iOS - 获取系统时间年月日,阳历(公历)日期转农历的方法

//获取当前时间
    NSDate *now = [NSDate date];
    NSLog(@" now date is: %@ ",now);

    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:now];

    int year = [dateComponent year];
    int month = [dateComponent month];
    int day = [dateComponent day];
    int hour = [dateComponent hour];
    int minute = [dateComponent minute];
    int second = [dateComponent second];

    NSLog(@" year is: %d ",year);
    NSLog(@" month is: %d ",month);
    NSLog(@" day is: %d ",day);
    NSLog(@" hour is: %d ",hour);
    NSLog(@" minute is: %d ",minute);
    NSLog(@" second is: %d ",second);

NSString *dateTime = [self LunarForSolarYear:year Month:month Day:day];

//农历转换函数
- (NSString *)LunarForSolarYear:(int)wCurYear Month:(int)wCurMonth Day:(NSInteger)wCurDay {
    //农历日期名
    NSArray *cDayName =  [NSArray arrayWithObjects:@"*",@"初一",@"初二",@"初三",@"初四",@"初五",@"初六",@"初七",@"初八",@"初九",@"初十",

                          @"十一",@"十二",@"十三",@"十四",@"十五",@"十六",@"十七",@"十八",@"十九",@"二十",

                          @"廿一",@"廿二",@"廿三",@"廿四",@"廿五",@"廿六",@"廿七",@"廿八",@"廿九",@"三十",nil];
    //农历月份名
    NSArray *cMonName =  [NSArray arrayWithObjects:@"*",@"正",@"二",@"三",@"四",@"五",@"六",@"七",@"八",@"九",@"十",@"十一",@"腊",nil];
    //公历每月前面的天数
    const int wMonthAdd[] = {,,,,,,,,,,,};
    //农历数据
    const int wNongliData[] = {,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,

        ,,,,,,,,,,};

    static int nTheDate,nIsEnd,m,k,n,i,nBit;
    //计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)
    nTheDate = (wCurYear - ) *  + (wCurYear - ) /  + wCurDay + wMonthAdd[wCurMonth - ] - ;

    if((!(wCurYear % )) && (wCurMonth > ))
        nTheDate = nTheDate + ;

    //计算农历天干、地支、月、日
    nIsEnd = ;
    m = ;

    while(nIsEnd != ) {
        if(wNongliData[m] < )
            k = ;
        else
            k = ;
        n = k;
        while(n>=) {
            //获取wNongliData(m)的第n个二进制位的值
            nBit = wNongliData[m];
            for(i=;i< n+;i++)
                nBit = nBit/;
                nBit = nBit % ;
            if (nTheDate <= ( + nBit)) {
                nIsEnd = ;
                break;
            }
            nTheDate = nTheDate -  - nBit;
            n = n - ;
        }
        if(nIsEnd)
            break;
        m = m + ;
    }

    wCurYear =  + m;
    wCurMonth = k - n + ;
    wCurDay = nTheDate;

    if (k == ) {
        if (wCurMonth == wNongliData[m] /  + )
            wCurMonth =  - wCurMonth;
        else if (wCurMonth > wNongliData[m] /  + )
            wCurMonth = wCurMonth - ;
    }
    //生成农历月
    NSString *szNongliMonth;
    if (wCurMonth < ){
        szNongliMonth = [NSString stringWithFormat:@"闰%@",(NSString *)[cMonName objectAtIndex:- * wCurMonth]];
    }else{
        szNongliMonth = (NSString *)[cMonName objectAtIndex:wCurMonth];
    }
    //生成农历日
    NSString *szNongliDay = [cDayName objectAtIndex:wCurDay];
    //合并
    NSString *lunarDate = [NSString stringWithFormat:@"农历%@月%@",szNongliMonth,szNongliDay];
    return lunarDate;
}