IOS关于大型网站抢购、距活动结束，剩余时间倒计时的实现代码

/*** 倒计时** @param endTime 截止的时间戳** @return 返回的剩余时间*/- (NSString*)remainingTimeMethodAction:(long long)endTime{//得到当前时间NSDate *nowData = [NSDate date];NSDate *endData=[NSDate dateWithTimeIntervalSince1970:endTime];NSCalendar* chineseClendar = [ [ NSCalendar alloc ] initWithCalendarIdentifier:NSGregorianCalendar ];NSUInteger unitFlags =NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit;NSDateComponents *cps = [chineseClendar components:unitFlags fromDate:nowData toDate: endData options:0];NSInteger Hour = [cps hour];NSInteger Min = [cps minute];NSInteger Sec = [cps second];NSInteger Day = [cps day];NSInteger Mon = [cps month];NSInteger Year = [cps year];NSLog( @" From Now to %@, diff: Years: %d Months: %d, Days; %d, Hours: %d, Mins:%d, sec:%d",[nowData description], Year, Mon, Day, Hour, Min,Sec );NSString *countdown = [NSString stringWithFormat:@"还剩: %zi天 %zi小时 %zi分钟 %zi秒 ", Day,Hour, Min, Sec];if (Sec<0) {countdown=[NSString stringWithFormat:@"活动结束/开始抢购"];}return countdown;}