React中redux的使用

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组件目录结果

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components: Count/ index.jsx

import React, { Component } from 'react'
//引入action
import {
    increment,
    decrement,
    incrementAsync
} from '../../redux/actions/count'
//引入connect用于连接UI组件与redux
import {connect} from 'react-redux'

//定义UI组件
class Count extends Component {

    state = {carName:'奔驰c63'}

    //加法
    increment = ()=>{
        const {value} = this.selectNumber
        this.props.increment(value*1)
    }
    //减法
    decrement = ()=>{
        const {value} = this.selectNumber
        this.props.decrement(value*1)
    }
    //奇数再加
    incrementIfOdd = ()=>{
        const {value} = this.selectNumber
        if(this.props.count % 2 !== 0){
            this.props.increment(value*1)
        }
    }
    //异步加
    incrementAsync = ()=>{
        const {value} = this.selectNumber
        this.props.incrementAsync(value*1,500)
    }

    render() {
        //console.log('UI组件接收到的props是',this.props);
        return (
            

                
我是Count组件,下方组件总人数为:{this.props.renshu}
                
当前求和为：{this.props.count}
                 this.selectNumber = c}>
                    1
                    2
                    3
                 
                + 
                - 
                当前求和为奇数再加 
                异步加 
            
        )
    }
}

//使用connect()()创建并暴露一个Count的容器组件
export default connect(
    state => ({
        count:state.count,
        personCount:state.persons.length
    }),
    {increment,decrement,incrementAsync}
)(Count)

components: Person/ index.jsx

import React, { Component } from 'react'
import {nanoid} from 'nanoid'
import {connect} from 'react-redux'
import {addPerson} from '../../redux/actions/person'

class Person extends Component {

    addPerson = ()=>{
        const name = this.nameNode.value
        const age = this.ageNode.value*1
        const personObj = {id:nanoid(),name,age}
        this.props.addPerson(personObj)
        this.nameNode.value = ''
        this.ageNode.value = ''
    }

    render() {
        return (
            

                
我是Person组件,上方组件求和为{this.props.count}
                this.nameNode = c} type="text" placeholder="输入名字"/>
                this.ageNode = c} type="text" placeholder="输入年龄"/>
                添加
                

                    {
                        this.props.persons.map((p)=>{
                            return 
{p.name}--{p.age}
                        })
                    }
                
            
        )
    }
}

export default connect(
    state => ({
        persons:state.persons,
        count:state.count
    }),//映射状态
    {addPerson}//映射操作状态的方法
)(Person)

redux : action reducers constant.js store.js
action/ count.js

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action/ person.js

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reducers/ count.js

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reducers/ person.js

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reducers/ index.js

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redux/ constant.js

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redux/ store.js

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app.jsx

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index.js

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