关于iOS 阴历阳历转化的那些事儿

Apple有时候是非常有人性化的，他们的家的iphone居然还支持藏文，但有时候就是很坑的，简直毫无人了可言。

      Apple有一个 UIDatePicker这UI控件可以显示中国的农历，但是去获取现实的数据的时候却是给了一个NSDate类型的数据，然后你如果要现实农历还需要去转换，最坑的是UIDatePicker和UIPickerView还不是同一个东西，一个是继承UIControl, 一个是继承 UIView的，UIPickerView可以通过代理去获取，但是UIDatePicker就只能通过addTarget的方式去获取它的value。

这里就需要去转化了。

试过很多的方法，但是网上的很多人说有坑，说的是万年历的数据不全，或者是有错误，我这里尝试了很多套的万年历数据，最后用了一套能解决百分之九十九的日期转换。一般会出错的就是农历闰月的时间转化，闰月转阳历都说少一天，反复切换，日期就不会不断的变早。

我们先去创建一个header文件去放万年历的数据：

////  QYJDataConfig.h//  QYJGYDateCenter////  Created by Isoftstone on 17/2/7.//  Copyright © 2017年 com.qyji.DateDemo. All rights reserved.//#ifndef QYJDataConfig_h#define QYJDataConfig_h#include <stdio.h>#include <string.h>#import "NSDate+FSExtension.h"//最小年限#define MIN_YEAR 1900//最大年限 取决下面万年历转化的数据#define MAX_YEAR 2099#define lunarDays @[@"零",@"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",@"廿", @"廿一",@"廿二", @"廿三", @"廿四", @"廿五", @"廿六", @"廿七", @"廿八", @"廿九", @"卅"]#define lunarMonths @[@"零", @"正",@"二", @"三", @"四", @"五", @"六", @"七", @"八", @"九", @"十", @"冬", @"腊"]static int DAYS_BEFORE_MONTH[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};unsigned int lunarToSolar[200] = {    0x84B6BF,/*1900*/    0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A,/*1901-1910*/    0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754,/*1911-1920*/    0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E,/*1921-1930*/    0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48,/*1931-1940*/    0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51,/*1941-1950*/    0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x6AD53C,/*1951-1960*/    0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46,/*1961-1970*/    0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50,/*1971-1980*/    0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x095746, 0x5497BB,/*1981-1990*/    0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645,/*1991-2000*/    0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E,/*2001-2010*/    0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9,/*2011-2020*/    0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x6a573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43,/*2021-2030*/    0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C,/*2031-2040*/    0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37,/*2041-2050*/    0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06AA44, 0x4AB638, 0x0AAE4C, 0x092E42,/*2051-2060*/    0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B,/*2061-2070*/    0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6,/*2071-2080*/    0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E,/*2081-2090*/    0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5          /*2091-2099*/};unsigned int solarTolunar[] = {    0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,    0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,    0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,    0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,    0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,        0x06ca0,0x0b550,0x15355,0x04da0,0x0a5b0,0x14573,0x052b0,0x0a9a8,0x0e950,0x06aa0,    0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,    0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b6a0,0x195a6,    0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,    0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,        0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,    0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,    0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,    0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,    0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0,        0x04b63,0x0937f,0x049f8,0x04970,0x064b0,0x068a6,0x0ea5f,0x06b20,0x0a6c4,0x0aaef,    0x092e0,0x0d2e3,0x0c960,0x0d557,0x0d4a0,0x0da50,0x05d55,0x056a0,0x0a6d0,0x055d4,    0x052d0,0x0a9b8,0x0a950,0x0b4a0,0x0b6a6,0x0ad50,0x055a0,0x0aba4,0x0a5b0,0x052b0,    0x0b273,0x06930,0x07337,0x06aa0,0x0ad50,0x04b55,0x04b6f,0x0a570,0x054e4,0x0d260,    0x0e968,0x0d520,0x0daa0,0x06aa6,0x056df,0x04ae0,0x0a9d4,0x0a4d0,0x0d150,0x0f252,    0x0d520};#endif /* QYJDataConfig_h */这里使用两套的数据源，分开来使用。
