反应路由器 v4.2.2 不起作用(我想我在路由标签中做错了什么？

Question

我正在使用React-Router v4.2.2我的项目中，并且正在尝试创建一组链接到其他组件的卡。现在，我只是在测试路由器可以通过将每张卡路由到一个称为" Project1"的特定组件来测试。但是，这是不起作用的。我没有看到Project1组件内部弹出的DIV。我究竟做错了什么？？每个卡都不应该链接到Project1组件吗？

这是保存卡的主要容器的代码：

import React from 'react';
import { connect } from 'react-redux';
import { Link } from 'react-router-dom';
import ProjectCard from '../components/project_card.js';
import Project1 from '../components/project1.js';
class ProjectCards extends React.Component {
    render() {
        var projectCards = this.props.projects.map((project, i) => {
            return (
                <div key={i}>
                    <Link to={`/${project.title}`}>
                        <ProjectCard title={project.title} date={project.date} focus={project.focus}/>
                    </Link>
                </div>
            );
        });
        return (
            <div>{projectCards}</div>
        );
    }
}
function mapStateToProps(state) {
    return {
        projects: state.projects
    };
}
export default connect(mapStateToProps)(ProjectCards);

这是路由容器的代码：

import React from 'react';
import Project1 from '../components/project1.js';
import { connect } from 'react-redux';
import { Route, Switch } from 'react-router-dom';
class Routes extends React.Component{
    render() {
        var createRoutes = this.props.projects.map((project, i) => {
            return <Route key={i} exact path={`/${project.title}`} component={Project1}/>
        });
        return (
            <Switch>
                {createRoutes}
            </Switch>
        );
    }
}
function mapStateToProps(state) {
    return {
        projects: state.projects
    };
}
export default connect(mapStateToProps)(Routes);

这是index.js的代码：

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { applyMiddleware, createStore } from 'redux';
import ReduxPromise from 'redux-promise';
import { BrowserRouter } from 'react-router-dom';
import App from './components/App.jsx';
import css from '../style/style.css';
import style from '../style/style.css';
import reducers from './reducers';
const createStoreWithMiddleware = applyMiddleware(ReduxPromise)(createStore);
ReactDOM.render(
    <Provider store={createStoreWithMiddleware(reducers)}>
        <BrowserRouter>
            <App />
        </BrowserRouter>
    </Provider>
, document.getElementById('root'));

和Project1的代码，该代码应在单击卡时显示：

import React from 'react';
const Project1 = () => {
    return (
        <div>hello there this is Project1</div>
    );
}
export default Project1;

Answer 1

单击链接时，您会导航到没有定义路由的Project1。当您舔时，您基本上会破坏路线，因为开关与链接相同的组件。开关语句需要移至第三个组件，以便在单击链接卡后仍然存在。