vue中使用vant-ui的popup>picker组件在ios中出现底部弹出层高度丢失问题

vant版本：2.12.29
ios设备：iPhone12真机调试

<div>
  <van-popup v-model="showPicker" position="bottom" :style="{height:'40%'}" get-container="myTicket">
    <div class="myTicket">
      <van-picker
        title="请选择保存方式"
        show-toolbar
        :columns="columns[columnType]"
        @confirm="onConfirm"
        @cancel="onCancel"
      />
    </div>
  </van-popup>
</div>

![image.png](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/3a9b382540904ea8952f3e7ff72d0ab0~tplv-k3u1fbpfcp-watermark.image?)

备注：get-container无论写什么值都无法生效，在iOS中真机调试