总体概述

一个完善的路由系统应该是这样子的，当链接到的组件是需要登录后才能查看，要能够跳转到登录页，然后登录成功后又跳回来之前想访问的页面。这里主要是用一个权限控制类来定义路由路由信息，同时用redux把登录成功后要访问的路由地址给保存起来，登录成功时看redux里面有没有存地址，如果没有存地址就跳转到默认路由地址。

路由权限控制类

在这个方法里面，通过sessionStorage判断是否登录了，如果没有登录，就保存一下当前想要跳转的路由到redux里面。然后跳转到我们登录页。

import React from 'react'import { Route, Redirect } from 'react-router-dom'import { setLoginRedirectUrl } from '../actions/loginAction'class AuthorizedRoute extends React.Component { render() { const { component: Component, ...rest } = this.props const isLogged = sessionStorage.getItem("userName") != null ? true : false; if(!isLogged) { setLoginRedirectUrl(this.props.location.pathname); } return ( <Route {...rest} render={props => { return isLogged ? <Component {...props} /> : <Redirect to="/login" /> }} /> ) }}export default AuthorizedRoute

路由定义信息

路由信息也很简单。只是对需要登录后才能查看的路由用AuthorizedRoute定义。

import React from 'react'import { BrowserRouter, Switch, Route, Redirect } from 'react-router-dom'import Layout from '../pages/layout/Layout'import Login from '../pages/login/Login'import AuthorizedRoute from './AuthorizedRoute'import NoFound from '../pages/noFound/NoFound'import Home from '../pages/home/Home'import Order from '../pages/Order/Order'import WorkOrder from '../pages/Order/WorkOrder'export const Router = () => ( <BrowserRouter> <div> <Switch> <Route path="/login" component={Login} /> <Redirect from="/" exact to="/login"/>{} <AuthorizedRoute path="/layout" component={Layout} /> <Route component={NoFound}/> </Switch> </div> </BrowserRouter>)

登录页

就是把存在redux里面的地址给取出来，登录成功后就跳转过去，如果没有就跳转到默认页面，我这里是默认跳到主页。因为用了antd的表单，代码有点长，只需要看连接redux那两句和handleSubmit里面的内容。

import React from 'react'import './Login.css'import { login } from '../../mock/mock'import { Form, Icon, Input, Button, Checkbox } from 'antd';import { withRouter } from 'react-router-dom';import { connect } from 'react-redux'const FormItem = Form.Item;class NormalLoginForm extends React.Component { constructor(props) { super(props); this.isLogging = false; } handleSubmit = (e) => { e.preventDefault(); this.props.form.validateFields((err, values) => { if (!err) { this.isLogging = true; login(values).then(() => { this.isLogging = false; let toPath = this.props.toPath === '' ? '/layout/home' : this.props.toPath this.props.history.push(toPath); }) } }); } render() { const { getFieldDecorator } = this.props.form; return ( <Form onSubmit={this.handleSubmit.bind(this)} className="login-form"> <FormItem> {getFieldDecorator('userName', { rules: [{ required: true, message: 'Please input your username!' }], })( <Input prefix={<Icon type="user" style={{ color: 'rgba(0,0,0,.25)' }} />} placeholder="Username" /> )} </FormItem> <FormItem> {getFieldDecorator('password', { rules: [{ required: true, message: 'Please input your Password!' }], })( <Input prefix={<Icon type="lock" style={{ color: 'rgba(0,0,0,.25)' }} />} type="password" placeholder="Password" /> )} </FormItem> <FormItem> {getFieldDecorator('remember', { valuePropName: 'checked', initialValue: true, })( <Checkbox>Remember me</Checkbox> )} <a className="login-form-forgot" href="">Forgot password</a> <Button type="primary" htmlType="submit" className="login-form-button" loading={this.isLogging ? true : false}> {this.isLogging ? 'Loging' : 'Login'} </Button> Or <a href="">register now!</a> </FormItem> </Form> ); }}const WrappedNormalLoginForm = Form.create()(NormalLoginForm);const loginState = ({ loginState }) => ({ toPath: loginState.toPath})export default withRouter(connect( loginState)(WrappedNormalLoginForm))

顺便说一下这里redux的使用吧。我暂时只会基本使用方法：定义reducer，定义actions,创建store，然后在需要使用redux的变量时候去connect一下redux，需要dispatch改变变量时，就直接把actions里面的方法引入，直接调用就可以啦。为了让actions和reducer里面的事件名称对的上，怕打错字和便于后面修改吧，我建了个actionsEvent.js来存放事件名称。
reducer:

import * as ActionEvent from '../constants/actionsEvent'const initialState = { toPath: ''}const loginRedirectPath = (state = initialState, action) => { if(action.type === ActionEvent.Login_Redirect_Event) { return Object.assign({}, state, { toPath: action.toPath }) } return state;}export default loginRedirectPath

actions:

import store from '../store'import * as ActionEvent from '../constants/actionsEvent'export const setLoginRedirectUrl = (toPath) => { return store.dispatch({ type: ActionEvent.Login_Redirect_Event, toPath: toPath })}

创建store

import { createStore, combineReducers } from 'redux'import loginReducer from './reducer/loginReducer'const reducers = combineReducers({ loginState: loginReducer //这里的属性名loginState对应于connect取出来的属性名})const store = createStore(reducers)export default store

差点忘记说了，路由控制类AuthorizedRoute参考了https://codepen.io/bradwestfall/project/editor/XWNWge?preview_height=50&open_file=src/app.js 这里的代码。感觉这份代码挺不错的，我一开始不会做就是看懂它才有点思路。

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