ReactChat聊天IM实例|react18.x仿微信App

基于最新构建工具Vite4.x创建react18聊天项目，使用了react18+react-dom+react-vant+zustand等技术架构开发，实现了发送图文消息、图片/视频预览、红包/朋友圈等功能。

技术框架

• 编辑工具：vscode
• 框架技术：react18+react-dom
• 构建工具：vite4.x
• UI组件库：react-vant (有赞react移动端UI库)
• 状态管理：zustand^4.3.9
• 路由管理：react-router-dom^6.14.2
• className混合：clsx^2.0.0
• 弹框组件：rcpop (基于react18 hooks自定义手机端弹框组件)
• 样式处理：sass^1.64.1

项目结构

react-chat整个项目采用react18 hooks函数组件编码开发。

react18 hooks自定义弹框组件

项目中使用到的弹框功能均是react18.x hooks自定义函数组件RcPop。整合了msg/alert/dialog/toast及android/ios等弹窗效果。支持20+参数、组件式+函数式两种调用方式。

如果对react18 hooks开发弹窗感兴趣，可以去看看下面的这篇分享文章。
https://blog.csdn.net/yanxinyun1990/article/details/132019347

react18自定义navbar+tabbar组件

项目中顶部导航栏及底部菜单栏均是自定义组件实现功能。

<Navbar
    back={false}
    bgcolor="linear-gradient(to right, #139fcc, #bc8bfd)"
    title={<span className="ff-gg">React18-Chat</span>}
    fixed
    right={
        <>
            <i className="iconfont ve-icon-search"></i>
            <i className="iconfont ve-icon-plus-circle-o ml-30"></i>
        </>
    }
/>

<Tabbar bgcolor="#fefefe" onClick={handleTabClick} />

main.jsx配置

import React from 'react'
import ReactDOM from 'react-dom/client'
import App from './App.jsx'
import './style.scss'

ReactDOM.createRoot(document.getElementById('root')).render(
    <React.StrictMode>
        <App />
    </React.StrictMode>,
)

App.jsx主模板

import { HashRouter } from 'react-router-dom'

// 引入路由配置
import Router from './router'

import '@assets/js/fontSize'

function App() {
    return (
        <>
            <HashRouter>
                <Router />
            </HashRouter>
        </>
    )
}

export default App

react-router-dom v6路由配置

/**
 * react-router-dom路由配置管理
 * andy Q：282310962
*/

import { lazy, Suspense } from 'react'
import { useRoutes, Outlet, Navigate } from 'react-router-dom'
import { Loading } from 'react-vant'

import { authStore } from '@/store/auth'

// 引入路由页面
import Login from '@views/auth/login'
import Register from '@views/auth/register'
const Index = lazy(() => import('@views/index'))
const Contact = lazy(() => import('@views/contact'))
const Uinfo = lazy(() => import('@views/contact/uinfo'))
const Chat = lazy(() => import('@views/chat/chat'))
const ChatInfo = lazy(() => import('@views/chat/info'))
const RedPacket = lazy(() => import('@views/chat/redpacket'))
const My = lazy(() => import('@views/my'))
const Fzone = lazy(() => import('@views/my/fzone'))
const Wallet = lazy(() => import('@views/my/wallet'))
const Setting = lazy(() => import('@views/my/setting'))
const Error = lazy(() => import('@views/404'))

// 加载提示
const SpinLoading = () => {
  return (
    <div className="rc__spinLoading">
      <Loading size="20" color="#087ea4" vertical textColor="#999">加载中...</Loading>
    </div>
  )
}

// 延迟加载
const lazyload = children => {
  // React 16.6 新增了<Suspense>组件,让你可以“等待”目标代码加载,并且可以直接指定一个加载的界面
  // 懒加载的模式需要我们给他加上一层 Loading的提示加载组件
  return <Suspense fallback={<SpinLoading />}>{children}</Suspense>
}

// 路由鉴权验证
const RouterAuth = ({ children }) => {
  const authState = authStore()

  return authState.isLogged ? (
    children
  ) : (
    <Navigate to="/login" replace={true} />
  )
}

// 路由占位模板(类似vue中router-view)
const RouterLayout = () => {
  return (
    <div className="rc__container flexbox flex-col">
      <Outlet />
    </div>
  )
}

// useRoutes集中式路由配置
export const routerConfig = [
  {
    path: '/',
    element: lazyload(<RouterAuth><RouterLayout /></RouterAuth>),
    children: [
      // 首页
      // { path: '/', element: <Index /> },
      { index: true, element: <Index /> },

      // 通讯录模块
      // { path: '/contact', element: lazyload(<Contact />) },
      { path: '/contact', element: <Contact /> },
      { path: '/uinfo', element: <Uinfo /> },

      // 聊天模块
      { path: '/chat', element: <Chat /> },
      { path: '/chatinfo', element: <ChatInfo /> },
      { path: '/redpacket', element: <RedPacket /> },

      // 我的模块
      { path: '/my', element: <My /> },
      { path: '/fzone', element: <Fzone /> },
      { path: '/wallet', element: <Wallet /> },
      { path: '/setting', element: <Setting /> },

