NSDate获取间隔年数月数后的NSDate，获取NSDate的年月日时分秒星期几

/**

 *  dateNow的年月日十分秒和星期几

 *

 *  @param date NSDate格式的时间

 *

 *  @return
日期被分解后的key－value

 */

+(NSDictionary*)getTimeInThisTimeZoneAfter:(NSDate*)dateNow{

    if (dateNow ==nil) {

        dateNow = [NSDate
date];

    }

    NSString *weekDay;

//    NSDate *dateNow;

//    dateNow=[NSDate dateWithTimeIntervalSinceNow:secondDelay*24*60*60];//dayDelay代表向后推几天，如果是0则代表是今天，如果是1就代表向后推24小时，如果想向后推12小时，就可以改成dayDelay*12*60*60,让dayDelay＝1

    NSCalendar *calendar = [[NSCalendar
alloc]
initWithCalendarIdentifier:NSCalendarIdentifierGregorian];//设置成中国阳历

    NSInteger unitFlags =
NSCalendarUnitYear | NSCalendarUnitMonth |
NSCalendarUnitDay | NSCalendarUnitWeekday |
NSCalendarUnitHour | NSCalendarUnitMinute |
NSCalendarUnitSecond;//这句我也不明白具体时用来做什么。。。

    NSDateComponents *comps = [calendar
components:unitFlags fromDate:dateNow];

    

    

    long year=[comps
year];//获取年对应的长整形字符串

    NSString* Year = [NSString
stringWithFormat:@"%ld",year];

    long month=[comps
month];//获取月对应的长整形字符串

    NSString* Month = [NSString
stringWithFormat:@"%@%ld",month<10?@"0":@"",month];

    long day=[comps
day];//获取日期对应的长整形字符串

    NSString* Day = [NSString
stringWithFormat:@"%@%ld",day<10?@"0":@"",day];

    long hour=[comps
hour];//获取小时对应的长整形字符串

    NSString* Hour = [NSString
stringWithFormat:@"%@%ld",hour<10?@"0":@"",hour];

    long minute=[comps
minute];//获取月对应的长整形字符串

    NSString* Minute = [NSString
stringWithFormat:@"%@%ld",minute<10?@"0":@"",minute];

    long second=[comps
second];//获取秒对应的长整形字符串

    NSString* Second = [NSString
stringWithFormat:@"%@%ld",second<10?@"0":@"",second];

    long weekNumber = [comps
weekday]; //获取星期对应的长整形字符串

    

    switch (weekNumber) {

        case 1:

            weekDay=@"星期日";

            break;

        case 2:

            weekDay=@"星期一";

            break;

        case 3:

            weekDay=@"星期二";

            break;

        case 4:

            weekDay=@"星期三";

            break;

        case 5:

            weekDay=@"星期四";

            break;

        case 6:

            weekDay=@"星期五";

            break;

        case 7:

            weekDay=@"星期六";

            break;

        default:

            break;

    }

    NSMutableDictionary* m_dic = [[NSMutableDictionary
alloc]init];

    [m_dic setValue:Year
forKey:@"year"];

    [m_dic setValue:Month
forKey:@"month"];

    [m_dic setValue:Day
forKey:@"day"];

    [m_dic setValue:Hour
forKey:@"hour"];

    [m_dic setValue:Minute
forKey:@"minute"];

    [m_dic setValue:Second
forKey:@"second"];

    [m_dic setValue:weekDay
forKey:@"weekday"];

    

    return m_dic;

}

/**

 *  对日期date的年月日时分秒间隔修改

 *

 *  @param date
某个时间

 *  @param intervalYear
间隔年数正加负减

 *  @param intervalMonth
间隔月数正加负减

 *  @param intervalDay
间隔天数正加负减

 *  @param intervalHour
间隔时数正加负减

 *  @param intervalMinute
间隔分数正加负减

 *  @param intervalSecond
间隔秒数正加负减

 *

 *  @return
是（YES）否（NO）在本周

 */

+(NSDate*)dateWithDate:(NSDate*)date

          intervalYear:(NSInteger)intervalYear

         intervalMonth:(NSInteger)intervalMonth

           intervalDay:(NSInteger)intervalDay

          intervalHour:(NSInteger)intervalHour

        intervalMinute:(NSInteger)intervalMinute

        intervalSecond:(NSInteger)intervalSecond{

    

    

    NSCalendar *calendar = [[NSCalendar
alloc]
initWithCalendarIdentifier:NSCalendarIdentifierGregorian];//设置成中国阳历

    

    

    NSDateComponents *components = [calendar
components:( NSCalendarUnitYear |
NSCalendarUnitMonth | NSCalendarUnitDay |
NSCalendarUnitWeekday | NSCalendarUnitHour |
NSCalendarUnitMinute | NSCalendarUnitSecond)
fromDate:date];

    

    

//    NSDate *today = [calendar dateByAddingComponents:components toDate:[[NSDate alloc] init] options:0]; //This variable should now be pointing at a date object that is the start of today (midnight);

    [components setYear:[components
year]+intervalYear];

    [components setMonth:[components
month]+intervalMonth];

    [components setDay:[components
day] + intervalDay];

    [components setHour:[components
hour]+intervalHour];

    [components setMinute:[components
minute]+intervalMinute];

    [components setSecond:[components
second]+intervalSecond];

    

    

    NSDate *retdate = [calendar
dateFromComponents:components];

    return retdate;

}