转换的代码：
阳历转阴历（公转农历）
#PRagma mark - lunar To solar// 传入农历转换成新历+ (NSString *)toSolar:(id)lunar {    NSString *lunarStr;    if ([lunar isKindOfClass:[NSDate class]]) {        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        formatter.dateFormat = @"yyyy-MM-dd";        lunarStr = [formatter stringFromDate:lunar];        return lunarStr;    } else {        lunarStr = lunar;    }        NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"年月"];    NSArray *year_month_day = [lunarStr componentsSeparatedByCharactersInSet:set];    int year = [year_month_day.firstObject intValue];    NSString *monthStr = year_month_day[1];    int month = 0;    BOOL reserved = NO;        if ([monthStr rangeOfString:@"闰"].length > 0) {        //闰年        monthStr = [monthStr substringFromIndex:1];        month = (int)[lunarMonths indexOfObject:monthStr];        reserved = YES;    } else {        //平年        month = (int)[lunarMonths indexOfObject:monthStr];        reserved = NO;    }        int day = (int)[lunarDays indexOfObject:year_month_day[2]];    return [LunarToSolar lunarToSolarYear:year month:month monthDay:day leapMonth:reserved];}+ (NSString *)lunarToSolarYear:(int)year month:(int)month monthDay:(int)monthDay leapMonth:(BOOL)isLeapMonth {    int dayOffset;    int leapMonth;    int i;        if (year < MIN_YEAR || year > MAX_YEAR || month < 1 || month > 12        || monthDay < 1 || monthDay > 30) {        return @"";    }        dayOffset = (lunarToSolar[year - MIN_YEAR] & 0x001F) - 1;        if (((lunarToSolar[year - MIN_YEAR] & 0x0060) >> 5) == 2)        dayOffset += 31;        for (i = 1; i < month; i++) {        if ((lunarToSolar[year - MIN_YEAR] & (0x80000 >> (i - 1))) == 0)            dayOffset += 29;        else            dayOffset += 30;    }        dayOffset += monthDay;    leapMonth = (lunarToSolar[year - MIN_YEAR] & 0xf00000) >> 20;        // 这一年有闰月    if (leapMonth != 0) {        if (month > leapMonth || (month == leapMonth && isLeapMonth)) {            if ((lunarToSolar[year - MIN_YEAR] & (0x80000 >> (month - 1))) == 0)                dayOffset += 29;            else                dayOffset += 30;        }    }        if (dayOffset > 366 || (year % 4 != 0 && dayOffset > 365)) {        year += 1;        if (year % 4 == 1)            dayOffset -= 366;        else            dayOffset -= 365;    }        int solarInfo[3];    for (i = 1; i < 13; i++) {        int iPos = DAYS_BEFORE_MONTH[i];        if (year % 4 == 0 && i > 2) {            iPos += 1;        }                if (year % 4 == 0 && i == 2 && iPos + 1 == dayOffset) {            solarInfo[1] = i;            solarInfo[2] = dayOffset - 31;            break;        }                if (iPos >= dayOffset) {            solarInfo[1] = i;            iPos = DAYS_BEFORE_MONTH[i - 1];            if (year % 4 == 0 && i > 2) {                iPos += 1;            }            if (dayOffset > iPos)                solarInfo[2] = dayOffset - iPos;            else if (dayOffset == iPos) {                if (year % 4 == 0 && i == 2)                    solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1] + 1;                else                    solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1];                            } else                solarInfo[2] = dayOffset;            break;        }    }    solarInfo[0] = year;    int resultYear = year;    int resultMonth = solarInfo[1];    int resultDay = solarInfo[2];    NSString *result = [NSString stringWithFormat:@"%d-%02d-%02d", resultYear, resultMonth, resultDay];    return result;}阴历转阳历（农历转公历）
