使用react-redux

1.安装react-redux

npm install react-redux --save

2.在index.js中在react-redux中引入Provider模块

import { Provider } from 'react-redux'

//applyMiddleware来自redux可以包装 store 的 dispatch

//thunk作用是使action创建函数可以返回一个function代替一个action对象

//compose整合函数

import React from 'react';

import ReactDom from 'react-dom'

import { createStore , applyMiddleware , compose } from 'redux'

import thunk from 'redux-thunk' //引入异步函数

import { Provider } from 'react-redux'

import App from './App'

import { counter } from './index.redux'

const store = createStore( counter, compose(

applyMiddleware( thunk),

window. devToolsExtension ? window. devToolsExtension() : f => f

))

ReactDom. render(

( < Provider store= { store } >

< App />

</ Provider >),

document. getElementById( 'root')

)

3.在app.js中引入connect模块

必须引入

babel-plugin-transform-decorators-legacy且在package.json中加入

"plugins": [

"transform-decorators-legacy"

]

后面才可能用@修饰符

import React from 'react'

import { Button } from 'antd-mobile'

import { connect} from 'react-redux'

import { add, remove, addAsync} from './index.redux'

@ connect(

state =>({ num : state}),

{ add , remove , addAsync}

)

class App extends React. Component{

render () {

return (

< div >

< h1 >水果 {this. props. num } </ h1 >

< Button type= "primary" onClick= {this. props. add } >点我 </ Button >

< Button type= "primary" onClick= {this. props. addAsync } >点我 </ Button >

</ div >

)

}

}

export default App