baiyuchengpin/pages/shopping/cart.vue

<template>
	<view class="content">
		<!-- 商品列表 -->
		<view class="goods-list">
			<view class="item" v-for="(item,index) in carts" :key="index">
				<label style="margin-right: 30upx;">
					<checkbox :value="item.checked"  :checked="item.checked" @click="checkChange(item)" />
				</label>
				<image class="goods-img" :src="item.productAttrImage==null||item.productAttrImage==''?item.productImage:item.productAttrImage" mode="aspectFit"></image>
				<view class="info-box">
					<view>
						<view class="title-box">
							<!-- <view class="tag">{{utils.getDictLabelName("storeProductType",item.productType)}}</view> -->
							<view class="title ellipsis">{{ item.productName }}</view>
						</view>
						<view class="intro ellipsis">{{item.productAttrName}}</view>
					</view>
					<view class="price-num">
						<view class="price">
							<text class="unit">¥</text>
							<text class="text">{{item.price}}</text>
						</view>
						<view class="num-box">
							<view class="img-box" @click="delNum(item)">
								<image v-if="item.cartNum <= 1" src="https://jnlzjk-1323137866.cos.ap-chongqing.myqcloud.com/shop/images/jian.png" mode=""></image>
								<image v-else src="https://jnlzjk-1323137866.cos.ap-chongqing.myqcloud.com/shop/images/jian2.png" mode=""></image>
							</view>
							<!-- <input  type="number" @change="changeNum($event,item)" :value="item.cartNum"   /> -->
							<input type="number" @focus="saveOriginalNum(item)" @blur="changeNum($event,item)" v-model="item.cartNum" />
							<view class="img-box" @click="addNum(item)">
								<image src="https://jnlzjk-1323137866.cos.ap-chongqing.myqcloud.com/shop/images/add.png" mode=""></image>
							</view>
						</view>
					</view>
				</view>
			</view>
		</view>
	 
		<view v-if="carts.length == 0" class="no-data-box">
			<image src="https://jnlzjk-1323137866.cos.ap-chongqing.myqcloud.com/shop/images/no_data.png" mode="aspectFit"></image>
			<view class="empty-title">暂无数据</view>
		</view>
		<!-- 猜你喜欢 -->
		 
	<!-- 	<view class="like-product">
			<likeProduct  ref="product" />
		</view> -->
		<!-- 底部按钮 -->
		<view class="btn-foot">
			<view class="left">
				<label>
					<checkbox  :checked="checkAll" @click="handleCheckAll()" />
				</label>
				<text class="text">全选</text>
				<text class="text" @click="delCart()">删除</text>
			</view>
			<view class="right">
				<view class="total">
					<text class="label">合计：</text>
					<view class="price">
						<text class="unit">¥</text>
						<text class="num">{{totalMoney.toFixed(2)}}</text>
					</view>
				</view>
				<view class="btn" @click="submit">结算</view>
			</view>
		</view>
		<CustomToast ref="customToast">
    </CustomToast>
	</view>
</template>

<script>
	import {getCarts,cartNum,delCart,checkCartPurchaseLimit} from '@/api/product'
	import likeProduct from '@/components/likeProduct.vue'
  import {CustomToast} from '@/components/custom-toast.vue';
	export default {
		components: {
			likeProduct,CustomToast
		},	
		data() {
			return {
				 
				totalMoney:0.00,
				carts:[],
				checkAll:false,
			}	
		},
		onLoad() {
			
 
		},
		onShow(){
			this.getCarts();
		},
		onReachBottom() {
			this.$refs.product.getGoodsProducts();
		},
		methods: {
			// 保存原始数量（在input获得焦点时）
			saveOriginalNum(item){
				// 在item对象上保存原始值（每次获得焦点时都保存）
				item._originalCartNum = item.cartNum;
			},
			delCart(){
				var selectCarts=this.carts.filter(ele => ele.checked==true).map(ele => {
				  return ele.id
				});
				if(selectCarts.length==0){
					uni.showToast({
						icon:'none',
						title: "请选择商品删除",
					});
					return;
				}
				let data = {ids:selectCarts};
				delCart(data).then(
					res => {
						if(res.code==200){
							// uni.showToast({
							// 	icon:'success',
							// 	title: "操作成功",
							// });
							this.getCarts()
						}else{
							
