layout—模块静态模版搭建

一般情况下我们会有nav区域，header区域，二级路由出口区域以及footer区域，如图

我们在开发的时候先把大模块搭建起来，再一步一步填充小模块

在layout下建文件，目录如下

在index.vue中把上面文件引入进来

<script setup>
import LayoutNav from './components/LayoutNav.vue'
import LayoutHeader from './components/LayoutHeader.vue'
import LayoutFooter from './components/LayoutFooter.vue'
</script>

<template>
  <LayoutNav />
  <LayoutHeader />
  <RouterView />
  <LayoutFooter />
</template>

layout—字体图标引入

阿里的字体图标库支持多种引入方式，项目里采用的是font-class引用的方式
index.html

  <link rel="stylesheet" href="//at.alicdn.com/t/font_2143783_iq6z4ey5vu.css">

layout— 一级导航渲染

apis/layout.js

//导入封装好的http请求 可以看上一章发布的内容项目起步
import httpInstance from "@/utils/http"
export function getCategoryAPI () {
  return httpInstance({
    url: '/home/category/head'
  })
}

layout/layoutHeader

<script setup>
  import { getCategoryAPI } from '@/apis/layout'
  import { onMounted, ref } from 'vue'

  const categoryList = ref([])
  const getCategory = async () => {
    const res = await getCategoryAPI()
    categoryList.value = res.result
  }

  onMounted(() => getCategory())

</script>

<template>
  <header class='app-header'>
    <div class="container">
      <h1 class="logo">
        <RouterLink to="/">小兔鲜</RouterLink>
      </h1>
      <ul class="app-header-nav">
        <li class="home" v-for="item in categoryList" :key="item.id">
          <RouterLink to="/">{{ item.name }}</RouterLink>
        </li>
      </ul>
      <div class="search">
        <i class="iconfont icon-search"></i>
        <input type="text" placeholder="搜一搜">
        </div>
      <!-- 头部购物车 -->
    </div>
  </header>
</template>

layout—吸顶导航交互实现

需求:浏览器在上下滚动的过程中,如果距离顶部的滚动距离大于78px,吸顶导航显示，小于78px隐藏

安装vueuse插件

npm i @vueuse/core
//用里面的useScorll来解决滚动问题

layout/components/layoutFixed.vue

<script setup>
import LayoutHeaderUl from './LayoutHeaderUl.vue'
// vueUse
import { useScroll } from '@vueuse/core'
const { y } = useScroll(window)
</script>
<template>
  <div class="app-header-sticky" :class="{ show: y > 78 }">
    <div class="container">
      <RouterLink class="logo" to="/" />
      <!-- 导航区域 -->
      <ul class="app-header-nav ">
        <li class="home">
          <RouterLink to="/">首页</RouterLink>
        </li>
        <li>
          <RouterLink to="/">居家</RouterLink>
        </li>
        <li>
          <RouterLink to="/">美食</RouterLink>
        </li>
        <li>
          <RouterLink to="/">服饰</RouterLink>
        </li>
        <li>
          <RouterLink to="/">母婴</RouterLink>
        </li>
        <li>
          <RouterLink to="/">个护</RouterLink>
        </li>
        <li>
          <RouterLink to="/">严选</RouterLink>
        </li>
        <li>
          <RouterLink to="/">数码</RouterLink>
        </li>
        <li>
          <RouterLink to="/">运动</RouterLink>
        </li>
        <li>
          <RouterLink to="/">杂项</RouterLink>
        </li>
      </ul>

      <div class="right">
        <RouterLink to="/">品牌</RouterLink>
        <RouterLink to="/">专题</RouterLink>
      </div>
    </div>
  </div>
</template>


<style scoped lang='scss'>
.app-header-sticky {
  width: 100%;
  height: 80px;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  background-color: #fff;
  border-bottom: 1px solid #e4e4e4;
  // 此处为关键样式!!!
  // 状态一：往上平移自身高度 + 完全透明
  transform: translateY(-100%);
  opacity: 0;

  // 状态二：移除平移 + 完全不透明
  &.show {
    transition: all 0.3s linear;
    transform: none;
    opacity: 1;
  }

  .container {
    display: flex;
    align-items: center;
  }

  .logo {
    width: 200px;
    height: 80px;
    background: url("@/assets/images/logo.png") no-repeat right 2px;
    background-size: 160px auto;
  }

  .right {
    width: 220px;
    display: flex;
    text-align: center;
    padding-left: 40px;
    border-left: 2px solid $xtxColor;

    a {
      width: 38px;
      margin-right: 40px;
      font-size: 16px;
      line-height: 1;

      &:hover {
        color: $xtxColor;
      }
    }
  }
}

.app-header-nav {
  width: 820px;
  display: flex;
  padding-left: 40px;
  position: relative;
  z-index: 998;

  li {
    margin-right: 40px;
    width: 38px;
    text-align: center;

    a {
      font-size: 16px;
      line-height: 32px;
      height: 32px;
      display: inline-block;

      &:hover {
        color: $xtxColor;
        border-bottom: 1px solid $xtxColor;
      }
    }

    .active {
      color: $xtxColor;
      border-bottom: 1px solid $xtxColor;
    }
  }
}
</style>

layout/index.vue

//导入
import LayoutFixed from './components/LayoutFixed.vue'

layout— Pinia优化重复请求

项目中有两种导航，一种普通导航一种吸顶导航


stores/category.js

import { ref } from 'vue'
import { defineStore } from 'pinia'
import { getCategoryAPI } from '@/apis/layout'
export const useCategoryStore = defineStore('category', () => {
  // 导航列表的数据管理
  // state 导航列表数据
  const categoryList = ref([])

  // action 获取导航数据的方法
  const getCategory = async () => {
    const res = await getCategoryAPI()
    categoryList.value = res.result
  }

  return {
    categoryList,
    getCategory
  }
})

layout/index.vue

// 触发获取导航列表的action

import { useCategoryStore } from '@/stores/categoryStore'
import { onMounted } from 'vue'

const categoryStore = useCategoryStore()

onMounted(() => categoryStore.getCategory())

layout/components/layoutNav

// 触发获取导航列表的action
<script setup>
import { useCategoryStore } from '@/stores/categoryStore'
const categoryStore = useCategoryStore()
</script>

<template>
  <ul class="app-header-nav">
    <li class="home">
      <RouterLink to="/">首页</RouterLink>
    </li>
    <li class="home" v-for="item in categoryStore.categoryList" :key="item.id">
      <RouterLink active-class="active" :to="`/category/${item.id}`">
        {{ item.name }}
      </RouterLink>
    </li>
  </ul>
</template>


<style lang="scss">
.app-header-nav {
  width: 820px;
  display: flex;
  padding-left: 40px;
  position: relative;
  z-index: 998;

  li {
    margin-right: 40px;
    width: 38px;
    text-align: center;

    a {
      font-size: 16px;
      line-height: 32px;
      height: 32px;
      display: inline-block;

      &:hover {
        color: $xtxColor;
        border-bottom: 1px solid $xtxColor;
      }
    }

    .active {
      color: $xtxColor;
      border-bottom: 1px solid $xtxColor;
    }
  }
}
</style>