Vue（六）——vuex（二）

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
  }
})

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

//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'])

//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'})

//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'}),

//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
    }
  },
}

//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
    }
  },
}

//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
  }
})

<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>

<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>