iOS日历显示农历信息

第一次接触到日历的开发，表示需要学习的东西还有很多呢！
关于日历的开发，如果不进行相关设置的话，默认是没有农历的，需要我们进行设置。

核心Demo如下：

monthArr = [NSArray arrayWithObjects:
                        @"正月", @"二月", @"三月", @"四月", @"五月", @"六月", @"七月", @"八月",
                        @"九月", @"十月", @"冬月", @"腊月", nil];

dayArr = [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];

unsigned unitFlags =  NSCalendarUnitMonth |  NSCalendarUnitDay;
NSCalendar *localeCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierChinese];
NSDateComponents *localeComp = [localeCalendar components:unitFlags fromDate:date];

NSString *monthStr = [monthArr objectAtIndex:localeComp.month-1];
NSString *dayString = [dayArr objectAtIndex:localeComp.day-1];

当然如果你需要显示当前年份的农历表示需要新增如下设置：

NSArray *chineseYears = [NSArray arrayWithObjects:
 @"甲子", @"乙丑", @"丙寅", @"丁卯",  @"戊辰",  @"己巳",  @"庚午",  @"辛未",  @"壬申",  @"癸酉",
 @"甲戌",   @"乙亥",  @"丙子",  @"丁丑", @"戊寅",   @"己卯",  @"庚辰",  @"辛己",  @"壬午",  @"癸未",
 @"甲申",   @"乙酉",  @"丙戌",  @"丁亥",  @"戊子",  @"己丑",  @"庚寅",  @"辛卯",  @"壬辰",  @"癸巳",
 @"甲午",   @"乙未",  @"丙申",  @"丁酉",  @"戊戌",  @"己亥",  @"庚子",  @"辛丑",  @"壬寅",  @"癸丑",
 @"甲辰",   @"乙巳",  @"丙午",  @"丁未",  @"戊申",  @"己酉",  @"庚戌",  @"辛亥",  @"壬子",  @"癸丑",
 @"甲寅",   @"乙卯",  @"丙辰",  @"丁巳",  @"戊午",  @"己未",  @"庚申",  @"辛酉",  @"壬戌",  @"癸亥", nil];

unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay;

NSString *yearStr = [chineseYears objectAtIndex:localeComp.year-1];

效果图如下：

GitHub上第三方日历有两个可以试着使用一下：

1、FSCalendar
2、JTCalendar

个人推荐第一个，FSCalendar封装得比较完善。

mark --->关于代码放在什么位置FSCalendar中DataSource有一个方法
Demo如下：

#pragma mark - FSCalendarDataSource
- (NSString *)calendar:(FSCalendar *)calendar subtitleForDate:(NSDate *)date
{
    monthArr = [NSArray arrayWithObjects:
                        @"正月", @"二月", @"三月", @"四月", @"五月", @"六月", @"七月", @"八月",
                        @"九月", @"十月", @"冬月", @"腊月", nil];

    dayArr = [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];

    unsigned unitFlags =  NSCalendarUnitMonth |  NSCalendarUnitDay;
    NSCalendar *localeCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierChinese];
    NSDateComponents *localeComp = [localeCalendar components:unitFlags fromDate:date];

    NSString *monthStr = [monthArr objectAtIndex:localeComp.month-1];
    NSString *dayString = [dayArr objectAtIndex:localeComp.day-1];

    NSString *chineseCal_str;
    if ([dayString isEqualToString:@"初一"]) {
           chineseCal_str = monthStr;
       } else {
           chineseCal_str = dayString;
       }
       return chineseCal_str;
   }

其他诸如 JTCalendar 框架中如何设置农历显示，可在其DataSource或者Delegate中查看是否有 subtitleForDate 类似的设置