页面展示：
实现效果：点击实现列表内容的展开、折叠。
<div class="invoice-list" v-for="(item,index) in invoiceData" :key="index">
<div class="images"><img src="../../../../../static/images/invoice_pu.png" v-if="item.invoiceType == '0'"><img src="../../../../../static/images/invoice_zhuan.png" v-else-if="item.invoiceType == '1'"></div>
<div class="text">
<h3 v-if="item.invoiceType == '0'">增值税普通发票</h3>
<h3 v-else-if="item.invoiceType == '1'">增值税专用发票</h3>
<p><span>企业名称：</span>{{item.enterpriseName}}</p>
<p><span>税号：</span>{{item.dutyParagraph}}</p>
<transition name="fade">
<div class="zhuanInfo" v-if="item.mark == true">
<p><span>注册地址：</span>{{item.address}}</p>
<p><span>联系电话：</span>{{item.contactNumber}}</p>
<p><span>开户银行：</span>{{item.accountOpeningBank}}</p>
<p><span>银行账号：</span>{{item.bankAccount }}</p>
</div>
</transition>
<div class="zhuanMark" v-if="item.invoiceType == '1'">
<p class="hideMark">
<img src="../../../../../static/images/arrow_bottom.png" v-if="item.mark == false" @click="clickZhuanMark(index,$event)">
<img src="../../../../../static/images/arrow_top.png" v-else @click="clickZhuanMark(index,$event)">
</p>
</div>
<div class="list-radio"><input type="radio" value="" name="selectContact" @change="getInvoiceId(item.invoiceId)" /></div>
</div>
</div>
v-for渲染出列表，在执行列表折叠展开时"clickZhuanMark" JS如下：
clickZhuanMark(val,event){
this.invoiceData[val].mark = !this.invoiceData[val].mark;
},
可是实际并没有如设想的那样实现效果，之后修改代码：
添加this.$forceUpdate();进行强制渲染，效果实现。搜索资料得出结果：因为数据层次太多，render函数没有自动更新，需手动强制刷新。