getColumn method
获取对应列的数据列表
Implementation
List<SpinnerItemData> getColumn(int index) {
final fenceList = value.data.items;
if (index == 0) {
return fenceList;
}
List<SpinnerItemData> list = fenceList;
for (var i = 0; i < index; i++) {
final idx = value.idxList[i];
if (list.length > idx) {
list = list[idx].items;
}
}
return list;
}