笔记二十三**、编程式路由导航

迈不过友情╰ 2024-05-01 16:24 69阅读 0赞

23.1 父组件引入 useNavigate

import {NavLink, Outlet, useNavigate} from "react-router-dom";
    ......
    // 编程式路由导航
        const navigate = useNavigate();
        const toClassify = () => {
            navigate('classify', {state: {param_C: 'elendalee', param_D: 20}})
        };
    ......
    <button onClick={toClassify}>classify</button>

父组件 Home/ndex.jsx

import React from "react";
    import {NavLink, Outlet, useNavigate} from "react-router-dom";
    
    const Home = () => {
    
        // 类组件中不能用const定义变量
        // 选中高亮
        const activeStyle = ({isActive}) => {
            return isActive ? 'background' : "";
        };
    
        // 编程式路由导航
        const navigate = useNavigate();
        const toClassify = () => {
            navigate('classify', {state: {param_C: 'elendalee', param_D: 20}})
        };
    
        return (
            <div>
                首页的页面
                <div style={
       {display: "flex", justifyContent: 'center', marginTop: '20px'}}>
                    i
                    <NavLink to='navigation' className={activeStyle}>navigation</NavLink>
                </div>
                <div style={
       {background: 'red'}}>
                    {/**/}
                    <Outlet/>
                </div>
            </div>);
    
    }
    
    export default Home;

子组件 classify.jsx

import React from 'react';
    import {useLocation} from "react-router-dom";
    
    const Classify = () => {
        // 两次结构赋值
        const {
            state: {
                param_C, param_D
            },
        } = useLocation();
        return (
            <div>
                分类的页面
                <div>
                    父组件home传递的参数1：{param_C}
                    父组件home传递的参数2：{param_D}
                </div>
            </div>
        );
    }
    
    export default Classify;

路由表

import {Navigate} from "react-router-dom";
    import Home from "../components/Home";
    import About from "../components/About";
    import Classify from "../components/Home/components/Classify.jsx";
    import Navigation from "../components/Home/components/Navigation.jsx";
    
    export default [
        {
            path: '/home',
            element: <Home/>,
            children: [
                {
                    path: 'classify',
                    element: <Classify/>
                },
                {
                    path: 'navigation',
                    element: <Navigation/>
                },
            ]
        },
        {
            path: '/about',
            element: <About/>,
        },
        {
            path: '/',
            element: <Navigate to='about'/>,
        }
    ]

main.jsx

import React from 'react'
    import ReactDOM from 'react-dom/client'
    import App from './App.jsx'
    import { HashRouter } from "react-router-dom";
    
    // 日常开发推荐 哈希路由 HashRouter 防止出现404报错
    ReactDOM.createRoot(document.getElementById("root")).render(
        <React.StrictMode>
            <HashRouter>
                <App text={"react"} />
            </HashRouter>
        </React.StrictMode>
    );

app.jsx

import React from "react";
    import {NavLink, useRoutes} from "react-router-dom";
    import routes from "./routes/index.jsx";
    import "./app.css"
    
    const App = () => {
        const element = useRoutes(routes);
        // 选中高亮
        const activeStyle = ({isActive}) => {
            return isActive ? 'background' : "";
        };
        return (
            <div className="all">
                <div>
                    <div className="link">
                        <NavLink to="/home" className={activeStyle}>打开首页的页面</NavLink>
                    </div>
                    <div className="link">
                        <NavLink to="/about" className={activeStyle}>打开关于的页面</NavLink>
                    </div>
                </div>
                <div className="view">
                    {element}
                </div>
            </div>
        );
    }
    
    export default App;