQuality: ‘high‘,
        // maxWidth: 300,
        // maxHeight: 300,
        // quality: .8,
        // noData: true,
        storageOptions: 
            skipBackup: true,
        ,
    , (response) => 
        // console.log(response)

        if(response.didCancel)
            console.log(‘user cancelled‘)
        else if(response.error)
            console.log(‘ImagePicker Error‘)
        else
            let source =  uri: response.uri 
            // let source = uri: ‘data:image/jpeg;base64,‘ + response.data
            that.setState( imgsrc: source )

            that.scrollToBottom(true)
        
    )

◆ 附上vue/react/angular聊天室IM实例

Vue网页版聊天室：https://www.cnblogs.com/xiaoyan2017/p/10793728.html

React版聊天室：https://www.cnblogs.com/xiaoyan2017/p/11106246.html

Angular聊天室：https://www.cnblogs.com/xiaoyan2017/p/11194828.html