vue3学习日记9 - 二级分类

最近发现职场前端用的框架大多为vue，所以最近也跟着黑马程序员vue3的课程进行学习，以下是我的学习记录

视频网址：

Day2-17.Layout-Pinia优化重复请求_哔哩哔哩_bilibili

学习日记：

vue3学习日记1 - 环境搭建-CSDN博客

vue3学习日记2 - 组合式API基础学习-CSDN博客

vue3学习日记3 - 组合式API练习小案例-CSDN博客

vue3学习日记4 - Pinia-CSDN博客

vue3学习日记5 - 项目起步-CSDN博客

vue3学习日记6 - Layout-CSDN博客

vue3学习日记7 - Home页面-CSDN博客

vue3学习日记8 - 一级分类-CSDN博客

一、路由配置

1、新建文件夹及文件

<script setup>

</script>
<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: '/' }">居家
        </el-breadcrumb-item>
        <el-breadcrumb-item>居家生活用品</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs>
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div class="body">
         <!-- 商品列表-->
      </div>
    </div>
  </div>
</template>

<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }
}
</style>

2、修改路由

3、修改Categorize中index.vue

4、运行截图

二、面包屑导航实现

1、新建文件

// 二级分类
import request from '@/utils/http'

// 获取二级分页数据
export function getCategoryFilterAPI(id){
    return request({
        url:'/category/sub/filter',
        params:{
            id
        }
    })
}

2、修改SubCategory文件夹下index.vue

<script setup>
import {getCategoryFilterAPI} from '@/apis/SubCategory'
import { onMounted, ref } from 'vue'
import { useRoute } from 'vue-router'
const categoryFilter = ref([])
const route = useRoute()
const getCategoryFilter = async () => {
    const res = await getCategoryFilterAPI( route.params.id)
    console.log(res)
    categoryFilter.value = res.result
}
onMounted(()=>getCategoryFilter())
</script>
<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/categorize/${categoryFilter.parentId}` }">{
  
  { categoryFilter.parentName }}</el-breadcrumb-item>
        <el-breadcrumb-item>{
  
  { categoryFilter.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs>
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div class="body">
         <!-- 商品列表-->
      </div>
    </div>
  </div>
</template>

3、运行截图

三、基础商品列表实现（传参data）

1、Subgategory.js，添加接口

/**
 * @description: 获取导航数据
 * @data { 
     categoryId: 1005000 ,
     page: 1,
     pageSize: 20,
     sortField: 'publishTime' | 'orderNum' | 'evaluateNum'
   } 
 * @return {*}
 */
export const getSubCategoryAPI = (data) => {
return request({
    url:'/category/goods/temporary',
    method:'POST',
    data
})
}

2、修改页面

<script setup>
import {getCategoryFilterAPI,getSubCategoryAPI} from '@/apis/SubCategory'
import { onMounted, ref } from 'vue'
import { useRoute } from 'vue-router'
import GoodItem from '@/views/Home/componments/GoodsItem.vue'
// 面包屑
const categoryFilter = ref([])
const route = useRoute()
const getCategoryFilter = async () => {
    const res = await getCategoryFilterAPI( route.params.id)
    console.log(res)
    categoryFilter.value = res.result
}
onMounted(()=>getCategoryFilter())
// 商品列表
const goodList = ref([])
const reqData = ref({ 
  categoryId: route.params.id ,
  page: 1,
  pageSize: 20,
  sortField: 'publishTime'
} )
const getSubCategory = async () => {
  const res = await getSubCategoryAPI(reqData.value)
  goodList.value = res.result
  console.log(goodList)
}
onMounted(()=>getSubCategory())
</script>
<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/categorize/${categoryFilter.parentId}` }">{
  
  { categoryFilter.parentName }}</el-breadcrumb-item>
        <el-breadcrumb-item>{
  
  { categoryFilter.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs>
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div class="body">
         <!-- 商品列表-->
         <GoodItem v-for=" item in goodList.items" :key="item.id" :good="item" />
      </div>
    </div>
  </div>
</template>

3、运行截图

四、列表筛选功能的实现

1、绑定方法和参数

// 切换按钮时调用 
const tabchange = () => { getSubCategory() }

3、运行结果（只要保证访问时参数不同即可，后台接口有问题，页面不会改变）

五、列表无限加载实现

1、核心实现逻辑

可以使用elementPlue提供的指令v-infinite-scroll监听是否满足触底雕件，满足条件时让页数参数加一获取下一页数据，做新老数据的拼接渲染

2、实践

六、定制路由行为

在不同路由切换的时候，可以自动滚动到页面的顶部，而不是停留在原先的位置