8

我刚刚开始使用 react-router V4，我想知道如何获取路由器的当前位置

这是我的源代码

import {Meteor} from 'meteor/meteor';
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import createHistory from 'history/createBrowserHistory'
import {Route, BrowserRouter as Router, Switch} from 'react-router-dom'
import {Tracker} from 'meteor/tracker';

import Signup from '../imports/ui/signUp';
import Link from '../imports/ui/link';
import Login from '../imports/ui/login';
import NotFound from '../imports/ui/notFound';

const history = createHistory();
const unauthenticatedPages = ['/', '/signup'];
const authenticatedPages = ['/links'];

const routes = (
    <Router history={history}>
        <Switch>
            <Route exact path="/" component={Login}/>
            <Route exact path="/signup" component={Signup}/>
            <Route path="/links" component={Link}/>
            <Route component={NotFound}/>
        </Switch>
    </Router>
);
Tracker.autorun(() => {
    const unlisten = history.listen((location, action) => {
        // location is an object like window.location
        console.log(action, location.pathname, location.state)
    })

    const isAuthenticated = !!Meteor.userId();
    console.log('location: ', location.pathname);
    //const pathName =
});

Meteor.startup(() => {
    ReactDOM.render(routes, document.getElementById('app'));
});

我尝试根据 react-router 文档使用历史记录，但我没有得到位置。

如何获取路线的当前位置？

我不使用 redux，如果没有它，我将不胜感激。

谢谢，迈克尔。

4

3 回答 3

8

您可以withrouter为此使用 HOC。每当路由更改时，它将重新渲染包装的组件。这是一个例子 -

import {Meteor} from 'meteor/meteor';
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import createHistory from 'history/createBrowserHistory'
import {Route, BrowserRouter as Router, Switch} from 'react-router-dom'
import {withRouter} from 'react-router'
import {Tracker} from 'meteor/tracker';

import Signup from '../imports/ui/signUp';
import Link from '../imports/ui/link';
import Login from '../imports/ui/login';
import NotFound from '../imports/ui/notFound';

const history = createHistory();
const unauthenticatedPages = ['/', '/signup'];
const authenticatedPages = ['/links'];

const
ChangeTracker = withRouter(({match, location, history}) => {
    console.log(action, location.pathname, location.state);
    return false;
}),
routes = (
    <Router history={history}>
        <Switch>
            <Route exact path="/" component={Login}/>
            <Route exact path="/signup" component={Signup}/>
            <Route path="/links" component={Link}/>
            <Route component={NotFound}/>
        </Switch>
        <ChangeTracker />
    </Router>
);

Meteor.startup(() => {
    ReactDOM.render(routes, document.getElementById('app'));
});
于 2017-04-14T10:13:15.370 回答
3

非常感谢您的帮助 - 无论您是否在经过身份验证的页面上，要保持实时更新，您可以按如下方式修改 ChangeTracker：

const ChangeTracker = withRouter(({match, location, history}) => {
  const pathName = location.pathname;
  isUnauthenticatedPage = unauthenticatedPages.includes(pathName);
  isAuthenticatedPage = authenticatedPages.includes(pathName);

  return false;
});

你的 Tracker.autorun 可能看起来像：

Tracker.autorun(()=>{
  const isAuthenticated = !!Meteor.userId();
    if (isAuthenticated){
      if (isUnauthenticatedPage){
        history.push('/links');
      }
    }else{
      if (isAuthenticatedPage) {
        history.push('/');
      }
    }
});
于 2017-10-12T13:05:21.497 回答
1

您可以从 react router v4 获取当前位置，history.location并获取您可以使用的路径名history.location.pathname。您可以在 github React Router Training上的官方反应路由器文档中找到有关它的更多详细信息。

所以你的代码应该是这样的：

import {Meteor} from 'meteor/meteor';
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import createHistory from 'history/createBrowserHistory'
import { Route, Router, Switch } from 'react-router-dom'
import {Tracker} from 'meteor/tracker';

import Signup from '../imports/ui/signUp';
import Link from '../imports/ui/link';
import Login from '../imports/ui/login';
import NotFound from '../imports/ui/notFound';

const history = createHistory();
const unauthenticatedPages = ['/', '/signup'];
const authenticatedPages = ['/links'];

const routes = (
    <Router history={history}>
        <Switch>
            <Route exact path="/" component={Login}/>
            <Route exact path="/signup" component={Signup}/>
            <Route path="/links" component={Link}/>
            <Route component={NotFound}/>
        </Switch>
    </Router>
);
Tracker.autorun(() => {
    const isAuthenticated = !!Meteor.userId();
    const pathname = history.location.pathname;
    //Now you can do whatever you want here
});

重要的！将历史作为道具传递给 BrowserRouter 会发出警告，因为默认情况下，BrowserRouter 使用其历史版本并忽略您传递的历史，因此为了防止出现此警告，您应该使用{ Router } from 'react-router-dom'而不是BrowserRouter一切都按您期望的方式工作。

于 2018-01-25T19:35:27.757 回答