const idCardRule = (rule, value, callback) => {
   let reg = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/i
   if (value && !reg.test(value)) {
     callback(new Error('身份证号格式有误'))
   } else {
     callback()
 }

 //添加规则
 idCard:[{validator: idCardRule, trigger: 'blur'}]

 <u-table-column prop="idCard" label="身份证号码" align="center" min-width="160px">
     <template slot-scope="scope">
         <span>{
   
   {scope.row.idCard ? scope.row.idCard.replace(/^(.{6})(?:\w+)(.{4})$/, '\$1********\$2') : '--'}}</span>
     </template>
 </u-table-column>