027：vue中两列表数据联动，购物车添加、删除和状态更改

雨点打透心脏的1/2处 2024-03-26 23:22 37阅读 0赞

![在这里插入图片描述][32d2a1d099334cfba6adc4f84dd79e22.png_pic_center]

第027个

查看专栏目录: [VUE][] \------ [element UI][]

### 专栏目标 ###

在vue和element UI联合技术栈的操控下，本专栏提供行之有效的源代码示例和信息点介绍，做到灵活运用。

> （1）提供vue2的一些基本操作：安装、引用，模板使用，computed，watch，生命周期(beforeCreate，created,beforeMount，mounted, beforeUpdate，updated, beforeDestroy，destroyed，activated，deactivated，errorCaptured，components，)、 $root , $parent , $children , $slots , $refs , props, $emit , eventbus ,provide / inject, Vue.observable, $listeners, $attrs, $nextTick , v-for, v-if, v-else,v-else-if，v-on，v-pre，v-cloak，v-once，v-model， v-html, v-text, keep-alive，slot-scope， filters, v-bind，.stop, .native, directives，mixin，render，国际化，Vue Router等

> （2）提供element UI的经典操作：安装，引用，国际化，el-row，el-col，el-button，el-link，el-radio，el-checkbox ，el-input，el-select, el-cascader, el-input-number, el-switch,el-slider, el-time-picker, el-date-picker, el-upload, el-rate, el-color-picker, el-transfer, el-form, el-table, el-tree, el-pagination,el-badge,el-avatar,el-skeleton, el-empty, el-descriptions, el-result, el-statistic, el-alert, v-loading, $message, $alert, $prompt, $confirm , $notify, el-breadcrumb, el-page-header,el-tabs ,el-dropdown,el-steps,el-dialog, el-tooltip, el-popover, el-popconfirm, el-card, el-carousel, el-collapse, el-timeline, el-divider, el-calendar, el-image, el-backtop，v-infinite-scroll， el-drawer等

#### 本文章目录 ####

*   *  专栏目标
     *  需求背景
     *  示例效果
     *  示例源代码（共135行）
     *  核心代码

### 需求背景 ###

本示例是演示两个列表的互动的场景，模仿购物车添加、删除商品的状态. 如果商品添加到购物车上，则显示已加入购物车，否则显示未加入购物车； 购物车中的商品，可以删除，同时更改商品列表的状态。 本文用到了array的改写，添加，删除等方法。

### 示例效果 ###

![在这里插入图片描述][e06fa517438d4c43800b6253f55194c1.gif_pic_center]

### 示例源代码（共135行） ###

/*
    * @Author: 大剑师兰特（xiaozhuanlan），还是大剑师兰特（CSDN）
    * @此源代码版权归大剑师兰特所有，可供学习或商业项目中借鉴，未经授权，不得重复地发表到博客、论坛，问答，git等公共空间或网站中。
    * @Email: 2909222303@qq.com
    * @weixin: gis-dajianshi
    * @First published in CSDN
    * @First published time: 2022-09-06
    */
    
    <template>
    	<div class="container">
    		<div class="top">
    			<h3>商品列表与购物车列表，数据联动 </h3>
    			<div class="author">大剑师兰特, 还是大剑师兰特，gis-dajianshi</div>
    		</div>
    
    		<h5>商品列表</h5>
    		<div class="oneLine" v-for="(item,index) in productList" :key="index">
    			<div class="fl20"><img :src="item.thumbnail_pic_s" alt=""></div>
    			<div class="fl20">{
        {
        item.title}} </div>
    			<div class="fr20">
    				<el-link type="danger" v-show="!item.cart" @click="addCart(index)">未加入购物车</el-link>
    				<el-link type="default" v-show="item.cart" @click="removeCart(index,item.title)">已加入购物车</el-link>
    			</div>
    		</div>
    
