笔记二十、使用路由Params进行传递参数

àì夳堔傛蜴生んèń 2024-05-01 16:23 57阅读 0赞

### 20.1、在父组件中设置路由参数 ###

--------------------

> <NavLink to=\{\`classify/$\{this.state.name\}\`\} className=\{this.activeStyle\}>classify</NavLink>

父组件 Home/index.jsx

import React from "react";
    import {NavLink, Outlet} from "react-router-dom";
    
    class App extends React.Component {
    
        // 类组件中不能用const定义变量
        // 选中高亮
        activeStyle = ({isActive}) => {
            return isActive ? 'background' : "";
        };
        state = {name: 'lcq-lcq'};
    
        render() {
            return (
                <div>
                    首页的页面
                    <div style={
       {display: "flex", justifyContent: 'center', marginTop: '20px'}}>
                        <NavLink to={`classify/${this.state.name}`} className={this.activeStyle}>classify</NavLink>
                        <NavLink to='navigation' className={this.activeStyle}>navigation</NavLink>
                    </div>
                    <div style={
       {background: 'red'}}>
                        {/**/}
                        <Outlet/>
                    </div>
                </div>);
        }
    }
    
    export default App;

### 20.2 在路由表中设置路由参数 ###

> path: 'classify/:param',

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/:param',
                    element:<Classify />
                },
                {
                    path: 'navigation',
                    element:<Navigation />
                },
            ]
        },
        {
            path: '/about',
            element: <About/>,
        },
        {
            path: '/',
            element: <Navigate to='about'/>,
        }
    ]

### 20.3 在子组件中获取路由参数 ###

import React from 'react';
    import {useParams} from "react-router-dom";
    
    const Classify = () => {
        const params = useParams();
        console.log(params);
        return (
            <div>
                分类的页面
                <div>
                    父组件home传递的参数：{params.param}
                </div>
            </div>
        );
    }
    
    export default Classify;