网上不是说可以通过constructor(props,context){},然后还有生命周期中的第三个参数获取到store吗,为什么我拿到的总是空

代码如下,简单来讲就是context全场为空,什么意思

子组件伪代码

import React from 'react'
import { Form, Input, Select, TreeSelect, Button, Row, Col, message } from 'antd'
import './style/form.scss'
import store from './store'

const FormItem = Form.Item

// @Form.create()
class ListForm extends React.Component {
    constructor(props) {
        super(props)
        this.state = {
            control: null,
            formItems: null,
            formType: this.props.formType
        }
    }
   
    componentDidMount() {


    }
    componentWillMount() {
        const action = {
            // 派发一个action
            type: 'transmit_form_api',
            value: this.props.form
        }
        store.dispatch(action)
    }
    componentDidUpdate() {
        console.log('form updated')
    }
   
    render() {
       
        return (
            <div >
               ...
            </div>
        )
    }
}

ListForm = Form.create()(ListForm)
export default ListForm

父组件伪代码

import React from 'react'
import ListForm from 'components/List/ListForm'
import ListTable from 'components/List/ListTable'
import { Button, Input, Form } from 'antd'
import axios from 'axios'
import { connect } from 'react-redux'
import store from '../../../components/List/store'


const FormItem = Form.Item




class Plugin extends React.Component {
    constructor(props,context) {
        console.log(context)        // {} ?
        super(props)
        this.state = {
            list: []
        }
       
    }
 
    componentDidMount() {
        console.log('page mounted',this.props)
        // this.listForm.setFieldsValue({
        //     odd: 111
        // })
    }
    componentWillUpdate(nextProps,nextState,nextContext) {
        console.log('page willUpdata',nextContext)                  // {} ??

    }
    componentDidUpdate(prevtProps,prevtState,p~~~~revContext) {
        console.log('page updated')
        console.log(prevContext)        // {} ??

    }
    
    render() {
        // const { getFieldDecorator } = this.listForm
        return (
            <div>
                <header>info</header>
                <ListForm
                    showSelectOption={this.selectData}
                    formType={this.formType}
                    onSubmit={this.submitData}
                    export={false}
                    getTableData={this.getTableData.bind(this)} /
                </ListForm>
               

            </div>
        )
    }
}

const mapStateToProps = (state) => {
    // console.log(state.listForm)     
    return {
        form: state.listForm
    }
}
// export default Plugin
export default connect(mapStateToProps,null)(Plugin)

路由文件

import React from 'react'
import { HashRouter as Router, Route, Switch } from 'react-router-dom'
import Home from '../view/Home'
import Plugin from '../view/Plugin/List'
import store from '../components/List/store/index'
import { Provider } from 'react-redux'

const routes = (
    <Provider store={store}>
        <Router>
            <Switch>
                <Route exact path="/home" component={Home}></Route>
                
                <Route exact path="/plugin" component={Plugin}></Route>         // 测试的路由页面
            </Switch>
        </Router>
    </Provider>
)

export default routes