Vuex实现计数器以及列表展示效果

import Vue from "vue"
import Vuex from 'vuex'

Vue.use(Vuex);  //务必在new Vuex.Store之前use一下

export default new Vuex.Store({
 state:{
  count:0    //计数器的count
 },
 mutations:{
  increment(state){
   state.count++
  }
 }
})

new Vue({
 el: '#app',
 router,
 store,    //注册store
 components: { App },
 template: '<App/>'
});

<template>
 <div>
  <input type="button" value="+" @click="incr" />
  <input type="text" id="input" v-model="count"/>
  <input type="button" value="-"/>
  <br/>
  <router-link to="/list">列表demo</router-link>
 </div>
</template>

<script>
 import store from '../store'
 export default {

  computed:{
   count:{
    get:function () {
     return store.state.count
    },
    set:function (val) {
     store.state.count = val
    }
   }
  },

  methods:{
   incr(){
    // store.commit("increment")
    store.commit("increment")  //触发修改
   }
  }
 }
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>

</style>

import Vue from 'vue'
import Router from 'vue-router'
import Num from '../components/Num'
import List from '../components/List'

Vue.use(Router)

export default new Router({
 routes: [
  {
   path:'/num',
   component:Num
  },

  {
   path:"*",
   redirect:"/num"
  }
 ]
})

const _cover = [
 {"id": 1, "title": "iPad 4 Mini", "price": 500.01, "inventory": 2},
 {"id": 2, "title": "H&M T-Shirt White", "price": 10.99, "inventory": 10},
 {"id": 3, "title": "Charli XCX - Sucker CD", "price": 19.99, "inventory": 5}
];


export default {
 getCover(cb) {
  setTimeout(() => cb(_cover), 100);
/*  $.get("/api/data",function (data) {
   console.log(data);
  })*/

 },
}

import cover from '../../api/cover'

const state = {
 all:[]
};

const getters={
 allCover:state=>state.all  //getter用来提供访问接口
};

const actions = {
 getAllCover({commit}){
  cover.getCover(covers=>{
   commit('setCover',covers)    //触发setCover修改。
  })
 },
 removeCover({commit},cover){
  commit('removeCover',cover)
 }
};

const mutations = {  //mutations用来修改state。
 setCover(state,covers){
  state.all = covers
 },
 removeCover(state,cover){
  console.log(cover.id);
  state.all = state.all.filter(function (OCover) {
   return OCover.id !== cover.id
  })
 }
};

export default {
 state,getters,actions,mutations
}

import Vue from "vue"
import Vuex from 'vuex'
import cover from './modules/cover'

Vue.use(Vuex);  //务必在new Vuex.Store之前use一下

export default new Vuex.Store({

 modules:{
  cover     //注册cover数据模型
 },

 state:{
  count:0    //计数器的count
 },
 mutations:{
  increment(state){
   state.count++
  }
 }
})

<template>
 <div class="list">
  <ul>
   <li v-for="cover in covers" @click="removeCover(cover)">
    {{cover.title}}
   </li>
  </ul>
  <p>
   {{covers}}
  </p>
  <h2>请尝试点击li。</h2>
  <router-link to="/num">计数器demo</router-link>

 </div>
</template>

<script>
import {mapGetters,mapActions} from 'vuex';

export default {
 computed:mapGetters({
  covers:"allCover"   //利用module的getter获得数据
 }),

 methods:mapActions([
  'removeCover'    //利用module的action删除数据
 ]),

 created(){
  this.$store.dispatch('getAllCover')  //调用cover数据模型的getAllCover action 用来初始化列表数据。
 }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
 .list{
  text-align: left;
 }
</style>

import Vue from 'vue'
import Router from 'vue-router'
import Num from '../components/Num'
import List from '../components/List'

Vue.use(Router)

export default new Router({
 routes: [
  {
   path:'/num',
   component:Num
  },
  {
   path:'/list',
   component:List
  },
  {
   path:"*",
   redirect:"/num"
  }
 ]
})