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"}
}

Nach dem Login kopieren

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));

Nach dem Login kopieren

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
});

Nach dem Login kopieren

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';

Nach dem Login kopieren

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};

Nach dem Login kopieren

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};

Nach dem Login kopieren

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};
    }
}

Nach dem Login kopieren

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;

Nach dem Login kopieren

selector

记忆组件 selector

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

Nach dem Login kopieren

本篇文章到这就结束了（想看更多就到PHP中文网React使用手册栏目中学习），有问题的可以在下方留言提问。

以上是React如何实现登录？react登录模块的详解的详细内容。更多信息请关注PHP中文网其他相关文章！