startOf method

Dayfl startOf(DateLocationEnum type)

Manipulate the Dayfl object to the start of a unit of time.

Implementation

Dayfl startOf(DateLocationEnum type) {
  if (_datetime == null) {
    throw StateError('当前Dayfl对象包含无效的日期时间');
  }
  switch (type) {
    case DateLocationEnum.year:
      _datetime = DateTime(year, 1, 1, 0, 0, 0, 0);
      break;
    case DateLocationEnum.month:
      _datetime = DateTime(year, month, 1, 0, 0, 0, 0);
      break;
    case DateLocationEnum.day:
      _datetime = DateTime(year, month, day, 0, 0, 0, 0);
      break;
    case DateLocationEnum.hour:
      _datetime = DateTime(year, month, day, hour, 0, 0, 0);
      break;
    case DateLocationEnum.minute:
      _datetime = DateTime(year, month, day, hour, minute, 0, 0);
      break;
    case DateLocationEnum.sec:
      _datetime = DateTime(year, month, day, hour, minute, second, 0);
      break;
    default:
      break;
  }
  _init();
  return this;
}