iOS开发之-- 抢购、距活动结束，剩余时间倒计时

/**
*  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;
}