+(NSString*)TimeformatFromSeconds:(NSInteger)seconds
{
//format of hour
NSString *str_hour = [NSString stringWithFormat:@"%02d",seconds/3600];
//format of minute
NSString *str_minute = [NSString stringWithFormat:@"%02d",(seconds%3600)/60];
//format of second
NSString *str_second = [NSString stringWithFormat:@"%02d",seconds%60];
//format of time
NSString *format_time = [NSString stringWithFormat:@"%@:%@:%@",str_hour,str_minute,str_second];
return format_time;
}