difference method

Duration difference(
  1. dynamic date
)

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);
  }
}