vue a-table合并单元格并且写入选择框

整体实现效果图是这样

只写了合并部分列的代码

// columns 是a-table列表的表头及参数
columns: [
     {
        title: "资源等级",
        dataIndex: "sourceLevel",
        width: 160,
        key: "sourceLevel",
        align: "center",
        scopedSlots: {
          customRender: 'sourceLevel' // 写了sourceLevel这个我们仍可以在html上面写插槽来写入选择框
        },
        customCell: (record, rowIndex) => {
          return this.mergeCellsSlot(record, rowIndex); // this.mergeCellsSlot 下面有合并行的具体代码
        },
      },
      {
        title: "系数",
        dataIndex: "coefficient",
        width: 70,
        key: "coefficient",
        align: "center",
        customRender(_, row) {
          return {
            children: row.coefficient,
            attrs: {
              rowSpan: row.coefficientRowSpan
            }
          };
        }
      }
    ]

2.上面插槽的写法

下拉框change事件

    // select 框 change
    workingHoursOnChangeSelect($event, rowKey, colName, val) {
      const newData = [...this.tabularData];
      const target = newData.filter(item => rowKey === item.key)[0];
      if (target) {
        target[val] = $event;
        this.tabularData = newData;
      }
    },

这两个合并的方法都可以写上

    _this.rowSpan("age");
    _this.rowSpan("Resource");
    _this.rowSpan("dailyPrice");
    _this.rowSpan("sourceLevel");
    _this.rowSpan("coefficient");


    // 合并
    rowSpan(key) {
      const arr = this.tabularData
        .reduce((result, item) => {
          if (result.indexOf(item[key]) < 0) {
            result.push(item[key]);
          }
          return result;
        }, [])
        .reduce((result, keys) => {
          const children = this.tabularData.filter(item => item[key] === keys);
          result = result.concat(children.map((item, index) => ({...item, [`${key}RowSpan`]: index === 0 ? children.length : 0})));
          return result;
        }, []);
      this.tabularData = arr;
    },

这个是合并单元格的具体代码

    // 合并单元格
    mergeCellsSlot(record, rowIndex) {
      // 开始下标
      const index = this.tabularData.findIndex((item) => item.id === record.id);
      // 需要合并的单元格数
      let rowSpanNum = 0;
      this.tabularData.forEach((item) => {
        if (item.id === record.id) {
          rowSpanNum++;
        }
      });
      // 结束下标
      const indexIdLength = index + rowSpanNum;
      return {
        style: { display: index < rowIndex && rowIndex < indexIdLength ? "none" : undefined },
        attrs: { rowSpan: rowIndex === index ? rowSpanNum : 1 }
      };
    }

1.具体实现逻辑就是在设置table表头加上内容的插槽和合并单元格的函数，
2.在上面插槽下拉框要绑定table循环的值，不然会选不中内容
3.给合并的单元格赋值可以通过table数组[下标]来赋值