ios开发之--把秒转换为天时分秒

把秒转换成时分秒：

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

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

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

把毫秒转换成时间格式：

    //将时间数据（毫秒）转换为天和小时
    - (NSString*)getOvertime:(NSString*)mStr
    {
        long msec = [mStr longLongValue];  

        if (msec <= )
        {
            return @"";
        }  

        NSInteger d = msec////;
        NSInteger h = msec///%;
        //NSInteger  m = msec/1000/60%60;
        //NSInteger  s = msec/1000%60;  

        NSString *_tStr = @"";
        NSString *_dStr = @"";
        NSString *_hStr = @"";
        NSString *_hTimeType = @"defaultColor";  

        if (d > )
        {
            _dStr = [NSString stringWithFormat:@"%ld天",d];
        }  

        if (h > )
        {
            _hStr = [NSString stringWithFormat:@"%ld小时",h];
        }  

        //小于2小时 高亮显示
        if (h >  && h < )
        {
            _hTimeType = @"hightColor";
        }  

        _tStr = [NSString stringWithFormat:@"%@%@后到期-%@",_dStr,_hStr,_hTimeType];  

        return _tStr;
    }