子组件不使用 React Router v4 渲染

Question

我正在尝试使用 React 嵌套路由，这就是我的应用程序的样子

Posts.js（父（复数）组件）渲染良好。

import React from "react";
import { Route } from "react-router-dom";


import Post from "./Post";
import { Link, Switch } from "react-router-dom";


const Posts = ({ match }) => {
 return (
    <div>
        <h2>Topics</h2>
        <ul>
            <li>
                <Link to={`${match.url}/rendering`}>Rendering with React</Link>
            </li>
            <li>
                <Link to={`${match.url}/components`}>Components</Link>
            </li>
            <li>
                <Link to={`${match.url}/props-v-state`}>Props v. State</Link>
            </li>
        </ul>

        <div>

            <Route path={`${match.path}/:topicId`} component={Post} />
            <Route
                exact
                path={match.path}
                render={() => <h3>Please select a topic.</h3>}
            />
        </div>

    </div>
)}

export default Posts;

Post 组件（子（单数）组件）

import React from "react";

const Post = ({ match }) => (
 <div>
    <h1>Child component</h1>
    <h3>{match.params.topicId}</h3>
 </div>
 );
export default Post;

不确定这里缺少什么配置，父组件在路由上渲染得很好，而子组件内容没有渲染

控制台没有错误。

---

父路由配置

import React from "react";
import { Switch, Route,NavLink } from "react-router-dom";

import Home from "./container/home/Home";
import About from "./container/about/About";
import Posts from "./container/post/posts";
import PageNotFound from "./container/Error/404";

const routes = () => (
 <Switch>
    <Route path="/" exact component={Home}></Route>
    <Route path="/about" component={About}></Route>
    <Route exact path="/post" component={Posts}></Route>
    <Route component={PageNotFound}> </Route>*/}
  </Switch>

  )


 export default routes;

App.js

import React, { Component } from 'react';
import './App.css';
import Layout from "./hoc/layout/layout";



class App extends Component {
 render() {
  return (
    <Layout></Layout>
 );
}}

export default App;

Answer 1

所以你的代码中的错误是非常微不足道的。在父 Route，即渲染 Posts 组件的 Route 中，您有一个 exact 关键字，因此 Routes 像 /posts/:postId 不会匹配这个确切的 Route 与路径 /post 以及因此内部 Routes 或嵌套的子路由不起作用

您需要更改您的路线配置，例如

const routes = () => (
     <Switch>
        <Route path="/" exact component={Home}></Route>
        <Route path="/about" component={About}></Route>
        <Route path="/post" component={Posts}></Route>
        <Route component={PageNotFound}> </Route>*/}
      </Switch>
  )

  export default routes;