action 中传递参数

App.js 中 传递自己的参数

function App (props){
  console.log(props,'===')
  return (
    <div>
      <h1>redux</h1>
      <button onClick={()=>{props.increment(10)}}>增加</button>
      <p>{props.count}</p>
      <button onClick={()=>{props.decrement(3)}}>减少</button>
    </div>
  )
}

action.js 传参

export  const increment = (num) => ({ type:'increment',payload:num })
export  const decrement = (num) => ({ type:'decrement',payload:num })

reduce.js 中打印 action

import { initstate } from "../state/state";
  //2.定义 reducer  第一个参数  state  第二个参数 action
 export  function reducer(state = initstate,action){
    console.log(action,'===action')
    switch(action.type){
      case 'increment' :return {count:state.count + action.payload}
      break;
      case 'decrement' :return {count:state.count - action.payload}
      break;
      default :return state
    }
  }

多个state状态

增加一个新的state。 控制div 的背景颜色

定义color 组建

function Color (props){
    let style = {
        width:100,
        height:100,
        background:props.color,
        textAlign:'center',
        lineHeight:100,
    }
    console.log('colorprops',props)
    return(
        <div>
            <button onClick={()=>{props.fngreen()}}>green</button>
            <button onClick={()=>{props.fnred()}}>red</button>
            <div style={style}>多个 state</div>
        </div>
    )
}
export default Color

定义state

// 3.定义state
export const  initstate = {
    count:0
}
//color
export const  colorstate = {
    color:'red'
}

定义action

export  const increment = (num) => ({ type:'increment',payload:num })
export  const decrement = (num) => ({ type:'decrement',payload:num })
//处理color
export  const fngreen = () => ({ type:'fngreen'})
export  const fnred = () => ({ type:'fnred' })

定义reducer 处理color的reducer1

import { colorstate } from "../state/state";
  //2.定义 reducer  第一个参数  state  第二个参数 action
 export  function reducer(state = colorstate,action){
    console.log(action,'===color')
    switch(action.type){
      case 'fngreen' :return {color:'green' }
      break;
      case 'fnred' :return {color:'red'}
      break;
      default :return state
    }
  }

store/index    创建store

import {createStore} from 'redux'
import{ reducer } from './reducer/reducer1'
  //1. 定义store
  let store = createStore( reducer )
  export default store 
  console.log(store)

color组建

import { connect } from 'react-redux';
import { bindActionCreators } from 'redux'
import *as actionobj from '../store/action/action'
function Color (props){
    let style = {
        width:100,
        height:100,
        background:props.color,
        textAlign:'center',
        lineHeight:100,
    }
    console.log('colorprops',props)
    return(
        <div>
            <button onClick={()=>{props.fngreen()}}>green</button>
            <button onClick={()=>{props.fnred()}}>red</button>
            <div style={style}>多个 state</div>
        </div>
    )
}
const mapStateToProps = function(state){
    return {color:state.color}
}
    const mapDispatchToProps = (dispatch) => {
    return bindActionCreators(actionobj,dispatch)
}
export default connect(mapStateToProps,mapDispatchToProps)(Color);

 整合 reducer    combineReducers(reducers)

redux/combineReducers.md at master · reduxjs/redux · GitHub

多个reducer进行整合   reducer下创建index.js

 reducer/index.js

import { combineReducers } from 'redux'
import reducer1 from './reducer1'
import reducer2 from './reducer2'
export default combineReducers({
    reducer1,
    reducer2
})

reducer1.js

import { colorstate } from "../state/state";
//2.定义 reducer  第一个参数  state  第二个参数 action
export default function reducer1(state = colorstate,action){
    console.log(action,'===color')
    switch(action.type){
      case 'fngreen' :
          return {color:'green' }  
      break;
      case 'fnred' :
          return {color:'red'}  
      break;
      default :return state
    }
}

reducer2.js

import { initstate } from "../state/state";
  //2.定义 reducer  第一个参数  state  第二个参数 action
 export default  function reducer2(state = initstate,action){
    console.log(action,'===action')
    switch(action.type){
      case 'increment' :return {count:state.count + action.payload}
      break;
      case 'decrement' :return {count:state.count - action.payload}
      break;
      default :return state
    }
  }

store/index.js

import {createStore} from 'redux'
import reducer  from './reducer'
//1. 定义store
let store = createStore( reducer )
export default store 

App.js 

注意:combineReducers   返回的结果是一个对象

{
    reducer1:{color:'red'},
    reducer2:{count:0}
}

所以在使用的。候需要。{props.reducer2.count}   background:props.reducer1.color, 

映射的时候需要解构

reducer1.js. 和reducer2.js  解构state

import { colorstate } from "../state/state";
//2.定义 reducer  第一个参数  state  第二个参数 action
export default function reducer1(state = colorstate,action){
    console.log(action,'===color')
    switch(action.type){
      case 'fngreen' :
          return {...state,color:'green' }  
      break;
      case 'fnred' :
          return {...state,color:'red'}  
      break;
      default :return state
    }
}
import { initstate } from "../state/state";
  //2.定义 reducer  第一个参数  state  第二个参数 action
 export default  function reducer2(state = initstate,action){
    console.log(action,'===action')
    switch(action.type){
      case 'increment' :return {...state,count:state.count + action.payload}
      break;
      case 'decrement' :return {...state,count:state.count - action.payload}
      break;
      default :return state
    }
  }

到此这篇关于react-redux action传参及多个state处理的实现的文章就介绍到这了,更多相关react-redux action传参及多个state处理内容请搜索阿兔在线工具以前的文章或继续浏览下面的相关文章希望大家以后多多支持阿兔在线工具!

点赞(0)

微信公众账号

微信扫一扫加关注

发表
评论
返回
顶部