//转换成时分秒

- (NSString *)timeFormatted:(int)totalSeconds
{

int seconds = totalSeconds % 60;
int minutes = (totalSeconds / 60) % 60;
int hours = totalSeconds / 3600;

return [NSString stringWithFormat:@"%02d:%02d:%02d",hours, minutes, seconds];
}

//转换成当前时刻

- (NSString *)timeFormatted:(int)totalSeconds

{
NSDate  *date = [NSDate dateWithTimeIntervalSince1970:totalSeconds];
NSTimeZone *zone = [NSTimeZone systemTimeZone];
NSInteger interval = [zone secondsFromGMTForDate: date];
NSDate *localeDate = [date  dateByAddingTimeInterval: interval];
NSLog(@"enddate=%@",localeDate);
}