{
 "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"
 }
}

/**
 * @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) "htmlcode">

/**
 * @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 "htmlcode">

// 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 "text-align: center">



faceList: [
  {
    nodes: [
      '"htmlcode">

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(/("") == ""
}





/**
 * 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 "").replace(/("") == ""
}
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网站的支持！

如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！

                                
                                

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