YFCalendar----最新版自写日历

╰半橙微兮° 2022-08-22 04:44 123阅读 0赞

# 简介 #

最新版的自己写的日历，有农历和阳历。  
之前写的只是为了实现功能，没有注重代码的简洁性，这次我把代码进行了一定的分类封装。水平不够，多谢指教。  
有需求的可以看看～～～～～，有能力的来个星星谢谢哈  
[Demo传送门][Demo]

# 框架布局 #

![布局][20160524134210963]  
最重要的就是tools和yfcollectionview的代码：  
工具类包括所有的日期计算方法:

#import <Foundation/Foundation.h>
    #import "SSLunarDate.h"
    @interface NSObject (CalenderSet)
    - (NSInteger)currentYear:(NSDate *)date;//获得当前的年份
    - (NSInteger)currentMonth:(NSDate *)date;//获得当前的月份
    - (NSInteger)currentDay:(NSDate *)date;//获得当前是哪一天
    - (NSInteger)currentMonthOfDay:(NSDate *)date;//获得本月有多少天
    - (NSInteger)preInMonth:(NSDate *)date;//获得上个月月份
    - (NSInteger)nextMonth:(NSDate *)date;//获得下个月月份
    - (NSInteger)preInMonthDay:(NSDate *)date;//获得上个月有多少天
    - (NSInteger)currentFirstDay:(NSDate *)date;//获得这个月份第一天是在星期几
    - (NSMutableArray *)currentMonthArray:(NSDate *)date;//获得这个月排布数组
    - (void)changeCurrentMonth:(NSDate *)date andIndex:(int)index resultData:(void(^)(NSDate *nowDate,NSString *showMonth))block;//获得上个月或者下个月的对应的nsdate和字符串
    - (SSLunarDate *)lunarDaysString:(NSDate *)date int:(int)nowIndex;//获取对应的农历
    @end

#import "NSObject+CalenderSet.h"
    
    @implementation NSObject (CalenderSet)
    /** * 获取当前月的年份 */
    - (NSInteger)currentYear:(NSDate *)date{
    
        NSDateComponents *componentsYear = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:date];
        return [componentsYear year];
    }
    /** * 获取当前月的月份 */
    - (NSInteger)currentMonth:(NSDate *)date{
    
        NSDateComponents *componentsMonth = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:date];
        return [componentsMonth month];
    }
    /** * 获取当前是哪一天 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)currentDay:(NSDate *)date{
    
        NSDateComponents *components = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:date];
        return [components day];
    }
    /** * 本月有几天 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)currentMonthOfDay:(NSDate *)date{
    
        NSRange totaldaysInMonth = [[NSCalendar currentCalendar] rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date];
        return totaldaysInMonth.length;
    }
    /** * 本月的上一个月是第几个月 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)preInMonth:(NSDate *)date{
        //获取这个月月份
        NSInteger currentMonth = [self currentMonth:date];
        NSInteger preMonth;
        //判断上一个月是哪个月份
        if (currentMonth == 1) {
            preMonth = 12;
        }else{
    
            preMonth = currentMonth - 1;
        }
        return preMonth;
    }
    /** * 本月的下一个月是第几个月 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)nextMonth:(NSDate *)date{
    
        //获取这个月月份
        NSInteger currentMonth = [self currentMonth:date];
        NSInteger preMonth;
        //判断下一个月是哪个月份
        if (currentMonth == 12) {
            preMonth = 1;
        }else{
    
            preMonth = currentMonth + 1;
        }
        return preMonth;
    }
    /** * 上一个月是有多少天数 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)preInMonthDay:(NSDate *)date{
    
        NSInteger currnetYear = [self currentYear:date];
        NSInteger preMonth = [self preInMonth:date];
        //判断年份是不是闰年
        if (preMonth == 1 || preMonth == 3 || preMonth == 5 || preMonth == 7 || preMonth == 8 || preMonth == 10 || preMonth == 12) {
            return 31;
        }else if(preMonth == 2){
            //如果是闰年并且这个月份正好是二月份
            if(((currnetYear % 4 == 0) && (currnetYear % 100 == 0)) || (currnetYear % 400 == 0)){
    
                return 29;
            }else{
    
                return 28;
            }
        }else{
    
            return 30;
        }
    }
    /** * 本月第一天是星期几 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSInteger)currentFirstDay:(NSDate *)date{
    
        NSCalendar *calendar = [NSCalendar currentCalendar];
        // [calendar setFirstWeekday:2];//1.mon
        NSDateComponents *comp = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:date];
        [comp setDay:1];
        NSDate *firstDayOfMonthDate = [calendar dateFromComponents:comp];
    