							uni.showToast({
								icon:'none',
								title: res.msg,
							});
						}
					},
					rej => {}
				);
				console.log(selectCarts)
			},
			computedMoney(){
				var money=0;
				var that=this;
				this.carts.forEach((item,index,arr)=>{
					 if(item.checked){
						 money+=item.price*item.cartNum;
					 }
				})
				this.totalMoney=money;
			},
			handleCheckAll(){
				this.checkAll=!this.checkAll;
				var that=this;
				this.carts.forEach((item,index,arr)=>{
				     item.checked=that.checkAll;
				})
				this.computedMoney();
			},
			checkChange(item){
				item.checked=!item.checked;
				this.checkAll = this.carts.every(item=>item.checked)
				this.computedMoney();
			},
			// changeNum(e,item) {
			// 	item.cartNum = e.detail.value.replace(/\D/g, '')
			// 	if (item.cartNum <= 1) {
			// 	  uni.showToast({
			// 	    title: "已经是底线啦!",
			// 	    icon: "none",
			// 	    duration: 2000
			// 	  });
			// 	  return;
			// 	}
			// 	if(item.cartNum < 1) {
			// 		item.cartNum = 1
			// 	}
			// 	if(item.cartNum>=item.stock){
			// 		item.cartNum=item.stock;
			// 	}
			// 	this.changeCartNum(item)
			// },
			changeCartNum(item, targetNum, originalNum){
				// targetNum: 目标数量
				// originalNum: 原始数量（用于失败时恢复）
				let data = {number:targetNum,id:item.id};
				cartNum(data).then(
					res => {
						if(res.code==200){
							// API成功，更新本地数量
							item.cartNum = targetNum;
							// 清除临时保存的原始值
							if(item._originalCartNum !== undefined){
								delete item._originalCartNum;
							}
							this.computedMoney();
							// uni.showToast({
							// 	icon:'none',
							// 	title: "操作成功",
							// });
						}else{
							// API失败，不更新数量（保持原值）
							// 确保显示的是原始值
							if(originalNum !== undefined){
								item.cartNum = originalNum;
							}
							// 清除临时保存的原始值
							if(item._originalCartNum !== undefined){
								delete item._originalCartNum;
							}
							this.$forceUpdate(); // 强制更新视图
              this.$refs.customToast.show({
                title: res.msg || '该商品限购，目前剩余可购买数量不足',
                duration: 2000
              });
							// uni.showToast({
							// 	icon:'none',
							// 	title: ,
							// });
						}
					},
					rej => {
						// 网络错误，不更新数量（保持原值）
						if(originalNum !== undefined){
							item.cartNum = originalNum;
						}
						// 清除临时保存的原始值
						if(item._originalCartNum !== undefined){
							delete item._originalCartNum;
						}
						this.$forceUpdate();
						uni.showToast({
							icon:'none',
							title: '网络错误，请重试',
						});
					}
				);
			},
			changeNum(e, item) {
			    // 获取原始数量（在focus时保存的）
			    let originalNum = item._originalCartNum !== undefined ? item._originalCartNum : item.cartNum;
			    let value = e.detail.value.replace(/\D/g, '')
			    
			    // 转换为数字
			    let num = parseInt(value)
			    
			    // 检查是否为有效数字
			    if (isNaN(num) || value === '') {
			        num = 1
			        uni.showToast({
			            title: "数量不能为0",
			            icon: "none",
			            duration: 2000
			        });
			    }
			    
			    // 限制最小值
			    if (num < 1) {
			        num = 1
			        uni.showToast({
			            title: "最小数量为1",
			            icon: "none",
			            duration: 2000
			        });
			    }
			    
