iOS 电商购物车倒计时时间计算

/**

 * 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];

    //把时间戳转换成date格式

    NSDate *endData=[NSDate dateWithTimeIntervalSince1970:endTime];

    //创建日历对象

    NSCalendar* chineseClendar = [ [ NSCalendar alloc ] initWithCalendarIdentifier:NSCalendarIdentifierGregorian ];

    //设置单元标识 小时 分钟 秒 天 月 年

    NSUInteger unitFlags =

    NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear;

    //给出开始时间 和 结束时间 获取单位标识的数据

    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: %ld Months: %ld, Days; %ld, Hours: %ld, Mins:%ld, sec:%ld",

          [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;

}