      // 404模块 path="*"不能省略
      { path: '*', element: <Error /> }
    ]
  },
  // 登录/注册
  { path: '/login', element: <Login /> },
  { path: '/register', element: <Register /> }
]

const Router = () => useRoutes(routerConfig)

export default Router

react18状态管理Zustand

react18 hooks推荐使用zustand状态管理插件，当然redux也可以使用。zustand小巧、上手简单，语法类似vue3 pinia语法。

/**
 * Zustand状态管理，配合persist本地持久化存储
*/
import { create } from 'zustand'
import { persist, createJSONStorage } from 'zustand/middleware'

export const authStore = create(
    persist(
        (set, get) => ({
            isLogged: false,
            token: null,
            loggedData: (data) => set({isLogged: data.isLogged, token: data.token})
        }),
        {
            name: 'authState',
            // name: 'auth-store', // name of the item in the storage (must be unique)
            // storage: createJSONStorage(() => sessionStorage), // (optional) by default, 'localStorage' is used
        }
    )
)

reactChat聊天模块

编辑器使用div可编辑功能contentEditable，支持光标处插入表情，多行文本输入。

<div
    {...rest}
    ref={editorRef}
    className={clsx('editor', className)}
    contentEditable
    onClick={handleClick}
    onInput={handleInput}
    onFocus={handleFocus}
    onBlur={handleBlur}
    style={{'userSelect': 'none', 'WebkitUserSelect': 'none'}}
>
</div>

该输入框解决了react18 hooks光标会跳动到首位。

/**
 * 编辑器模板
*/
import { useRef, useState, useEffect, forwardRef, useImperativeHandle } from 'react'
import clsx from 'clsx'

const Editor = forwardRef((props, ref) => {
    const {
        // 编辑器值
        value = '',

        // 事件
        onClick = () => {},
        onFocus = () => {},
        onBlur = () => {},
        onChange = () => {},

        className,
        ...rest
    } = props

    const [editorText, setEditorText] = useState(value)
    const editorRef = useRef(null)

    const isChange = useRef(true)
    // 记录光标位置
    const lastCursor = useRef(null)

    // 获取光标最后位置
    const getLastCursor = () => {
        let sel = window.getSelection()
        if(sel && sel.rangeCount > 0) {
            return sel.getRangeAt(0)
        }
    }

    const handleInput = () => {
        setEditorText(editorRef.current.innerHTML)

        lastCursor.current = getLastCursor()
    }
    
    // 点击编辑器
    const handleClick = () => {
        onClick?.()

        lastCursor.current = getLastCursor()
    }
    // 获取焦点
    const handleFocus = () => {
        isChange.current = false
        onFocus?.()

        lastCursor.current = getLastCursor()
    }
    // 失去焦点
    const handleBlur = () => {
        isChange.current = true
        onBlur?.()
    }

    // 删除内容
    const handleDel = () => {
        let range
        let sel = window.getSelection()
        if(lastCursor.current) {
            sel.removeAllRanges()
            sel.addRange(lastCursor.current)
        }
        range = getLastCursor()
        range.collapse(false)
        document.execCommand('delete')

        // 删除表情时禁止输入法
        setTimeout(() => { editorRef.current.blur() }, 0);
    }
    // 清空编辑器
    const handleClear = () => {
        editorRef.current.innerHTML = ''
    }

    // 光标处插入内容 @param html 需要插入的内容
    const insertHtmlAtCursor = (html) => {
        let sel, range
        if(!editorRef.current.childNodes.length) {
            editorRef.current.focus()
        }

        if(window.getSelection) {
            // IE9及其它浏览器
            sel = window.getSelection()

            // ##注意：判断最后光标位置
            if(lastCursor.current) {
                sel.removeAllRanges()
                sel.addRange(lastCursor.current)
            }

            if(sel.getRangeAt && sel.rangeCount) {
                range = sel.getRangeAt(0)
                range.deleteContents()
                let el = document.createElement('div')
                el.appendChild(html)
                var frag = document.createDocumentFragment(), node, lastNode
                while ((node = el.firstChild)) {
                    lastNode = frag.appendChild(node)
                }
                range.insertNode(frag)
                if(lastNode) {
                    range = range.cloneRange()
                    range.setStartAfter(lastNode)
                    range.collapse(true)
                    sel.removeAllRanges()
                    sel.addRange(range)
                }
            }
        } else if(document.selection && document.selection.type != 'Control') {
            // IE < 9
            document.selection.createRange().pasteHTML(html)
        }
    }

    useEffect(() => {
        if(isChange.current) {
            setEditorText(value)
        }
    }, [value])

    useEffect(() => {
        onChange?.(editorText)
    }, [editorText])

    // 暴露指定的方法给父组件调用
    useImperativeHandle(ref, () => ({
        insertHtmlAtCursor,
        handleDel,
        handleClear
    }))

    return (
        ...
    )
})

export default Editor

OK，基于react18+react-vant仿微信聊天实例就分享到这里。

Tauri+Vue3+Pinia2中后台管理系统

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