			    // 限制最大值（库存）
			    if (num > item.stock) {
			        num = item.stock
			        uni.showToast({
			            title: "库存不足，已设为最大库存",
			            icon: "none",
			            duration: 2000
			        });
			    }
			    
			    // 如果目标数量与原始数量相同，不需要调用API，恢复显示
			    if(num === originalNum){
			        item.cartNum = originalNum;
			        delete item._originalCartNum; // 清除临时保存的值
			        return;
			    }
			    
			    // 先恢复原值（因为v-model已经改变了显示）
			    item.cartNum = originalNum;
			    // 调用API，根据结果决定是否更新
			    this.changeCartNum(item, num, originalNum)
			},
			getCarts(){
				getCarts().then(
					res => {
						if(res.code==200){
							 this.carts=res.carts;
							 this.carts.forEach((item,index,arr)=>{
							      item.checked=false;
							 })
							 this.computedMoney();
						}else{
							uni.showToast({
								icon:'none',
								title: "请求失败",
							});
						}
					},
					rej => {}
				);
			},
			// 购物车减法
			delNum(item) {
				if (item.cartNum <= 1) {
				  uni.showToast({
				    title: "已经是底线啦!",
				    icon: "none",
				    duration: 2000
				  });
				  return;
				}
				// 保存原始数量
				let originalNum = item.cartNum;
				// 计算目标数量
				let targetNum = originalNum - 1;
				if(targetNum < 1) {
					targetNum = 1;
				}
				// 先不更新本地数量，直接调用API，根据结果决定是否更新
				this.changeCartNum(item, targetNum, originalNum)
			},
			// 购物车加法
			addNum(item) {
				console.log(item)
				// 保存原始数量
				let originalNum = item.cartNum;
				// 计算目标数量
				let targetNum = originalNum + 1;
				if(targetNum >= item.stock){
					targetNum = item.stock;
				}
				// 先不更新本地数量，直接调用API，根据结果决定是否更新
				this.changeCartNum(item, targetNum, originalNum)
			},
			// 结算
			async submit() {
				var selectCarts=this.carts.filter(ele => ele.checked==true).map(ele => {
				  return ele.id
				});
				if(selectCarts.length==0){
					uni.showToast({
						icon:'none',
						title: "请选择商品",
					});
					return;
				}
				
				// 获取选中的商品信息，用于限购校验
				var selectedProducts = this.carts.filter(ele => ele.checked==true).map(ele => {
					return {
						productId: ele.productId,
						num: ele.cartNum
					}
				});
				
				// 结算前先校验限购
				try {
					const res = await checkCartPurchaseLimit({ products: selectedProducts });
					if (res.code !== 200) {
            this.$refs.customToast.show({
              title: res.msg || '商品限购校验失败',
              duration: 2000
            });
						// uni.showToast({
						// 	icon: 'none',
						// 	title: res.msg || '商品限购校验失败'
						// });
						return;
					}
				} catch (error) {
					console.error('检查限购失败:', error);
					uni.showToast({
						icon: 'none',
						title: '检查限购失败，请稍后重试'
					});
					return;
				}
				
				// 限购检查通过，进行跳转
				uni.navigateTo({
					url: './confirmOrder?type=cart&cartIds='+selectCarts.toString()
				})
			},
			showProduct(item){
				uni.navigateTo({
					url: '../shopping/productDetails?productId='+item.productId
				})
			},
		}
	}
</script>

