效果如动图：
日历.gif
传入年份，返回给你一年的数据：
//调用的接口
- (NSMutableArray *)getNumberOfDaysInMonthByYear:(NSString *)whichYear;
实现的具体代码：
// 获取一年中每月的总天数
- (NSMutableArray *)getNumberOfDaysInMonthByYear:(NSString *)whichYear
{
NSCalendar * calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian]; // 指定日历的算法
NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSMutableArray *allYaerMonthDayCountArray = [[NSMutableArray alloc] init];
for (int j=0; j<12; j++) {
NSMutableDictionary *dicM = [[NSMutableDictionary alloc] init];
NSString * dateStr = [NSString stringWithFormat:@"%@-%02d-01",whichYear,j+1];
NSDate * currentDate = [formatter dateFromString:dateStr];
NSRange range = [calendar rangeOfUnit:NSCalendarUnitDay
inUnit: NSCalendarUnitMonth
forDate:currentDate];
[formatter setDateFormat:@"yyyy-MM"];
NSString * str = [formatter stringFromDate:currentDate];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSMutableArray * allDaysArray = [[NSMutableArray alloc] init];
for (NSInteger i = 1; i <= range.length; i++) {
NSString * sr = [NSString stringWithFormat:@"%@-%ld",str,i];
NSDate *suDate = [formatter dateFromString:sr];
[allDaysArray addObject:[self getweekDayWithDate:suDate]];
}
[dicM setObject:@(range.length) forKey:@"monthAllDayCount"];
[dicM setObject:allDaysArray forKey:@"monthWeekArray"];
[allYaerMonthDayCountArray addObject:dicM];
}
return allYaerMonthDayCountArray;
}
/**
* 获得某天的数据
*
* 获取指定的日期是星期几
*/
- (id) getweekDayWithDate:(NSDate *) date
{
NSCalendar * calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian]; // 指定日历的算法
NSDateComponents *comps = [calendar components:NSCalendarUnitWeekday fromDate:date];
// 1 是周日，2是周一 3.以此类推
return @([comps weekday]);
}
返回的数据结构如下图：
返回的数据结构.png
上面的这些都是处理阳历数据，如果需要显示农历和对应的节假日什么的，也提供了一个接口，
// 获取date当天的农历
-(NSString*)getChineseCalendarWithDate:(NSString*)date;
需要传入"2017-01-01"这样的日期字符串。具体代码如下：
-(NSString*)getChineseCalendarWithDate:(NSString*)date{
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];
NSArray *chineseMonths=[NSArray arrayWithObjects:
@"正月", @"二月", @"三月", @"四月", @"五月", @"六月", @"七月", @"八月",
@"九月", @"十月", @"十一月", @"腊月", nil];
NSArray *chineseDays=[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];
NSDate *dateTemp = nil;
NSDateFormatter *dateFormater = [[NSDateFormatter alloc]init];
[dateFormater setDateFormat:@"yyyy-MM-dd"];
dateTemp = [dateFormater dateFromString:date];
NSCalendar *localeCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierChinese];
unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;
NSDateComponents *localeComp = [localeCalendar components:unitFlags fromDate:dateTemp];
// NSLog(@"%ld_%ld_%ld %@",(long)localeComp.year,(long)localeComp.month,(long)localeComp.day, localeComp.date);
NSString *y_str = [chineseYears objectAtIndex:localeComp.year-1];
NSString *m_str = [chineseMonths objectAtIndex:localeComp.month-1];
NSString *d_str = [chineseDays objectAtIndex:localeComp.day-1];
NSString *chineseCal_str =nil;
NSString *choose_str = [NSString stringWithFormat: @"%@%@",m_str,d_str];
NSString *riqi_str = [date substringWithRange:NSMakeRange(5, 5)];
if ([d_str isEqualToString:@"初一"]) {
chineseCal_str =[NSString stringWithFormat: @"%@",m_str];
}else{
if ([riqi_str isEqualToString:@"01-01"]) {
chineseCal_str = @"元旦节";
}else if([riqi_str isEqualToString:@"04-01"]){
chineseCal_str = @"愚人节";
}else if([riqi_str isEqualToString:@"05-01"]){
chineseCal_str = @"劳动节";
}else if([riqi_str isEqualToString:@"06-01"]){
chineseCal_str = @"儿童节";
}else if([riqi_str isEqualToString:@"07-01"]){
chineseCal_str = @"建军节";
}else if([riqi_str isEqualToString:@"08-01"]){
chineseCal_str = @"建党节";
}else if([riqi_str isEqualToString:@"09-10"]){
chineseCal_str = @"教师节";
}else if([riqi_str isEqualToString:@"10-01"]){
chineseCal_str = @"国庆节";
}else if([riqi_str isEqualToString:@"12-25"]){
chineseCal_str = @"圣诞节";
}else if ([choose_str isEqualToString:@"腊月三十"]) {
chineseCal_str = @"除夕夜";
}else if ([choose_str isEqualToString:@"正月十五"]){
chineseCal_str =@"元宵节";
}else if ([choose_str isEqualToString:@"二月初二"]){
chineseCal_str =@"龙头节";
}else if ([choose_str isEqualToString:@"三月初八"]){
chineseCal_str =@"清明节";
}else if ([choose_str isEqualToString:@"五月初五"]){
chineseCal_str =@"端午节";
}else if ([choose_str isEqualToString:@"八月十五"]){
chineseCal_str =@"中秋节";
}else{
chineseCal_str =[NSString stringWithFormat: @"%@",d_str];
}
}
return chineseCal_str;
}
数据准备就这些，下面就是如何处理并显示的问题了。
这个demo采用的是collectioncell显示的，数据中两个比较关键的值一个是当月共多少天，一个是当月第一天是周几。因为collectioncell在显示的时候从左至右一排一排排列的，但是不可能每月的一号都在第一个位置，我做的处理是，根据当月第一天是周几，collectioncell从第几个indexpath.row+1-周几 的那个位置开始显示，cell的数量顺序增加周几个数。
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
LFCalendarCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"LFCalendarCollectionViewCell" forIndexPath:indexPath];
LFCanlendarModel *model = self.sourceDataArray[indexPath.section];
NSArray *arr = model.monthWeekArray;
NSInteger number = indexPath.row+1-[arr[0] integerValue];
if (number>=0) {
[cell setCellStylebyIndexPath:indexPath withNowInteger:number+1 withYear:yearStr];
}else{
[cell setCellStylebyIndexPath:indexPath withNowInteger:0 withYear:yearStr];
}
return cell;
}
需要代码的可以去https://github.com/marsLiuFei/CalendarDemo 进行下载。代码不是很严谨，但总体效果能实现。如果有好的修改方案，还希望在GitHub给予fork修改。共同学习，谢谢！
