react-native聊天室|RN版聊天App仿微信实例|RN仿微信界面

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-navigationrn
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



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 (
      
 

 
   
 
 
   RN-ChatRoom v1.0.0
 
      
    )
  }

  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



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 (
   
    {}

    {}
    

    {}
    
   
  )
 }
}

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() {
    
    let{ navigation, title, bg, center, search, headerRight } = this.props

    return (
      
 
 
   {}
   
   {}
   { !search && center ?  : null }
   {
     search ? 
     (

  {this.setState({searchInput: text})}} style={styles.barSearchText} placeholder='搜索' placeholderTextColor='rgba(255,255,255,.6)' />

     )
     :
     (

  { title ? {title} : null }

     )
   }
   {}
   
     { 
!headerRight ? null : headerRight.map((item, index) => {
  return(
    item.press ? item.press(this.state.searchInput) : null}>
      {
 item.type === 'iconfont' ? item.title : (
   typeof item.title === 'string' ? 
   {`${item.title}`}
   :
   
 )
      }
      {}
      { item.badge ? {item.badge} : null }
      { item.badgeDot ?  : null }
    
  )
})
     }
   
 
      
    )
  }

  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}) => (
   
     
     12
   
 )
      })
    },
    Contact: {
      screen: Contact,
      navigationOptions: {
 tabBarLabel: '通讯录',
 tabBarIcon: ({focused, tintColor}) => (
   
     
   
 )
      }
    },
    Ucenter: {
      screen: Ucenter,
      navigationOptions: {
 tabBarLabel: '我',
 tabBarIcon: ({focused, tintColor}) => (
   
     
     
   
 )
      }
    }
  },
  // 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: [
      '','','','','','','',
      '','','藍','','','','珞',
      '樂','','','','','','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(/rn|n|r/, "").replace(/(?:^[ tnr]+)|(?:[ tnr]+$)/g, "") == ""
}


// ...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(/rn|n|r/, "").replace(/(?:^[ tnr]+)|(?:[ tnr]+$)/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聊天室|RN版聊天App仿微信实例|RN仿微信界面，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考高分网网站的支持！
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react-native聊天室|RN版聊天App仿微信实例|RN仿微信界面

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