<style lang="scss">
	page {
		height: 100%;
	}
	.content{
		height: 100%;
		padding: 20upx;
		.goods-list{
			.item{
				box-sizing: border-box;
				height: 221upx;
				background: #FFFFFF;
				border-radius: 16upx;
				margin-bottom: 20upx;
				padding: 30upx;
				display: flex;
				align-items: center;
				&:last-child{
					margin-bottom: 0;
				}
				.goods-img{
					width: 160upx;
					height: 160upx;
					background: #FFFFFF;
					margin-right: 30upx;
					flex-shrink: 0;
				}
				.info-box{
					height: 160upx;
					display: flex;
					flex-direction: column;
					justify-content: space-between;
					width: calc(100% - 255upx);
					.title-box{
						width: 100%;
						display: flex;
						align-items: center;
						.tag{
							padding: 0 6upx;
							height: 30upx;
							line-height: 30upx;
							font-size: 22upx;
							font-family: PingFang SC;
							font-weight: bold;
							color: #FFFFFF;
							background: linear-gradient(90deg, #66b2ef 0%, #2BC7B9 100%);
							border-radius: 4upx;
							margin-right: 10upx;
							flex-shrink: 0;
						}
						.title{
							flex: 1;
							font-size: 28upx;
							font-family: PingFang SC;
							font-weight: 500;
							color: #111111;
							line-height: 1;
						}
					}
					.intro{
						font-size: 24upx;
						font-family: PingFang SC;
						font-weight: 500;
						color: #999999;
						margin-top: 22upx;
						line-height: 1;
					}
					.price-num{
						display: flex;
						align-items: center;
						justify-content: space-between;
						.price{
							display: flex;
							align-items: flex-end;
							.unit{
								font-size: 24upx;
								font-family: PingFang SC;
								font-weight: 500;
								color: #FF6633;
								line-height: 1.2;
								margin-right: 4upx;
							}
							.text{
								font-size: 32upx;
								font-family: PingFang SC;
								font-weight: bold;
								color: #FF6633;
								line-height: 1;
							}
						}
						.num-box{
							display: flex;
							align-items: center;
							.img-box{
								width: 60upx;
								height: 60upx;
								// border-radius: 4upx;
								border: 1px solid #dddddd;
								display: flex;
								align-items: center;
								justify-content: center;
								image{
									width: 25rpx;
									height: 25rpx;
								}
							}
							input{
								width: 60upx;
								height: 60upx;
								line-height: 60upx;
								font-size: 28upx;
								font-family: PingFang SC;
								font-weight: 500;
								color: #111111;
								// border-radius: 4upx;
								border-top: 1px solid #dddddd;
								border-bottom: 1px solid #dddddd;
								text-align: center;
								// margin: 0 16upx;
							}
						}
					}
				}
			}
		}
		.like-product{
			padding-bottom: 120upx;
		}
		.btn-foot{
			box-sizing: border-box;
			width: 100%;
			height: 121upx;
			background: #FFFFFF;
			padding: 16upx 30upx 16upx 60upx;
			display: flex;
			align-items: center;
			justify-content: space-between;
			position: fixed;
			left: 0;
			bottom: 0;
			z-index: 99;
			.left{
				display: flex;
				align-items: center;
				.text{
					margin-left: 14upx;
					font-size: 28upx;
					font-family: PingFang SC;
					font-weight: 500;
					color: #666666;
					line-height: 1;
				}
			}
			.right{
				display: flex;
				align-items: center;
				.total{
					display: flex;
					align-items: flex-end;
					margin-right: 36upx;
					.label{
						font-size: 26upx;
						font-family: PingFang SC;
						font-weight: 500;
						color: #999999;
						line-height: 1.5;
					}
					.price{
						display: flex;
						align-items: flex-end;
						.unit{
							font-size: 32upx;
							font-family: PingFang SC;
							font-weight: bold;
							color: #FF6633;
							line-height: 1.2;
							margin-right: 10upx;
						}
						.num{
							font-size: 30upx;
							font-family: PingFang SC;
							font-weight: bold;
							color: #FF6633;
							line-height: 1;
						}
					}
				}
				.btn{
					width: 200upx;
					height: 88upx;
					line-height: 88upx;
					text-align: center;
					font-size: 30upx;
					font-family: PingFang SC;
					font-weight: bold;
					color: #FFFFFF;
					background: #2BC7B9;
					border-radius: 44upx;
				}
			}
		}
	}
</style>