uniapp 合并单元格

在uniapp中合并单元格，可以使用rowspan和colspan属性来实现。在代码中，可以通过设置rowspan和colspan的值来控制每个单元格的合并行数。举个例子，可以设置uni-th元素的rowspan属性为3来表示该单元格要合并3行，colspan属性为2来表示该单元格要合并2列。示例代码如下：

<uni-tr>
  <uni-th class="title" rowspan="3" align="center">尺寸</uni-th>
  <uni-th class="title" rowspan="2" colspan="2" align="center">基础价格</uni-th>
  <uni-th v-if="item.update_status" class="title" colspan="2" align="center">xxxxx</uni-th>
</uni-tr>
<uni-tr>
  <uni-th v-if="item.update_status" class="title red normal" colspan="2" align="center">xxxxx</uni-th>
</uni-tr>

通过设置rowspan和colspan属性，可以实现对单元格的合并操作。这样可以达到uniapp中合并单元格的效果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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