#pragma mark - solar To lunar// 传入新历转换成农历+ (NSString *)toLunar:(id)solar {    NSDate *solarDate = nil;    if ([solar isKindOfClass:[NSDate class]]) {        solarDate = solar;    } else {        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        formatter.dateFormat = @"yyyy-MM-dd";        solarDate = [formatter dateFromString:solar];    }    NSInteger year = solarDate.fs_year;    NSInteger month = solarDate.fs_month;    NSInteger day = solarDate.fs_day;        return [self solarToLunarCalendarThisDate:solarDate year:year month:month day:day];}+ (NSString *)solarToLunarCalendarThisDate:(NSDate *)thisdate year:(int)lunarYear month:(int)lunarMonth day:(int)lunarDay {    NSString *start = @"1900-01-31";    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];    [dateFormatter setDateFormat:@"yyyy-MM-dd"];    NSString *end = [dateFormatter stringFromDate:thisdate];        NSDateFormatter *f = [[NSDateFormatter alloc] init];    [f setDateFormat:@"yyyy-MM-dd"];    NSDate *startDate = [f dateFromString:start];    NSDate *endDate = [f dateFromString:end];        NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];        NSDateComponents *components = [gregorianCalendar components:NSDayCalendarUnit fromDate:startDate toDate:endDate options:0];        int dayCyclical=(int)(([components day] + 30)/(86400/(3600*24)))+10;        int sumdays = (int)[components day];        int tempdays = 0;        //计算农历年    for (lunarYear = 1900; lunarYear < 2100 && sumdays > 0; lunarYear++) {        tempdays = [self LunarYearDays:lunarYear];        sumdays -= tempdays;    }        if (sumdays < 0) {        sumdays += tempdays;        lunarYear--;    }        //计算闰月    int doubleMonth = [self DoubleMonth:lunarYear];    BOOL isLeap = NO;        //计算农历月    for (lunarMonth = 1; lunarMonth < 13 && sumdays > 0; lunarMonth++) {        //闰月        if (doubleMonth > 0 && lunarMonth == (doubleMonth + 1) && isLeap == false) {            --lunarMonth;            isLeap = true;            tempdays = [self DoubleMonthDays:lunarYear];        } else {            tempdays = [self MonthDays:lunarYear:lunarMonth];        }                //解除闰月        if (isLeap == true && lunarMonth == (doubleMonth + 1)) {            isLeap = false;        }        sumdays -= tempdays;    }        //计算农历日    if (sumdays == 0 && doubleMonth > 0 && lunarMonth == doubleMonth + 1) {        if (isLeap) {            isLeap = false;        } else {            isLeap = true;            --lunarMonth;        }    }        if (sumdays < 0) {        sumdays += tempdays;        --lunarMonth;    }        lunarDay = sumdays + 1;        NSString *string = [NSString stringWithFormat:@"%d年", lunarYear];    if (isLeap) {        string = [string stringByAppendingString:[NSString stringWithFormat:@"闰%@月", lunarMonths[lunarMonth]]];    } else {        string = [string stringByAppendingString:[NSString stringWithFormat:@"%@月", lunarMonths[lunarMonth]]];    }        string = [string stringByAppendingString:[NSString stringWithFormat:@"%@", lunarDays[lunarDay]]];    return string;}+ (int)LunarYearDays:(int)y {    int i, sum = 348;    for (i = 0x8000; i > 0x8; i >>= 1)    {        if ((solarTolunar[y - 1900] & i) != 0)            sum += 1;    }    return (sum + [self DoubleMonthDays:y]);}+ (int)DoubleMonth:(int)y {    return (solarTolunar[y - 1900] & 0xf);}///返回农历年闰月的天数+ (int)DoubleMonthDays:(int)y {    if ([self DoubleMonth:y] != 0)        return (((solarTolunar[y - 1900] & 0x10000) != 0) ? 30 : 29);    else        return (0);}///返回农历年月份的总天数+ (int)MonthDays:(int)y :(int)m {    return (((solarTolunar[y - 1900] & (0x10000 >> m)) != 0) ? 30 : 29);}
/*!
 @method toLunar:
 @abstract 公历转农历
 @discussion 公历转农历
 @param solar id
 @result NSString
 */
+ (NSString *)toLunar:(id)solar;
/*!
 @method toSolar:
 @abstract 农历转公历
 @discussion 农历转公历
 @param lunar id
 @result NSString
 */
+ (NSString *)toSolar:(id)lunar;
外部调用下这两个方法。