我该如何使Keepalive在Vue中工作？

问题描述

页面列表中有表格，表格和分页。从detail.vue返回后，我想保持表单输入，表数据和当前页数不变，但是每次都会刷新。

我需要将表单数据，表格数据和页码存储在某个地方以使其起作用吗？谢谢。

路由器

{      
    path: '/list',name: 'List',component: resolve => require(['@/pages/list'],resolve),Meta: {          
        keepAlive: true 
    }    
}

App.vue

<div class="app">
    <keep-alive>
      <router-view v-if="$route.Meta.keepAlive"></router-view>
    </keep-alive>
    <router-view v-if="!$route.Meta.keepAlive"></router-view>
</div>

list.vue

分页位于组件ListTable内

<template>
  <div class="app-container">
    <el-form ref="form" :model="form" label-width="100px">
      <el-form-item label="MID" prop="name">
        <el-input v-model="form.mid" />
      </el-form-item>    
      <el-form-item label="Name" prop="name">
        <el-input v-model="form.name" />
      </el-form-item>    
      <el-form-item label="Birthdate" prop="birthdate">
        <el-date-picker
          v-model="form.birthdate"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
    </el-form>
    <ListTable ref="childTable" :listdata="listData" :currpage="currPage" />
  </div>
</template>

<script>
export default {
  name: 'MemberList',components: {
    ListTable: () => import('@/components/Membership/ListTable')
  },data() {
    return {
      currPage: 1,listData: [],form: {
        mid: '',name: '',birthdate: '',}
    }
  },mounted() {
    this.fetchData()
  },methods: {
    fetchData() {
      // get list data
      this.listData = ***
      .....
    },}
</script>

解决方法

首先，您需要将组件的键设置为keep-alive，这会在渲染的组件之间产生差异

<keep-alive>
      <router-view v-if="$route.meta.keepAlive" :key="$route.fullPath"></router-view>
</keep-alive>

第二，您应该将ListTable放置到另一个keep-alive中，以告知vue您也要存储呈现的组件

<keep-alive>
      <ListTable ref="childTable" :listdata="listData" :currpage="currPage" :key="currPage"/>
</keep-alive>