vue-admin-template模板添加tagsview

参考：

https://github.com/PanJiaChen/vue-admin-template/issues/349

一、从vue-element-admin复制文件：

vue-admin-templatesrclayoutcomponentsTagsView  文件夹
vue-admin-templatesrcstoremodules agsView.js
#vue-admin-templatestatic 文件夹
#vue-admin-templatesrclang 文件夹
#vue-admin-templatesrcutilsi18n.js

二、修改 vue-admin-templatesrclayoutcomponentsAppMain.vue ：AppMain.vue文件，新增以下内容：

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

export default {
  name: 'AppMain',
  computed: {
    cachedViews() {
      return this.$store.state.tagsView.cachedViews
    }/*,
    key() {
      return this.$route.path
    }*/
  }
}

<style lang="scss" scoped>
.app-main {
  /*50 = navbar  */
  min-height: calc(100vh - 50px);
  width: 100%;
  position: relative;
  overflow: hidden;
}
.fixed-header + .app-main {
  padding-top: 50px;
}

.hasTagsView {
  .app-main {
    /* 84 = navbar + tags-view = 50 + 34 */
    min-height: calc(100vh - 84px);
  }

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

三、修改vue-admin-templatesrclayoutcomponentsindex.js，新增如下行：

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

四、vue-admin-templatesrclayoutindex.vue

<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
  },

五、修改 vue-admin-templatesrcstoregetters.js，增加：

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

六、修改 vue-admin-templatesrcstoreindex.js

import tagsView from './modules/tagsView'

const store = new Vuex.Store({
  modules: {
    app,
    permission,
    settings,
    tagsView,
    user
  },
  getters
})

七、修改 vue-admin-templatesrcmain.js

import i18n from './lang' // Internationalization

new Vue({
  el: '#app',
  router,
  store,
  i18n,
  render: h => h(App)
})

八、修改vue-admin-templatesrcsettings.js  添加

tagsView: true,

九、修改vue-admin-templatesrcstoremodulessettings.js

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

const state = {
  showSettings: showSettings,
  tagsView: tagsView,
  fixedHeader: fixedHeader,
  sidebarLogo: sidebarLogo
}

================================================

解决控制台报错：

1、删除vue-admin-templatesrclayoutcomponentsTagsViewindex.vue中routes方法

（因为没有用到权限校验）

 2、遍历标签时可能报错