vue3 之商城项目—二级分类-编程知识

二级分类功能描述

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配置二级路由

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准备组件模版

<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>

配置路由关系

import { createRouter, createWebHashHistory } from 'vue-router'
import Layout from '@/views/Layout/index.vue'
import Home from '@/views/Home/index.vue'
import Category from '@/views/Category/index.vue'
import SubCategory from '@/views/SubCategory/index.vue'
const router = createRouter({history: createWebHashHistory(import.meta.env.BASE_URL),routes: [{path: '/',name: 'layout',component: Layout,children: [{path: '',name: 'home',component: Home},{path: 'category/:id',name: 'category',component: Category},{path: 'category/sub/:id',name: 'subCategory',component: SubCategory},]},{path: '/login',name: 'login',component: Login},]
})export default router

跳转配置

<div class="sub-list"><h3>全部分类</h3><ul><li v-for="i in categoryData.children" :key="i.id"><RouterLink :to="`/category/sub/${i.id}`"><img :src="i.picture" /><p>{{ i.name }}</p></RouterLink></li></ul>
</div>

二级分类面包屑导航实现

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准备接口

/*** @description: 获取二级分类列表数据* @param {*} id 分类id * @return {*}*/
export const getCategoryFilterAPI = (id) => {return request({url:'/category/sub/filter',params:{id}})
}

获取数据渲染模版

<script setup>
import { getCategoryFilterAPI } from '@/apis/category'
import { onMounted, ref } from 'vue'
import { useRoute } from 'vue-router'
// 获取面包屑导航数据
const categoryData = ref({})
const route = useRoute()
const getCategoryData = async () => {const res = await getCategoryFilterAPI(route.params.id)categoryData.value = res.result
}
onMounted(() => getCategoryData())
</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: `/category/${categoryData.parentId}` }">{{ categoryData.parentName }}</el-breadcrumb-item><el-breadcrumb-item>{{ categoryData.name }}</el-breadcrumb-item></el-breadcrumb></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>

二级分类商品列表实现

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基础参数获取基础列表

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准备接口

/*** @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})
}

获取数据列表

<script setup>// 获取基础列表数据渲染
const goodList = ref([])
const reqData = ref({categoryId: route.params.id,page: 1,pageSize: 20,sortField: 'publishTime'
})const getGoodList = async () => {const res = await getSubCategoryAPI(reqData.value)console.log(res)goodList.value = res.result.items
}onMounted(() => getGoodList())

    <!-- 商品列表--><GoodsItem v-for="goods in goodList" :goods="goods" :key="goods.id" />

列表筛选功能实现

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核心逻辑
点击tab，切换筛选条件参数sortField，重新发送列表请求

列表筛选实现

<script setup>
// tab切换回调
const tabChange = () => {console.log('tab切换了', reqData.value.sortField)reqData.value.page = 1getGoodList()
}
</script>
<template><el-tabs v-model="reqData.sortField" @tab-change="tabChange"><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>
</template>

列表无限加载功能实现

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核心实现逻辑
使用elementPlus提供的v-infinite-scroll指令监听是否满足触底条件，满足加载条件时让页数参数加一获取下一页数据，做新老数据拼接渲染

基础思路

触底条件满足之后 page++，拉取下一页数据
新老数据做数组拼接
判断是否已经全部加载完毕，停止监听

二级分类页面完整代码

<script setup>
import { getCategoryFilterAPI, getSubCategoryAPI } from '@/apis/category'
import { onMounted, ref } from 'vue'
import { useRoute } from 'vue-router'
import GoodsItem from '../Home/components/GoodsItem.vue'
// 获取面包屑导航数据
const categoryData = ref({})
const route = useRoute()
const getCategoryData = async () => {const res = await getCategoryFilterAPI(route.params.id)categoryData.value = res.result
}
onMounted(() => getCategoryData())// 获取基础列表数据渲染
const goodList = ref([])
const reqData = ref({categoryId: route.params.id,page: 1,pageSize: 20,sortField: 'publishTime'
})
const getGoodList = async () => {const res = await getSubCategoryAPI(reqData.value)console.log(res)goodList.value = res.result.items
}
onMounted(() => getGoodList())// tab切换回调
const tabChange = () => {console.log('tab切换了', reqData.value.sortField)reqData.value.page = 1getGoodList()
}// 加载更多
const disabled = ref(false)
const load = async () => {console.log('加载更多数据咯')// 获取下一页的数据reqData.value.page++const res = await getSubCategoryAPI(reqData.value)goodList.value = [...goodList.value, ...res.result.items]// 加载完毕 停止监听if (res.result.items.length === 0) {disabled.value = true}
}</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: `/category/${categoryData.parentId}` }">{{ categoryData.parentName }}</el-breadcrumb-item><el-breadcrumb-item>{{ categoryData.name }}</el-breadcrumb-item></el-breadcrumb></div><div class="sub-container"><el-tabs v-model="reqData.sortField" @tab-change="tabChange"><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" v-infinite-scroll="load" :infinite-scroll-disabled="disabled"><!-- 商品列表--><GoodsItem v-for="goods in goodList" :goods="goods" :key="goods.id" /></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>

二级分类定制路由scrollBehavior

定制路由行为解决什么问题
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
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// createRouter：创建router实例对象
// createWebHistory：创建history模式的路由import { createRouter, createWebHistory } from 'vue-router'
import Login from '@/views/Login/index.vue'
import Layout from '@/views/Layout/index.vue'
import Home from '@/views/Home/index.vue'
import Category from '@/views/Category/index.vue'
import SubCategory from '@/views/SubCategory/index.vue'const router = createRouter({history: createWebHistory(import.meta.env.BASE_URL),// path和component对应关系的位置routes: [{path: '/',component: Layout,children: [{path: '',component: Home},{path: 'category/:id',component: Category},{path: 'category/sub/:id',component: SubCategory},]},{path: '/login',component: Login}],// 路由滚动行为定制scrollBehavior () {return {top: 0}}
})export default router