difference method
时间差 两个时间相差 小时数
date
必须是 Dayfl 或者 DateTime
Implementation
Duration difference(var date) {
if (date is Dayfl) {
return _datetime!.difference(date.dateTime!);
} else if (date is DateTime) {
return _datetime!.difference(date);
} else {
return const Duration(hours: 0);
}
}