本文实例为大家分享了vue实现商城购物车功能的具体代码,供大家参考,具体内容如下
首先,先上最终的效果图 
效果并不是很好看,但是这不是重点。
首先,我们先看下布局:
<template>
 <div class="shopcar" id="demo04">
 <div class="header-title">
 <h3>购物车</h3>
 </div>
 <div class="car-list">
 <ul>
 <li class="car-item" v-for="(item,index) in good_list">
 <div class="input-block">
 <label class="input-label" :class="{active: item.is_selected}" :for="'car-checkbox-'+index" @click="select_one(index)"></label>
 </div>
 <div class="car-item-content">
 <div class="car-img">
 <img :src="item.img" />
 </div>
 <div class="car-cont">
 <h3>{{item.title}}</h3>
 <div class="cat-desc">
 <span v-for="spec in item.spec_item">{{spec}}</span>
 </div>
 </div>
 <div class="num">
 <span @click="reduce(index)">-</span>
 <span>{{item.num}}</span>
 <span @click="add(index)">+</span>
 </div>
 <div class="car-price">
 <span class="car-price">¥{{item.price}}</span>
 <span class="car-num">X{{item.num}}</span>
 </div>
 </div>
 </li>
 </ul>
 </div>
 <div class="car-footer">
 <div class="foot-car">
 <label for="foot-check" class="input-label" :class="{active: selected_all}" @click="slect_all"></label>
 </div>
 <div class="total-cont">
 <span>总价:{{totalPrice}}</span>
 <span>共{{totalNum}}件</span>
 </div>
 <div class="btn-box">
 <button>立即下单</button>
 </div>
 </div>
 </div>
</template>
非常常见的布局,微商城购物车随处可见,先说明下,在这里,实现选中的功能并不是用传统的label+checkbox实现,而是一个单独的label,目的是为了简化dom结构,在传统的jq项目或者zepto项目中,一般会会这样写,主要是为了方便操作demo,但是vue项目完全不用考虑dom的操作,怎么方便怎么来就ok。
在加些简单的样式,
.header-title height 42px line-height 42px background #f5f5f5 border-bottom 1px solid #ddd .header-title h3 font-weight normal text-align center .car-list background #f2f2f2 margin-top 12px padding 8px .car-item border-bottom 1px solid #ddd position relative height 76px overflow hidden .car-checkbox display none .input-block width 30px float left height 55px line-height 55px .input-label cursor pointer position absolute width 18px height 18px top 18px left 0 background #fff border:2px solid #ccc border-radius 50% .input-label:after opacity 0 content '' position absolute width 9px height 5px background transparent top 6px left 6px border 2px solid #333 border-top none border-right none -webkit-transform rotate(-45deg) -moz-transform rotate(-45deg) -o-transform rotate(-45deg) -ms-transform rotate(-45deg) transform rotate(-45deg) .car-img width px height px float left overflow hidden .car-img img width 100% .input-label.active background #F15A24 .car-cont margin-left 100px .car-cont h3 font-weight normal line-height 24px font-size 14px .car-price position absolute right 12px bottom 0px width 40px height 40px text-align right .car-price span display block height 24px line-height 24px width 100% .car-footer height 60px background #f5f5f5 position fixed bottom 0 left 0 right 0 .foot-car width 42px height 60px float left margin-left 12px position relative .total-cont height 60px line-height 60px font-size 16px float left .total-cont span display inline-block margin-left 12px .btn-box float right height 60px line-height 60px .btn-box button height 100% width: 100px border none background #F15A24 color #fff font-size 16px .num position absolute top 28px right 25px width 120px .num span display inline-block width 28px height 28px float left text-align center line-height 28px border 1px solid #ddd font-size 14px
最近在学习stylus的使用,所以,就当做练习了。 
接下就是javascript了。
export default {
 data () {
 return {
 good_list: [
 {
 title: 'Apple iPhone 6s 16GB 玫瑰金色 移动联通电信4G手机',
 img: "http://sc.tywebs.cn/public/upload/goods/2017/04-27/a767693b9a84747f25335f0e33d3d380.jpg",
 num: 2,
 price: 6070.00,
 spec_item:[
 '内存:16G',
 '网络:4G',
 '颜色:玫瑰金'
 ],
 is_selected: false
 },{
 title: 'Apple iPhone 6s 32GB 玫瑰金色 移动联通电信4G手机',
 img: 'http://sc.tywebs.cn/public/upload/goods/2017/04-27/a767693b9a84747f25335f0e33d3d380.jpg',
 num: 2,
 price: 4570.00,
 spec_item:[
 '内存:32G',
 '网络:4G',
 '颜色:玫瑰金'
 ],
 is_selected: true
 },{
 title: 'Apple iPhone 6s 8GB 玫瑰金色 移动联通电信4G手机',
 img: 'http://sc.tywebs.cn/public/upload/goods/2017/04-27/a767693b9a84747f25335f0e33d3d380.jpg',
 num: 2,
 price: 4870.00,
 spec_item:[
 '内存:8G',
 '网络:4G',
 '颜色:玫瑰金'
 ],
 is_selected: false
 },{
 title: 'Apple iPhone 6s 128GB 玫瑰金色 移动联通电信4G手机',
 img: 'http://sc.tywebs.cn/public/upload/goods/2017/04-27/a767693b9a84747f25335f0e33d3d380.jpg',
 num: 2,
 price: 10568.00,
 spec_item:[
 '内存:128G',
 '网络:4G',
 '颜色:玫瑰金'
 ],
 is_selected: true
 },
 ],
 totalPrice: 0,
 totalNum: 0,
 selected_all: false
 }
 },
 mounted: function () {
 this.getTotal();
 },
 watch: {
 'good_list': {
 handler: function (val, oldVal) {
 // console.log(val)
 return val;
 },
 deep: true
 }
 },
 methods: {
 getTotal () {
 this.totalPrice = 0
 this.totalNum = 0
 for (var i = 0; i < this.good_list.length; i++) {
 var _d = this.good_list[i]
 if(_d.is_selected){
 this.totalPrice += _d['price'] * _d['num']
 this.totalNum +=_d['num']
 }
 }
 },
 select_one (index) {
 if(this.good_list[index].is_selected == true){
 this.good_list[index].is_selected = false
 }else{
 this.good_list[index].is_selected = true
 }
 this.getTotal()
 },
 slect_all () {
 if(this.selected_all){
 for (var i = 0; i < this.good_list.length; i++) {
 this.good_list[i].is_selected = false;
 }
 this.selected_all = false 
 }else{
 for (var i = 0; i < this.good_list.length; i++) {
 this.good_list[i].is_selected = true;
 }
 this.selected_all = true 
 }
 this.getTotal()
 },
 reduce (index) {
 if(this.good_list[index].num <= 1) return;
 this.good_list[index].num --
 this.getTotal()
 },
 add (index) {
 this.good_list[index].num ++
 this.getTotal()
 }
 }
 }
这里用mock数据来代替后台请求数据的动作,为了方便测试,逻辑比较简单,首先getTotal这个方法用来计算选中的item的数量以及总价,select_one用来处理单个选中的逻辑,slect_all 用来处理全部选中以及全部取消选中的操作,reduce用来处理处理减操作,顾名思义add用来处理加的操作。当然在真实的开发中,还会有校验库存的动作,每次加减都要校验库存。数据处理也会更复杂,但是闻琴弦而知雅意,器原理都是相通的。
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