objectSpanMethod({ row, column, rowIndex, columnIndex }) {//合并规则 //当前行row、当前列column、当前行号rowIndex、当前列号columnIndex if (columnIndex === 0) {//第一列:参数column.property,内容:row.name,合并数量this.columnDatas[row.name] console.log(this.columnDatas[rowIndex],column.property,row.name,"读取参数") const _row = this.columnDatas[rowIndex];//每一列的数目:[1,2,0,1] if (_row) { return { rowspan: _row, colspan: 1 }; } else { return { rowspan: 0, colspan: 0 }; } } },
注:目标是计算合并相同key的数量_row,而且是一个数组格式
//合并相同key的数据data:如:this.getSpanArr(this.dataSource,"name");//[1,2,0,1] getSpanArr(data,key) { let spanArr = []; let spanIndex = null; if (data == null) { return []; } else { for (let i = 0; i < data.length; i++) { if (i === 0) { spanArr.push(1); spanIndex = 0; } else { if (data[i][key]=== data[i - 1][key]) { spanArr[spanIndex] += 1; spanArr.push(0); } else { spanArr.push(1); spanIndex = i; } } } return spanArr; } },
附:常见合并key,读取value与num
//计算相同key的数量num:{value:num},value是内容 handleSpand(data,key) { let obj = {}; data.forEach(val => { if (obj[val.key]) { obj[val.key]++; } else { obj[val.key] = 1; } }); return obj; },