    
    		<h5>购物车列表</h5>
    		<div v-for="(item,index) in cartList" :key="item.index" class="oneLine">
    			<div class="fl20"><img :src="item.thumbnail_pic_s" alt=""></div>
    			<div class="fl20">{
        {
        item.title}} </div>
    			<div class="fr20">
    				<el-link type="danger" @click='delItem(index,item.title)'> 删除</el-link>
    			</div>
    		</div>
    	</div>
    </template>
    
    <script>
    	export default {
        
    		data() {
        
    			return {
        
    				cartList: [],
    				productList: []
    			}
    		},
    		methods: {
        
    			getdata() {
        
    				let url = "/listdata"
    				this.$request(url, {
        }, "GET")
    					.then((res) => {
        
    						this.productList = res.data.data
    					})
    			},
    
    			updateData() {
        
    				for (let i = 0; i < this.productList.length; i++) {
        
    					if (this.cartList.length > 0) {
        
    						let xx = this.productList[i].title;
    						this.cartList.some(item => {
        
    							if (item.title == xx) {
        
    								this.$set(this.productList[i], "cart", true);
    							}
    						})
    					}
    				}
    			},
    
    			addCart(x) {
        
    				console.log(this.productList[x])
    				this.cartList.unshift(this.productList[x])
    				this.updateData()
    			},
    			removeCart(x, y) {
        
    				this.cartList = this.cartList.filter((item) => {
        
    					return item.title != y
    				})
    				this.$set(this.productList[x], "cart", false);
    			},
    			delItem(i, d) {
        
    				this.cartList.splice(i, 1);
    
    				for (let i = 0; i < this.productList.length; i++) {
        
    					if (this.productList[i].title == d) {
        
    						this.$set(this.productList[i], "cart", false);
    					}
    				}
    
    			},
    
    		},
    		mounted() {
        
    			this.getdata();
    		},
    		updated() {
        
    			this.updateData()
    		},
    	}
    </script>
    <style scoped>
    	.container {
        
    		width: 1000px;
    		height: 580px;
    		margin: 50px auto;
    		border: 1px solid green;
    	}
    
    	.top {
        
    		margin: 0 auto 30px;
    		padding: 10px 0;
    		background: #cddeef;
    	}
    
    	.oneLine {
        
    		width: 100%;
    		height: 50px;
    		line-height: 50px;
    		background: #eee;
    		margin-top: 10px;
    		overflow: hidden;
    		cursor: pointer;
    		text-align: left;
    	}
    
    	.oneLine .fl20 {
        
    		float: left;
    		padding: 0 10px;
    		min-width: 150px;
    	}
    	.oneLine .fr20 {
        
    		float: right;
    		min-width: 50px;
    		padding-right: 15px;
    	}
    </style>

### 核心代码 ###

updateData() {
    				for (let i = 0; i < this.productList.length; i++) {
    					if (this.cartList.length > 0) {
    						let xx = this.productList[i].title;
    						this.cartList.some(item => {
    							if (item.title == xx) {
    								this.$set(this.productList[i], "cart", true);
    							}
    						})
    					}
    				}
    			},
    
    			addCart(x) {
    				console.log(this.productList[x])
    				this.cartList.unshift(this.productList[x])
    				this.updateData()
    			},
    			removeCart(x, y) {
    				this.cartList = this.cartList.filter((item) => {
    					return item.title != y
    				})
    				this.$set(this.productList[x], "cart", false);
    			},
    			delItem(i, d) {
    				this.cartList.splice(i, 1);
    
    				for (let i = 0; i < this.productList.length; i++) {
    					if (this.productList[i].title == d) {
    						this.$set(this.productList[i], "cart", false);
    					}
    				}
    
    			},

[32d2a1d099334cfba6adc4f84dd79e22.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/11/a8272e41369148fe9beb2b95c0de390c.png
[VUE]: https://blog.csdn.net/cuclife/article/details/131138955
[element UI]: https://blog.csdn.net/cuclife/article/details/131140113
[e06fa517438d4c43800b6253f55194c1.gif_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/11/ca9fcf5f1c9b4724bff0a7b1dc54a66c.png