React-Router-未捕获的TypeError：无法读取未定义的属性“ route”

Question

尝试将React Router v4与Redux一起使用并遇到此错误，似乎是在遵循文档，找不到关于它的任何信息，所以我很茫然：

未捕获的TypeError：无法读取未定义的属性“ route”

这是我的代码：

import React, {Component} from 'react';
import {
  BrowserRouter as Router,
  Route,
  Link,
  withRouter
} from 'react-router-dom'
import Menu from './Menu';
import { connect } from "react-redux";
import Play from './Play';
class Manager extends Component {
    render() {
        return(
             <Router>
                <div>
                  <Route exact path="/" component={Menu}/>
                  <Route path="/menu" component={Menu}/>
                  <Route path="/play" component={Play}/>
                </div>
              </Router>
        )
    }
}
export default withRouter(connect(mapStateToProps, mapDispatchToProps)(Manager));

这是完整的错误：

game.js:26838 Uncaught TypeError: Cannot read property 'route' of undefined
    at Route.computeMatch (game.js:26838)
    at new Route (game.js:26815)
    at game.js:15322
    at measureLifeCyclePerf (game.js:15102)
    at ReactCompositeComponentWrapper._constructComponentWithoutOwner (game.js:15321)
    at ReactCompositeComponentWrapper._constructComponent (game.js:15307)
    at ReactCompositeComponentWrapper.mountComponent (game.js:15215)
    at Object.mountComponent (game.js:7823)
    at ReactCompositeComponentWrapper.performInitialMount (game.js:15398)
    at ReactCompositeComponentWrapper.mountComponent (game.js:15285)

Answer 1

在这里，您使用的是4.0.0以上的react-router-dom最新版本。

因此，没有路由器可用。 您需要在此版本中使用BrowserRouter。

您的代码将是

import React, {Component} from 'react';
import {
  Switch,
 Route,
 Link,
 withRouter
} from 'react-router-dom'
import Menu from './Menu';
import { connect } from "react-redux";
import Play from './Play';
class Manager extends Component {
   render() {
    return(<div>
         <Switch>

              <Route exact path="/" component={Menu}/>
              <Route path="/menu" component={Menu}/>
              <Route path="/play" component={Play}/>

          </Switch></div>
    )
}
}
 export default withRouter(connect(mapStateToProps, mapDispatchToProps)(Manager));

并在index.js文件中使用BrowserRouter呈现此组件

import { BrowserRouter } from 'react-router-dom';
ReactDOM.render((<BrowserRouter><Manager/></BrowserRouter>), document.getElementById('root'));

Answer 2

将您的路由器更改为新的反应路由器4.0，称为“ react-router-dom”

使用npm / yarn安装模块“ react-router-dom”，像这样定义您的路由器。

不要忘记进口。 从“ react-router-dom”导入{BrowserRouter，Route}；

         <BrowserRouter>
              <div>
              <Route exact path="/" component={Menu}/>
              <Route path="/menu" component={Menu}/>
              <Route path="/play" component={Play}/>
              </div>
          </BrowserRouter>

Answer 3

您不需要使用比实际路由器高的路由器：)只需将其删除：

export default connect(mapStateToProps, mapDispatchToProps)(Manager);

如果要访问嵌套在Route中的组件内部的历史记录信息，则需要与Router HOC一起使用。 您可以在此处找到详细信息： https : //reacttraining.com/react-router/web/api/withRouter

Answer 4

因此，当我从可运行的webpack服务器上运行它时，我是在本地服务器上运行它。

Answer 5

我通过在<Router></Router>内移动<Navigation />解决此问题