vxe-table中vxe-grid中的合并单元格（合并行、列）

效果图（我所用到的是合并行）：根据personName人员名称相同合并行

<vxe-grid v-bind="gridOptions" ref="tableRefs"></vxe-grid>


// 列表表格数据
const gridOptions = ref({
  data: [],
  align: 'center',
  loading: false,
  border: true,
  height: '300px',
  columns: [
    { type: 'seq', width: 50 },
    {
      title: '人员名称',
      field: 'personName'
    },
    {
      title: '人员类型',
      field: 'typeName'
    },
    {
      title: '代垫公司',
      field: 'proxyOrgName'
    },
    {
      title: '开始时间',
      field: 'startTime'
    },
    {
      title: '结束时间',
      field: 'endTime'
    }
  ]
});
const getPage = async () => {
  gridOptions.value.loading = true;
  const res = await PersonnelTypeManagementApi.personHistory({
    pageNo: customMade.value.pageNo,
    pageSize: customMade.value.pageSize,
    orgId: rightOrgId.value,
    personId: props.rowData.personId
  });
  gridOptions.value.loading = false;
  gridOptions.value.data = res.data.rows;
  nextTick(() => { //必须在nextTick中请求，否则表格不会重新渲染
    updateMergeCells(res.data.rows);
  });
  customMade.value.total = res.data.totalRows;
};
// 合并规则
const updateMergeCells = tableData => {
  const merges = [];
  let prevPersonName = null;
  let count = 0;

  for (let rowIndex = 0; rowIndex < tableData.length; rowIndex++) {
    const currentRow = tableData[rowIndex];
    if (prevPersonName === currentRow.personName) {
      count++;
    } else {
      if (count > 0) {
        // 注意这里 row 是从 rowIndex - count 开始的
        merges.push({ row: rowIndex - count - 1, col: 1, rowspan: count + 1, colspan: 1 });
      }
      prevPersonName = currentRow.personName;
      count = 0;
    }
  }

  // 处理最后一组相同的 personName
  if (count > 0) {
    merges.push({ row: tableData.length - count - 1, col: 1, rowspan: count + 1, colspan: 1 });
  }

  if (tableRefs.value) {
    tableRefs.value.setMergeCells(merges);//设置合并
  }
};