vue-element-admin 单页面转多标签页

转载自：www.cnblogs.com/windok/p/10…

一、复制文件：

从vue-element-admin 中复制到项目中去

vue-admin-template\src\layout\components\TagsView  文件夹 

vue-admin-template\src\store\modules\tagsView.js

二、文件修改

1. vue-admin-template\src\layout\components\AppMain.vue

修改如下：

<template>
  <section class="app-main">
    <transition name="fade-transform" mode="out-in">
      <!-- <router-view :key="key" />-->
      <keep-alive :include="cachedViews">
        <router-view :key="key" />
      </keep-alive>
    </transition>
  </section>
</template>

<script>
export default {
  name: 'AppMain',
  computed: {
    //需要缓存的页面 固钉
    cachedViews() {
      return this.$store.state.tagsView.cachedViews
    },
    key() {
      return this.$route.fullPath
    }
  }
}
</script>

<style lang="scss" scoped>
.hasTagsView {
  .app-main {
    /* 84 = navbar + tags-view = 50 + 34 */
    min-height: calc(100vh - 84px);
  }

  .fixed-header+.app-main {
    padding-top: 84px;
  }
}
</style>

<style lang="scss">
// fix css style bug in open el-dialog
.el-popup-parent--hidden {
  .fixed-header {
    padding-right: 15px;
  }
}
</style>

2.vue-admin-template\src\layout\components\index.js

新增如下行

export { default as TagsView } from './TagsView'

3. vue-admin-template\src\layout\index.vue

新增tagsview标签，如下

<template>
  <div :class="classObj" class="app-wrapper">
    <div v-if="device==='mobile'&&sidebar.opened" class="drawer-bg" @click="handleClickOutside" />
    <sidebar class="sidebar-container" />
    <div class="main-container">
      <div :class="{'fixed-header':fixedHeader}">
        <navbar />
      </div>
      <tags-view />    <!-- 此处增加tag-->
      <app-main />
    </div>
  </div>
</template>

import { Navbar, Sidebar, AppMain,TagsView } from './components'

components: {
    Navbar,
    Sidebar,
    AppMain,
    TagsView //新增
  },

4. vue-admin-template\src\store\getters.js

增加如下

visitedViews: state => state.tagsView.visitedViews,
cachedViews: state => state.tagsView.cachedViews,

5. vue-admin-template\src\store\index.js

修改如下

import tagsView from './modules/tagsView'

const store = new Vuex.Store({
  modules: {
    app,
    settings,
    tagsView, //此处新增
    user
  },
  getters
})

6.vue-admin-template\src\settings.js

添加配置如下

tagsView: true,

设置为根据值，是否选择加载。

7.vue-admin-template\src\store\modules\settings.js

修改如下

const { showSettings, fixedHeader, sidebarLogo,tagsView } = defaultSettings

const state = {
  showSettings: showSettings,
  tagsView: tagsView, //此处新增
  fixedHeader: fixedHeader,
  sidebarLogo: sidebarLogo
}

三、解决问题

1. 删除vue-admin-template\src\layout\components\TagsView\index.vue中routes方法（因为没有用到权限校验）

computed: {
    visitedViews() {
      return this.$store.state.tagsView.visitedViews
    }/*,
    routes() {
      return this.$store.state.permission.routes
    }*/
  },

2. 遍历标签时可能控制台报错

filterAffixTags(routes, basePath = '/') {
      let tags = []
      //判断是否为空，否则控制台会报错
      if(this.routes){
        routes.forEach(route => {
          if (route.meta && route.meta.affix) {
            const tagPath = path.resolve(basePath, route.path)
            tags.push({
              fullPath: tagPath,
              path: tagPath,
              name: route.name,
              meta: { ...route.meta }
            })
          }
          if (route.children) {
            const tempTags = this.filterAffixTags(route.children, route.path)
            if (tempTags.length >= 1) {
              tags = [...tags, ...tempTags]
            }
          }
        })
      }
      return tags
    },

3. 删除全部标签后，会跳到404页面，所以要固定一些版面是不允许删除的。

在meta中加上affix: true就能使它不可删除，例如：meta: { title: '首页', icon: 'dashboard', affix: true }

{
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    children: [{
      path: 'dashboard',
      name: 'Dashboard',
      component: () => import('@/views/dashboard/index'),
      meta: { title: '后台管理系统', icon: 'dashboard' , affix: true  }
    }]
  },

4. 如果右击标签刷新跳转404页面， 记得在vue-admin-template\src\views 目录下将redirecy复制进去