Vuex-＞vuex获取值以及改变值，vuex异步请求

• vuex获取值以及改变值
• vuex异步请求

1.vuex获取值以及改变值

Vuex分成五个部分：

   1.State：单一状态树

   2.Getters：状态获取

   3.Mutations：触发同步事件

   4.Actions：提交mutation，可以包含异步操作

   5.Module：将vuex进行分模块

---

Vuex安装

 npm install vuex -S

 npm i -S [email protected]

 Vuex使用

//src/views/vux/page2

//src/views/vuex/page1

//src/router/index.js
import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import AppMain from '@/components/AppMain'
import LeftNav from '@/components/LeftNav'
import TopNav from '@/components/TopNav'
import Login from '@/views/Login'
import Register from '@/views/Register'
import AddBook from '@/views/book/AddBook'
import BookList from '@/views/book/BookList'
import page1 from '@/views/vuex/page1'
import page2 from '@/views/vuex/page2'
Vue.use(Router)

export default new Router({
  routes: [{
      path: '/',
      name: 'Login',
      component: Login
    },
    {
      path: '/Register',
      name: 'Register',
      component: Register
    },
    {
      path: '/AppMain',
      name: 'AppMain',
      component: AppMain,
      children: [{
          path: '/LeftNav',
          name: 'LeftNav',
          component: LeftNav
        },
        {
          path: '/TopNav',
          name: 'TopNav',
          component: TopNav
        },
        {
          path: '/book/AddBook',
          name: 'AddBook',
          component: AddBook
        },
        {
          path: '/book/BookList',
          name: 'BookList',
          component: BookList
        },
        {
          path: '/vuex/page1',
          name: 'page1',
          component: page1
        },
        {
          path: '/vuex/page2',
          name: 'page2',
          component: page2
        }]
    }
  ]

})

//src/components/LeftNav.vue

vuex获取值以及改变值

结构

//src/store/state.js
export default{
  eduName:'卓京教育',
  aname:'',
  bname:''
}

//src/store/mutations.js
export default{
  setEduName:(state,payload) => {
    // state指的就是state.js文件导出的对象
    //payload就是vue文件传递过来的参数
    // A.vue name  {a_name:this.name}
    // B.vue name  {b_name:this.name}
    // state.aname=payload.a_name;
    // state.bname=payload.b_name;
    state.eduName=payload.eduName
      }
}

//src/store/getters.js
export default{
  getEduName:(state) => {
    return state.eduName;
      }
}

//src/store/index.js
import Vue from 'vue'
import Vuex from 'vuex'
import state from './state'
import getters from './getters'
import actions from './actions'
import mutations from './mutations'
Vue.use(Vuex)
const store = new Vuex.Store({
 	state,
 	getters,
 	actions,
 	mutations
 })

 export default store

//src/main.js
// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
//开发环境：true && require('@/mock')
//生产环境：false && require('@/mock')
//开发环境下才会引入mockjs
// process.env.MOCK && require('@/mock')
// 新添加1
import ElementUI from 'element-ui'
// 新添加2，避免后期打包样式不同，要放在import App from './App';之前
import 'element-ui/lib/theme-chalk/index.css'

import App from './App'
import router from './router'
import store from './store'

import axios from '@/api/http'
import VueAxios from 'vue-axios'

Vue.use(VueAxios,axios)
// 新添加3
Vue.use(ElementUI);
Vue.config.productionTip = false
/* eslint-disable no-new */


new Vue({
  el: '#app',
  router,
  store,
  data(){
    return{
       Bus:new Vue()
    }
  },
  components: { App },
  template: ''
})

//src/views/vuex/page1.vue

//src/views/vuex/page2.vue

2.vuex异步请求

同步：某一个时间点只做一件事情，只有当这件事做完，才做另一件事

异步：某一个时间点，可以做许多事情

//src/api/action.js 
 /**
   * 对后台请求的地址的封装，URL格式如下：
   * 模块名_实体名_操作
   */
  export default {
    'SERVER': 'http://localhost:8080/ssm', //服务器
    'SYSTEM_USER_DOLOGIN': '/user/userLogin', //登陆
    'SYSTEM_USER_DOREG': '/user/userRegister', //注册
    'SYSTEM_MENUS': '/module/queryRootNode', //左侧菜单树
    'BOOK_LIST': '/book/queryBookPager', //书籍列表
    'BOOK_ADD': '/book/addBook', //书籍增加
    'BOOK_UPD': '/book/editBook', //书籍修改
    'BOOK_DEL': '/book/delBook', //书籍删除
    'VUEX_AJAX': '/vuex/queryVuex', //vuex后台异步请求
    'getFullPath': k => { //获得请求的完整地址，用于mockjs测试时使用
      return this.SERVER + this[k];
    }
  }

//src/store/actions.js
export default {
  setEduNameAsync: (context, payload) => {
    // context指的是vuex的上下文
    setTimeout(function() {
      context.commit('setEduName', payload);
    }, 15000);
  },
  setEduNameAjax: (context, payload) => {
    //this并不代表vue实例
    let _this=payload._this;
    let url=_this.axios.urls.VUEX_AJAX;
    let params={
      resturantName:payload.eduName
    }
    _this.axios.post(url, params).then(r => {
      console.log(r)
    }).catch(e => {
      console.log(e);
    });
  }
}

//src/views/vuex/page1