vue-insagent-pc/src/views/NavBar/NavBar.vue

<template>
  <div class="menu-bar-container">
    <!-- logo -->
    <div
      class="logo flex a-c j-c"
      :style="{'background-color':themeColor}"
      :class="collapse?'menu-bar-collapse-width':'menu-bar-width'"
      @click="$router.push('/')"
    >
      <img v-if="collapse" src="@/assets/image/logo.png" />
      <div v-if="!collapse" class="flex j-c a-c">
        <img src="@/assets/image/logo.png" />
        <span>{{appName}}</span>
      </div>
    </div>
    <!-- 导航菜单 -->
    <el-menu
      ref="navmenu"
      :default-active="menuIndex"
      :class="collapse?'menu-bar-collapse-width':'menu-bar-width'"
      :collapse="collapse"
      :collapse-transition="false"
      :unique-opened="true"
      @open="handleopen"
      @close="handleclose"
      @select="handleselect"
      background-color="#393D49"
      text-color="#fff"
      active-text-color="#fff"
    >
      <!-- 导航菜单树组件，动态加载菜单 -->
      <menu-tree v-for="item in leftTree" :key="item.id" :menu="item"></menu-tree>
    </el-menu>
  </div>
</template>
<script>
import { mapState } from "vuex";
import MenuTree from "@/components/MenuTree";
export default {
  components: {
    MenuTree
  },
  computed: {
    ...mapState({
      appName: state => state.app.appName,
      themeColor: state => state.app.themeColor,
      collapse: state => state.app.collapse,
      navTree: state => state.menu.navTree,
      leftTree: state => state.menu.leftTree
    }),
    mainTabs: {
      get() {
        return this.$store.state.tab.mainTabs;
      },
      set(val) {
        this.$store.commit("updateMainTabs", val);
      }
    },
    mainTabsActiveName: {
      get() {
        return this.$store.state.tab.mainTabsActiveName;
      },
      set(val) {
        this.$store.commit("updateMainTabsActiveName", val);
      }
    }
  },
  watch: {
    $route: "handleRoute"
  },
data(){
  return{
    menuIndex: this.$route.meta.index!==0?this.$route.meta.index:this.leftTree[0].id
  }
},
  created() {
    this.handleRoute(this.$route);

  },
  methods: {
    handleopen() {},
    handleclose() {},
    handleselect(a, b) {},
    // 路由操作处理
    handleRoute(route) {
      // tab标签页选中, 如果不存在则先添加
      var tab = this.mainTabs.filter(item => item.name === route.name)[0];
      if (!tab) {
        tab = {
          name: route.name,
          title: route.name,
          icon: route.meta.icon
        };
        this.mainTabs = this.mainTabs.concat(tab);
      }
      this.mainTabsActiveName = tab.name;
      // 切换标签页时同步更新高亮菜单
      if (this.$refs.navmenu != null) {
        this.$refs.navmenu.activeIndex = "" + route.meta.index;
        this.$refs.navmenu.initOpenedMenu();
      }
    }
  }
};
</script>

<style scoped lang="scss">
.menu-bar-container {
  position: fixed;
  top: 0px;
  left: 0;
  bottom: 0;
  z-index: 1020;
  .el-menu {
    position: absolute;
    top: 60px;
    bottom: 0px;
    text-align: left;
  }

  .logo {
    position: absolute;
    top: 0px;
    height: 60px;
    line-height: 60px;
    background: #545c64;
    cursor: pointer;
    img {
      width: 40px;
      height: 40px;
      border-radius: 0px;
      margin-right: 10px;
      float: left;
    }
    div {
      font-size: 25px;
      color: white;
      text-align: left;
    }
  }

  .menu-bar-width {
    width: 220px;
    overflow-y: auto;

  }
  .menu-bar-collapse-width {
    width: 65px;
  }
}
</style>