vue合并单元格合并--多列

一.多列合并

1.在el-table中添加:span-method="objectSpanMethod"属性来控制合并单元格，如下图

2.合并代码，每一列都要设置一个不同的key，这样可以防止合并的时候上下内容一样导致错误的问题

objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0) {
        if (this.myObj[row.channel_type].start === rowIndex) {
          return {
            rowspan: this.myObj[row.channel_type].step,
            colspan: 1
          };
        } else {
          return {
            rowspan: 0,
            colspan: 0
          };
        }
      }
      if (columnIndex === 1) {
        if (
          this.myObj_two[row.channel_name_chinese + row.channel_type].start ===
          rowIndex
        ) {
          return {
            rowspan: this.myObj_two[row.channel_name_chinese + row.channel_type]
              .step,
            colspan: 1
          };
        } else {
          return {
            rowspan: 0,
            colspan: 0
          };
        }
      }
    },
      // 合并单元格第一列
    resolveData(arr) {
      var obj = {};
      arr.forEach((val, key) => {
        if (!obj[val.channel_type]) {
          obj[val.channel_type] = {
            start: key,
            step: 1
          };
        } else {
          obj[val.channel_type].step++;
        }
      });
      this.myObj = obj;
      console.log(obj);
    },
    // 合并单元格第二列
    resolveData_two(arr) {
      var obj = {};
      arr.forEach((val, key) => {
        if (!obj[val.channel_name_chinese + val.channel_type]) {
          obj[val.channel_name_chinese + val.channel_type] = {
            start: key,
            step: 1
          };
        } else {
          obj[val.channel_name_chinese + val.channel_type].step++;
        }
      });
      this.myObj_two = obj;
      console.log(this.myObj_two, "this.myObj");
    },

3.需要调用一下下面两个函数，data为你所获取的所有数据

	 this.resolveData_two(data);
         this.resolveData(data);

4.合并结果如下图