截取部分代码：
html:

<div id="right">
            <h3>购物列表<span>编辑</span></h3>
            <div v-for="(item,index) in purchase">
                <img v-bind:src="item.img">
                    <div class="setWidth" v-if="true">{{item.name}}</div>
                    <div class="setWidth">
                        <p>￥<em>{{item.price}}</em></p> <br/>
                        <p>库存件</p>
                        <p><span v-on:click="increaseGoods(index)">+</span><span >{{count}}</span><span v-on:click="decreGoods(index)">-</span></p>
                    </div>
                </div>
        </div>

js:

[图片上传失败...(image-8cec1c-1526545610661)]

methods:{
        addItem:function(index){
            this.purchase.push(this.lists[index])
            //console.log(this.count);  //1
            //console.log(this.purchase instanceof Array)  //true
        },

}