kisYesterday method

bool kisYesterday()

根据时间判断是否是昨天

Implementation

bool kisYesterday() {
  var file = this;
  var now = DateTime.now();
  if (file.year == now.year) {
    int spDay = now.kgetDayOfYear() - file.kgetDayOfYear();
    return spDay == 1;
  } else {
    return ((now.year - file.year == 1) &&
        file.month == 12 &&
        now.month == 1 &&
        file.day == 31 &&
        now.day == 1);
  }
}