Vuex模块化和命名空间namespaced实例演示:https://www.h5w3.com/240096.html

 

1. 目的:

 

 

让代码更好维护,让多种数据分类更加明确。

 

 

2. 修改store/index.js

 

 

store/index.js

 

const countAbout = {
namespaced:true,//开启命名空间
state:{x:1},
mutations: { ... },
actions: { ... },
getters: {
bigSum(state){
return state.sum * 10
}
}
}
const personAbout = {
namespaced:true,//开启命名空间
state:{ ... },
mutations: { ... },
actions: { ... }
}
const store = new Vuex.Store({
modules: {
countAbout,
personAbout
}
})

 

注意: namespaced:true,要开启命名空间

 

 

3. 开启命名空间后,组件中读取state数据:

 

 

//方式一:自己直接读取
this.$store.state.personAbout.list
//方式二:借助mapState读取:
...mapState('countAbout',['sum','school','subject']),

 

4. 开启命名空间后,组件中读取getters数据:

 

 

 

 

//方式一:自己直接读取
this.$store.getters['personAbout/firstPersonName']
//方式二:借助mapGetters读取:
...mapGetters('countAbout',['bigSum'])

 

 

5. 开启命名空间后,组件中调用dispatch

 

 

//方式一:自己直接dispatch
this.$store.dispatch('personAbout/addPersonWang',person)
//方式二:借助mapActions:
...mapActions('countAbout',{incrementOdd:'jiaOdd',incrementWait:'jiaWait'})

 

开启命名空间后,组件中调用commit

 

//方式一:自己直接commit
this.$store.commit('personAbout/ADD_PERSON',person)
//方式二:借助mapMutations:
...mapMutations('countAbout',{increment:'JIA',decrement:'JIAN'}),

 

 

例子:

Fenix:

 

 

总代码:

 

main.js

//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//引入store
import store from './store'
//关闭Vue的生产提示
Vue.config.productionTip = false
//创建vm
new Vue({
el:'#app',
render: h => h(App),
store,
beforeCreate() {
Vue.prototype.$bus = this
}
})

 

App.js

<template>
<div>
<Count/>
<hr>
<Person/>
</div>
</template>
<script>
import Count from './components/Count'
import Person from './components/Person'
export default {
name:'App',
components:{Count,Person},
 }
</script>

 

store/index.js

//该文件用于创建Vuex中最为核心的store
import Vue from 'vue'
//引入Vuex
import Vuex from 'vuex'
import countOptions from './count'
import personOptions from './person'
//应用Vuex插件
Vue.use(Vuex)
//创建并暴露store
export default new Vuex.Store({
modules:{
countAbout:countOptions,
personAbout:personOptions
}
})

 

store/count.js

 

 

//求和相关的配置
export default {
namespaced:true,
actions:{
jiaOdd(context,value){
console.log('actions中的jiaOdd被调用了')
if(context.state.sum % 2){
context.commit('JIA',value)
}
},
jiaWait(context,value){
console.log('actions中的jiaWait被调用了')
setTimeout(()=>{
context.commit('JIA',value)
},500)
}
},
mutations:{
JIA(state,value){
console.log('mutations中的JIA被调用了')
state.sum += value
},
JIAN(state,value){
console.log('mutations中的JIAN被调用了')
state.sum -= value
},
},
state:{
sum:0, //当前的和
school:'尚硅谷',
subject:'前端',
},
getters:{
bigSum(state){
return state.sum*10
}
},
}


 

store/person.js

 

 

//人员管理相关的配置
import axios from 'axios'
import { nanoid } from 'nanoid'
export default {
namespaced:true,
actions:{
addPersonWang(context,value){
if(value.name.indexOf('王') === 0){
context.commit('ADD_PERSON',value)
}else{
alert('添加的人必须姓王!')
}
},
addPersonServer(context){
axios.get('https://api.uixsj.cn/hitokoto/get?type=social').then(
response => {
context.commit('ADD_PERSON',{id:nanoid(),name:response.data})
},
error => {
alert(error.message)
}
)
}
},
mutations:{
ADD_PERSON(state,value){
console.log('mutations中的ADD_PERSON被调用了')
state.personList.unshift(value)
}
},
state:{
personList:[
{id:'001',name:'张三'}
]
},
getters:{
firstPersonName(state){
return state.personList[0].name
}
},
}

 

 

components/Count.vue

 

 

<template>
<div>
<h1>当前求和为:{{sum}}</h1>
<h3>当前求和放大10倍为:{{bigSum}}</h3>
<h3>我在{{school}},学习{{subject}}</h3>
<h3 style="color:red">Person组件的总人数是:{{personList.length}}</h3>
<select v-model.number="n">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<button @click="increment(n)">+</button>
<button @click="decrement(n)">-</button>
<button @click="incrementOdd(n)">当前求和为奇数再加</button>
<button @click="incrementWait(n)">等一等再加</button>
</div>
</template>
<script>
import {mapState,mapGetters,mapMutations,mapActions} from 'vuex'
export default {
name:'Count',
data() {
return {
n:1, //用户选择的数字
 }
 },
 computed:{
 //借助mapState生成计算属性,从state中读取数据。(数组写法)
 ...mapState('countAbout',['sum','school','subject']),
 ...mapState('personAbout',['personList']),
 //借助mapGetters生成计算属性,从getters中读取数据。(数组写法)
 ...mapGetters('countAbout',['bigSum'])
 },
 methods: {
 //借助mapMutations生成对应的方法,方法中会调用commit去联系mutations(对象写法)
 ...mapMutations('countAbout',{increment:'JIA',decrement:'JIAN'}),
 //借助mapActions生成对应的方法,方法中会调用dispatch去联系actions(对象写法)
 ...mapActions('countAbout',{incrementOdd:'jiaOdd',incrementWait:'jiaWait'})
 },
 mounted() {
 console.log(this.$store)
 },
 }
</script>
<style lang="css">
button{
margin-left: 5px;
 }
</style>

 

components/Person.vue

 

<template>
<div>
<h1>人员列表</h1>
<h3 style="color:red">Count组件求和为:{{sum}}</h3>
<h3>列表中第一个人的名字是:{{firstPersonName}}</h3>
<input type="text" placeholder="请输入名字" v-model="name">
<button @click="add">添加</button>
<button @click="addWang">添加一个姓王的人</button>
<button @click="addPersonServer">添加一个人,名字随机</button>
<ul>
<li v-for="p in personList" :key="p.id">{{p.name}}</li>
</ul>
</div>
</template>
<script>
import {nanoid} from 'nanoid'
export default {
name:'Person',
data() {
return {
name:''
 }
 },
computed:{
personList(){
return this.$store.state.personAbout.personList
 },
sum(){
return this.$store.state.countAbout.sum
 },
firstPersonName(){
return this.$store.getters['personAbout/firstPersonName']
 }
 },
methods: {
add(){
const personObj = {id:nanoid(),name:this.name}
this.$store.commit('personAbout/ADD_PERSON',personObj)
this.name = ''
 },
addWang(){
const personObj = {id:nanoid(),name:this.name}
this.$store.dispatch('personAbout/addPersonWang',personObj)
this.name = ''
 },
addPersonServer(){
this.$store.dispatch('personAbout/addPersonServer')
 }
 },
 }
</script>

 

 

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