• (BOOL)checkProductDate:(NSString *)tempDate {

  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  [dateFormatter setDateFormat:@"yyyy-MM-dd"];
  NSDate *date = [dateFormatter dateFromString:tempDate];
  // 判斷是否大于當前時間
  if ([date earlierDate:[NSDate date]] != date) {
  return true;
  } else {
  return false;
  }

}