一、功能效果

二、前端代码

购物车的vue代码

<template><van-nav-bar left-text="返回" title="购物车" @click-left="onClickLeft"><template #right><van-popover v-model:show="showPopover" placement="bottom-end" :actions="actions" @select="onSelect"><template #reference><van-icon name="more-o" /></template></van-popover></template></van-nav-bar><van-checkbox-group v-model="selectProducts" @change="ckGropChange"><van-swipe-cell v-for="(item, index) in cartItems" :key="item.id"><van-row class="box"><van-col span="2" class="ck"> <van-checkbox :name="item"></van-checkbox></van-col><van-col span="22"><van-card :price="item.price" :desc="item.subName" :title="item.name" :thumb="item.img"><template #num><van-stepper v-model="item.qty" theme="round" button-size="22" @change="computeTotalPrice" /></template></van-card></van-col></van-row><template #right><van-button square text="删除" type="danger" class="delete-button" @click="del(item, index)" /></template></van-swipe-cell></van-checkbox-group><van-submit-bar :price="totalPrice" button-text="提交订单" @submit="onSubmit"><van-checkbox v-model="checkedAll">全选</van-checkbox></van-submit-bar>
</template>
<script setup lang="ts">
import { ref, onMounted, reactive, watch } from "vue";
import { useRoute, useRouter } from "vue-router";
import { productApi } from '@/api/index'
const selectProducts: any = ref([])
const totalPrice = ref(0)
const showPopover = ref(false)
const checkedAll = ref(false)
const cartItems = ref([{id: 1,productId: 108,img: 'https://fastly.jsdelivr.net/npm/@vant/assets/cat.jpeg',name: '胜者心法：资治通鉴成事之道',subName: '胜者心法：这是子标题',price: "2.00",qty: 1,checked: true},{id: 2,productId: 109,img: 'https://fastly.jsdelivr.net/npm/@vant/assets/cat.jpeg',name: '认知破局 怎样突破能力、视野和思维的局限',subName: '胜者心法：这是子标题',price: "3.00",qty: 2,checked: false}
])
const actions = [{ text: '清空所有', id: 1 },{ text: '清空所选', id: 2 },{ text: '选项三' },
];
onMounted(() => {selectProducts.value = cartItems.value.filter(item => item.checked == true)if (cartItems.value.length == selectProducts.value.length) {checkedAll.value = true}computeTotalPrice()
})const onSelect = (action) => {if (action.id == 1) {//呼叫清空购物车清空接口cartItems.value = []selectProducts.value = []}};
const ckGropChange = () => {computeTotalPrice()if (cartItems.value.length == selectProducts.value.length) {checkedAll.value = true}if (selectProducts.value.length == 0) {checkedAll.value = false}
}const computeTotalPrice = () => {let total_Price = 0selectProducts.value.forEach((item: any) => {total_Price += item.qty * item.price});totalPrice.value = total_Price * 100
}watch(() => checkedAll.value, (newValue, oldValue) => {if (newValue) {selectProducts.value = cartItems.value} else {selectProducts.value = []}})
const del = (item: any, index: number) => {//呼叫接口，从用户购物车里面删除这个商品  item.productIdcartItems.value.splice(index, 1)selectProducts.value = selectProducts.value.filter((it: any) => it.id != item.id)if (cartItems.value.length == selectProducts.value.length) {checkedAll.value = true}if (selectProducts.value.length == 0) {checkedAll.value = false}
}
const onSubmit = () => {console.log(selectProducts.value);
};const onClickLeft = () => history.back();</script><style scoped>
.delete-button {height: 100%;
}.ck {display: flex;justify-content: center;align-items: center;
}.box {border-radius: 15px;margin: 5px 10px 5px 10px;background-color: #fff;
}.van-card {background-color: #fff;border-radius: 15px;
}
</style>