app/pages/index/cart.vue

<template>
	<s-layout title="购物车" tabbar="/pages/index/cart" :bgStyle="{ color: '#fff' }">
		<s-empty v-if="state.list.length === 0" text="购物车空空如也,快去逛逛吧~" icon="/static/cart-empty.png" />

		<!-- 头部 -->
		<view class="cart-box ss-flex ss-flex-col ss-row-between" v-if="state.list.length">
			<view class="cart-header ss-flex ss-col-center ss-row-between ss-p-x-30">
				<view class="header-left ss-flex ss-col-center ss-font-26">
					共
					<text class="goods-number ui-TC-Main ss-flex">{{ state.list.length }}</text>
					件商品
				</view>
				<view class="header-right">
					<button v-if="state.editMode" class="ss-reset-button" @tap="state.editMode = false">
						取消
					</button>
					<button v-else class="ss-reset-button ui-TC-Main" @tap="state.editMode = true">
						编辑
					</button>
				</view>
			</view>
			<!-- 内容 -->
			<view class="cart-content ss-flex-1 ss-p-x-30 ss-m-b-40">
				<view class="goods-box ss-r-10 ss-m-b-14" v-for="item in state.list" :key="item.id">
					<view class="ss-flex ss-col-center">
						<label class="check-box ss-flex ss-col-center ss-p-l-10" @tap="onSelectSingle(item.id)">
							<radio :checked="state.selectedIds.includes(item.id)" color="var(--ui-BG-Main)"
								style="transform: scale(0.8)" @tap.stop="onSelectSingle(item.id)" />
						</label>
						<s-goods-item :title="item.spu.name" :img="item.spu.picUrl || item.goods.image"
							:price="item.sku.price"
							:skuText="item.sku.properties.length>1? item.sku.properties.reduce((items2,items)=>items2.valueName+' '+items.valueName):item.sku.properties[0].valueName"
							priceColor="#FF3000" :titleWidth="400">
							<template v-if="!state.editMode" v-slot:tool>
								<su-number-box :min="0" :max="item.sku.stock" :step="1" v-model="item.count" @change="onNumberChange($event, item)" />
							</template>
						</s-goods-item>
					</view>
				</view>
			</view>
			<!-- 底部 -->
			<su-fixed bottom :val="48" placeholder v-if="state.list.length > 0" :isInset="false">
				<view class="cart-footer ss-flex ss-col-center ss-row-between ss-p-x-30 border-bottom">
					<view class="footer-left ss-flex ss-col-center">
						<label class="check-box ss-flex ss-col-center ss-p-r-30" @tap="onSelectAll">
							<radio :checked="state.isAllSelected" color="var(--ui-BG-Main)"
								style="transform: scale(0.8)" @tap.stop="onSelectAll" />
							<view class="ss-m-l-8"> 全选 </view>
						</label>
						<text>合计：</text>
						<view class="text-price price-text">
							{{ fen2yuan(state.totalPriceSelected) }}
						</view>
					</view>
					<view class="footer-right">
						<button v-if="state.editMode" class="ss-reset-button ui-BG-Main-Gradient pay-btn ui-Shadow-Main"
							@tap="onDelete">
							删除
						</button>
						<button v-else class="ss-reset-button ui-BG-Main-Gradient pay-btn ui-Shadow-Main"
							@tap="onConfirm">
							去结算
							{{ state.selectedIds?.length ? `(${state.selectedIds.length})` : '' }}
						</button>
					</view>
				</view>
			</su-fixed>
		</view>
	</s-layout>
</template>

<script setup>
	import sheep from '@/sheep';
	import { computed, reactive } from 'vue';
  import { fen2yuan } from '../../sheep/hooks/useGoods';

	const sys_navBar = sheep.$platform.navbar;
	const cart = sheep.$store('cart');

	const state = reactive({
		editMode: false,
		list: computed(() => cart.list),
		selectedList: [],
		selectedIds: computed(() => cart.selectedIds),
		isAllSelected: computed(() => cart.isAllSelected),
		totalPriceSelected: computed(() => cart.totalPriceSelected),
	});

	// 单选选中
	function onSelectSingle(id) {
		cart.selectSingle(id);
	}

  // 全选
	function onSelectAll() {
		cart.selectAll(!state.isAllSelected);
	}

	// 结算
	function onConfirm() {
		let items = []
		let goods_list = [];
		state.selectedList = state.list.filter((item) => state.selectedIds.includes(item.id));
		state.selectedList.map((item) => {
			// 此处前端做出修改
			items.push({
				skuId: item.sku.id,
				count: item.count,
				cartId: item.id,
				categoryId: item.spu.categoryId
			})
			goods_list.push({
				// goods_id: item.goods_id,
				goods_id: item.spu.id,
				// goods_num: item.goods_num,
				goods_num: item.count,
				// 商品价格id真没有
				// goods_sku_price_id: item.goods_sku_price_id,
			});
		});
		// return;
		if (goods_list.length === 0) {
			sheep.$helper.toast('请选择商品');
			return;
		}
		sheep.$router.go('/pages/order/confirm', {
			data: JSON.stringify({
				items
			}),
		});
	}

	function onNumberChange(e, cartItem) {
		if (e === 0) {
			cart.delete(cartItem.id);
			return;
		}
		if (cartItem.goods_num === e) return;
		cartItem.goods_num = e;
		cart.update({
			goods_id: cartItem.id,
			goods_num: e,
			goods_sku_price_id: cartItem.goods_sku_price_id,
		});
	}
	async function onDelete() {
		cart.delete(state.selectedIds);
	}
</script>

<style lang="scss" scoped>
	:deep(.ui-fixed) {
		height: 72rpx;
	}

	.cart-box {
		width: 100%;

		.cart-header {
			height: 70rpx;
			background-color: #f6f6f6;
			width: 100%;
			position: fixed;
			left: 0;
			top: v-bind('sys_navBar') rpx;
			z-index: 1000;
			box-sizing: border-box;
		}

		.cart-footer {
			height: 100rpx;
			background-color: #fff;

			.pay-btn {
				width: 180rpx;
				height: 70rpx;
				font-size: 28rpx;
				line-height: 28rpx;
				font-weight: 500;
				border-radius: 40rpx;
			}
		}

		.cart-content {
			margin-top: 70rpx;

			.goods-box {
				background-color: #fff;
			}
		}
	}
</style>