vue使用el-table动态合并列及行

getListDataForRowAndColumn(data){
            let self = this;
            self.rowAndColumn = [];
            self.rowRoomColumn = [];
            for (var i = 0; i < data.length; i++) {
                if (i === 0) {
                    // 如果是第一条记录（即索引是0的时候），向数组中加入１
                    self.rowAndColumn.push(1);
                    self.pos = 0;
                    self.rowRoomColumn.push(1);
                    self.posT = 0;
                } else {
                    //data[i].typeDesc就是你从接口读取的字段信息，下同
                    if (data[i].typeDesc === data[i - 1].typeDesc) {
                        // 如果typeDesc相等就累加，并且push 0
                        self.rowAndColumn[self.pos] += 1
                        self.rowAndColumn.push(0)
                        if (data[i].areaDesc === data[i - 1].areaDesc) {
                            // 如果areaDesc相等就累加，并且push 0
                            self.rowRoomColumn[self.posT] += 1
                            self.rowRoomColumn.push(0)
                        } else {
                            self.rowRoomColumn.push(1)
                            self.posT = i
                        }
                    } else {
                        // 不相等push 1
                        self.rowAndColumn.push(1)
                        self.pos = i;
                        self.rowRoomColumn.push(1)
                        self.posT = i
                    }
                }
            }
        },

objectSpanMethod({ row, column, rowIndex, columnIndex }) {
            let self = this
            if (columnIndex === 1) {
                if (self.rowAndColumn[rowIndex]) {
                let rowNum = self.rowAndColumn[rowIndex];
                return {
                    rowspan: rowNum,
                    colspan: rowNum > 0 ? 1 : 0
                    }                                                   
                }
                return {
                    rowspan: 0,
                    colspan: 0
                }  
            }
            if (columnIndex === 2) {
                if (self.rowRoomColumn[rowIndex]) {
                let roomNum = self.rowRoomColumn[rowIndex];
                return {
                    rowspan: roomNum,
                    colspan: roomNum > 0 ? 1 : 0
                    }                                                   
                }
                return {
                    rowspan: 0,
                    colspan: 0
                }  
            }
        },