vue单元格多列合并的实现

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