Daotin's Blog

1. 步骤分解

包含首页，商品列表，和详情页。还有注册页面。

步骤分解

1、项目入口main.js

2、AppRouter注意加Provider，加载的是主入口 Index，需要store，所以后面创建store

3、Index入口里面才是各个实际组件

4、创建store

5、需要reduces，所以创建 homeReducer.js，确定Home页面的默认初始state

import { deepCopy } from "../deepCopy";
import { HOME_INIT } from "../actionCreators/actionTypes";

export let homeReducer = (state = {
    bannerList: [],
    goodsList: []
}, action) => {
    let newState = deepCopy(state);
    switch (action.type) {
        // 4、reducer接收到之后进行store数据的更新
        case HOME_INIT:
            newState.bannerList = action.bannerList;
            newState.goodsList = action.goodsList;
            return newState;
        default:
            return state;
    }
}

6、reducers的集合到Reducer/index.js文件

7、来看具体组件，只看个Home组件，采用自动创建容器组件的方式。 Home加载完成时，请求ajax数据。

import { connect } from "react-redux";

import { Banner } from "../components/Banner";
import { List } from "../components/List";
import { Nav } from "../components/Nav";
import { homeInitAction } from "../actionCreators/actions";

/* UI部分 */
class UI extends React.Component {
    constructor() {
        super();
    }

    // 1、组件加载完成获取ajax数据
    componentDidMount() {
        this.props.homeInit();
    }

    render() {
        let { bannerList, goodsList } = this.props;
        return (
            <div>
                <Nav />
                <Banner bannerList={bannerList} />
                <List goodsList={goodsList} />
            </div>
        );
    }
}

/* 容器部分 */
// 5、视图和store绑定
let mapStateToProps = ({ homeReducer }) => homeReducer;

let mapDispatchToProps = dispatch => {
    return {
        // 2、Ajax数据有actions.js函数获取
        homeInit() {
            dispatch(homeInitAction);
        }
    }
}

export let Home = connect(mapStateToProps, mapDispatchToProps)(UI);

8、获取ajax需要action，于是创建actions.js ，期间会用到actionTypes.js

import axios from 'axios';
import async from 'async';
import { HOME_INIT, GOODS_INIT, DETAIL_INIT, SUBMIT_ITEM } from './actionTypes';

//home
export let getHomeData = (bannerList, goodsList) => {
    return {
        type: HOME_INIT,
        bannerList,
        goodsList
    }
}

export let homeInitAction = dispatch => {
    async.parallel({
        bannerList(cb) {
            axios.get('/zhuiszhu/goods/getHot').then(({ data }) => {
                cb(null, data.list);
            })
        },
        goodsList(cb) {
            axios.get('/zhuiszhu/goods/getList').then(({ data }) => {
                cb(null, data.list);
            })
        }
    }, (err, data) => {
        if (!err) {
            // 3、获取到数据后派发给reducer
            dispatch(getHomeData(data.bannerList, data.goodsList));
        }
    })
}

将获取到的数据发送给了reducer，由于homeReducer已经创建了，只需要switch case匹配更新store数据即可。

9、由于已经在Home.js绑定视图和store同步。

// 5、视图和store绑定
let mapStateToProps = ({ homeReducer }) => homeReducer;

于是Home组件显示成功！其他Goods，Detail，Register组件同理。

TIPS：有一点需要注意：就是容器组件如何获取UI组件中input输入的值：

（完）

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