react-redux

index.js

import React from 'react';
import ReactDom from 'react-dom';
import {createStore, applyMiddleware,compose} from 'redux';
import thunk from 'redux-thunk'
import {Provider} from 'react-redux';
import App from './App';
import {counter} from './index.redux';

//用来配置调试redux工具用
const reduxDevtools = window.devToolsExtension?window.devToolsExtension():f=>f;
//处理中间件applyMiddleware，组合函数用的compose
const store =  createStore(counter,compose(applyMiddleware(thunk),reduxDevtools));

ReactDom.render(
    
        
    ,
    document.getElementById('root')
)

index.redux.js

const ADD_GUN = '加机关枪';
const REMOVE_GUN = '减机关枪';


//reducer
export function counter(state=0,action){
    switch(action.type){
        case ADD_GUN:
            return state+1
        case REMOVE_GUN:
            return state-1
        default:
            return 10        
    }
}

//action creator
export function addGun(){
    return {type:ADD_GUN}
}
export function removeGun(){
    return {type:REMOVE_GUN}
}
export function addGunAsync(){
    return dispatch=>{
        setTimeout(()=>{
            dispatch((addGun()))
        },2000)
    }
}

App.js

import React from "react";
import { Button } from 'antd-mobile';
import { connect } from "react-redux";
import {addGun,removeGun,addGunAsync} from "./index.redux";


class App extends React.Component{
    render(){
        return (
            

                
现在有{this.props.num}
                加一把
                减一把
                异步加一把
            
        )
    }
}
const mapStatetoProps=(state)=>{
    return {num:state}
}
const actionCreators={addGun,removeGun,addGunAsync}
App = connect(mapStatetoProps,actionCreators)(App)
export default App;