秒 ->时分秒

//传入 秒  得到 xx:xx:xx
-(NSString *)getMMSSFromSS:(NSString *)totalTime{

    NSInteger seconds = [totalTime integerValue];

    //format of hour
    NSString *str_hour = [NSString stringWithFormat:@"%02ld",seconds/3600];
    //format of minute
    NSString *str_minute = [NSString stringWithFormat:@"%02ld",(seconds%3600)/60];
    //format of second
    NSString *str_second = [NSString stringWithFormat:@"%02ld",seconds%60];
    //format of time
    NSString *format_time = [NSString stringWithFormat:@"%@:%@:%@",str_hour,str_minute,str_second];

    return format_time;

}

秒 -> 分秒

//传入 秒  得到  xx分钟xx秒
-(NSString *)getMMSSFromSS:(NSString *)totalTime{

    NSInteger seconds = [totalTime integerValue];

    //format of minute
    NSString *str_minute = [NSString stringWithFormat:@"%ld",seconds/60];
    //format of second
    NSString *str_second = [NSString stringWithFormat:@"%ld",seconds%60];
    //format of time
    NSString *format_time = [NSString stringWithFormat:@"%@分钟%@秒",str_minute,str_second];

    NSLog(@"format_time : %@",format_time);

    return format_time;

}