react native 仿微信聊天室实例代码

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]}></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')} ]}></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')} ]}></Text>
          </View>
        )
      }
    },
    Ucenter: {
      screen: Ucenter,
      navigationOptions: {
        tabBarLabel: '我',
        tabBarIcon: ({focused, tintColor}) => (
          <View>
            <Text style={[ GStyle.iconfont, GStyle.fs_20, {color: (focused ? tintColor : '#999')} ]}></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)
    }
  })
}

总结

以上所述是小编给大家介绍的react native 仿微信聊天室实例代码,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！
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