本篇文章主要的介绍了关于react的登录模块，详细的介绍了关于react的登录情况。现在就让我们一起来看看文章的正文吧

基于React的登录

第一种登录

Login页面提交登录 handleSubmit(), 中直接调用API请求。请求登录成功后跳转 history.push(nextPathname, null);

实现方式参照 http://blog.csdn.net/qq_27384769/article/details/78775835

第二种登录

Login页面提交登录 handleSubmit() 后，通过saga发起异步请求。

请求成功后发起action 调用reducer. 重新加载Login页面。

在Login页面生命周期componentWillReceiveProps 验证登录信息请求跳转。

以下是第二种登录方式的讲解

reducer 中的数据结构

auth:{ type: "COMPLOGIN/RECEIVE_DATA", isFetching: false, data: {uid: 1, permissions: Array(5), role: "系统管理员", roleType: 1, userName: "系统管理员"} }

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代码

login.jsx

componentWillReceiveProps 登录成功后调整

handleSubmit 处理提交登录

import React from 'react';import {Form, Icon, Input, Button, Checkbox} from 'antd';import {connect} from 'react-redux';import {bindActionCreators} from 'redux';import {findData, receiveData} from '../actions';import {selectVisibleMenuResourceTreeTable} from '../selector';const FormItem = Form.Item;class Login extends React.Component { componentWillMount() { const {receiveData} = this.props; receiveData(null, 'auth'); } componentWillReceiveProps(nextProps) { const {auth: nextAuth = {}} = nextProps; if (nextAuth.data && nextAuth.data.uid) { // 判断是否登陆 localStorage.setItem('user', JSON.stringify(nextAuth.data)); this.props.history.push('/', null); } } handleSubmit = (e) => { e.preventDefault(); this.props.form.validateFields((err, values) => { if (!err) { console.log('Received values of form: ', values); const {findData} = this.props; if (values.userName === 'admin' && values.password === 'admin') findData({ funcName: 'admin', stateName: 'auth' }); if (values.userName === 'guest' && values.password === 'guest') findData({ funcName: 'guest', stateName: 'auth' }); } }); }; gitHub = () => { console.log("gitHub"); }; render() { const {getFieldDecorator} = this.props.form; return (  
 
 React Admin 
   {getFieldDecorator('userName', { rules: [{required: true, message: '请输入用户名!'}], })( } placeholder="管理员输入admin, 游客输入guest"/> )}   {getFieldDecorator('password', { rules: [{required: true, message: '请输入密码!'}], })( } type="password" placeholder="管理员输入admin, 游客输入guest"/> )}   {getFieldDecorator('remember', { valuePropName: 'checked', initialValue: true, })( 记住我 )} 忘记密码  或 现在就去注册!  (第三方登录) 
  
 
 
 ); } }const mapStateToPorps = state => { return { auth: selectVisibleMenuResourceTreeTable(state) } };const mapDispatchToProps = dispatch => ({ findData: bindActionCreators(findData, dispatch), receiveData: bindActionCreators(receiveData, dispatch) });export default Form.create()(connect(mapStateToPorps, mapDispatchToProps)(Login));

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actions

findData 点击按钮发起请求

requestData 调用API前

requestData 调用API 获取到数据

import * as type from './actionTypes';export const findData = (data) => { let {funcName, stateName} = data; return { type: type.COMP_LOGIN_FIND_DATA, funcName, stateName } }export const requestData = category => ({ type: type.COMP_LOGIN_REQUEST_DATA, category });export const receiveData = (data, category) => ({ type: type.COMP_LOGIN_RECEIVE_DATA, data, category });

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actionTypes

export const COMP_LOGIN_FIND_DATA = 'COMPLOGIN/FIND_DATA';export const COMP_LOGIN_REQUEST_DATA = 'COMPLOGIN/REQUEST_DATA';export const COMP_LOGIN_RECEIVE_DATA = 'COMPLOGIN/RECEIVE_DATA';

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index

import React from 'react';import Bundle from '../../../bundle/views/bundle';import * as actions from './actions';const view = (props) => { return (  import("./lazy")}> {(View) => { return  }}  ); };export {actions, view};

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lazy 异步加载

根据组件加载对应的 sagas\reducer\view

reducer 中的数据结构：[compLoginName]: compLoginReducer

import compLoginSagas from './sagas';import compLoginReducer from './reducer';import view from './views/Login';import {UumsCompsReducerNames} from '../../constants';const compLoginName = UumsCompsReducerNames.compLogin;const reducer = { [compLoginName]: compLoginReducer };const sagas = { [compLoginName]: compLoginSagas };export {sagas, reducer, view};

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reducer

纯函数

export default (state = {}, action) => { const {type} = action; switch (type) { case types.COMP_LOGIN_REQUEST_DATA: { return { ...state, type: type, isFetching: true } } case types.COMP_LOGIN_RECEIVE_DATA: return {...state, type: type,isFetching: false, data: action.data}; default: return {...state}; } }

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sagas

异步调用

import * as http from '../axios/index';import {call, put, takeLatest} from 'redux-saga/effects';import {requestData, receiveData} from './actions';import {COMP_LOGIN_FIND_DATA} from './actionTypes';export const fetchData = ({funcName, params}) => { return http[funcName](params).then(res => { return res; }); };function* fetchLoginInfo(data) { try { let {stateName} = data; yield put(requestData()); const result = yield call(fetchData, data); yield put(receiveData(result, stateName)); } catch (e) { console.log(e); } }function* sagas() { yield takeLatest(COMP_LOGIN_FIND_DATA, fetchLoginInfo); }export default sagas;

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selector

记忆组件 selector

import {createSelector} from 'reselect';const getCompLoginData = (state) => state.compLoginData;export const selectVisibleMenuResourceTreeTable = createSelector( [getCompLoginData], (compLoginData) => compLoginData );

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