        NSUInteger firstWeekday = [calendar ordinalityOfUnit:NSCalendarUnitWeekday inUnit:NSCalendarUnitWeekOfMonth forDate:firstDayOfMonthDate];
        return firstWeekday - 1;
    }
    /** * 获得对应月份的天数数组 * * @param date <#date description#> * * @return <#return value description#> */
    - (NSMutableArray *)currentMonthArray:(NSDate *)date{
    
        NSMutableArray *dayArray = [NSMutableArray array];
        //获取上一个月是第几个月
        NSInteger preMonth = [self preInMonth:date];
        //获取上一个月天数
        NSInteger preDay = [self preInMonthDay:date];
        //获取下一个月是第几个月
        NSInteger nextMonth = [self nextMonth:date];
    
        //当月月份
        NSInteger currentMonth = [self currentMonth:date];
    
        NSInteger day = [self currentFirstDay:date];
        for (NSInteger i = 0; i < day; i++){
            //存入字典
            NSDictionary *preDic = @{@"month":@(preMonth),@"day":@(preDay - day + i + 1),@"status":@"pre"};
            [dayArray addObject:preDic];
        }
    
        NSInteger days = [self currentMonthOfDay:date];
    
        for (NSInteger i = 1; i <= days; i++) {
            //存入字典
            NSDictionary *currentDic = @{@"month":@(currentMonth),@"day":@(i),@"status":@"current"};
            [dayArray addObject:currentDic];
        }
        //把剩下的空间置为空
        int lastCount = 1;
        for (NSInteger i = dayArray.count; i < 42; i ++) {
            //存入字典
            NSDictionary *nextDic = @{@"month":@(nextMonth),@"day":@(lastCount),@"status":@"next"};
            [dayArray addObject:nextDic];
            lastCount ++;
        }
        return dayArray;
    }
    /** * 获得对应的nsdate和显示的年份月份 * */
    - (void)changeCurrentMonth:(NSDate *)date andIndex:(int)index resultData:(void(^)(NSDate *nowDate,NSString *showMonth))block{
    
        NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
        dateComponents.month = index;
        NSDate *newDate = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponents toDate:date options:0];
        if (block) {
            block(newDate,[NSString stringWithFormat:@"%li年%li月",(long)[self currentYear:newDate],(long)[self currentMonth:newDate]]);
        }
    
    }
    /** * 获取对应的农历 * * @return <#return value description#> */
    - (SSLunarDate *)lunarDaysString:(NSDate *)date int:(int)nowIndex{
    
        NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
    
        //设置天数
        [dateComponents setDay:nowIndex];
    
        NSDate *newDate = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponents toDate:date options:0];
        SSLunarDate *lunar = [[SSLunarDate alloc] initWithDate:newDate];
        return lunar;
    }
    @end

然后是collectionview布局：

#import "YFCollectionView.h"
    #import "YFCell.h"
    #import "NSObject+CalenderSet.h"
    #import "SSLunarDate.h"
    @interface YFCollectionView()<UICollectionViewDelegate,UICollectionViewDataSource>
    
    @end
    @implementation YFCollectionView
    /** * init * */
    - (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout{
    
        self = [super initWithFrame:frame collectionViewLayout:layout];
        if (self) {
            _allDayArray = [NSMutableArray array];
            self.delegate = self;
            self.dataSource = self;
            self.backgroundColor = [UIColor whiteColor];
            //set layout
            [self setLayOut];
            // register
            [self registerClass:[YFCell class] forCellWithReuseIdentifier:@"cell"];
        }
        return self;
    }
    - (void)setAllDayArray:(NSMutableArray *)allDayArray{
    
        _allDayArray = allDayArray;
        [self reloadData];
    }
    /** * set lauOut */
    - (void)setLayOut{
    
        UICollectionViewFlowLayout *layOut = [[UICollectionViewFlowLayout alloc]init];
        layOut.itemSize = CGSizeMake(self.frame.size.width / 7, self.frame.size.height / 7);
        layOut.minimumLineSpacing = 0.0;
        layOut.minimumInteritemSpacing = 0.0;
        [self setCollectionViewLayout:layOut];
    }
    
    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    
        return 35;
    
    }
    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    
        YFCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
        NSDictionary *dic = self.allDayArray[indexPath.row];
        cell.dateLabel.text = [NSString stringWithFormat:@"%@",dic[@"day"]];
        //农历，需要判断月份，年份
        __weak typeof(self)weakSelf = self;
       __block NSString *lunarStr;
        if ([dic[@"status"] isEqualToString:@"pre"]) {
       //上一个月
            [self changeCurrentMonth:_date andIndex:-1 resultData:^(NSDate *nowDate, NSString *showMonth) {
    
                SSLunarDate *sdate = [weakSelf lunarDaysString:nowDate int:[dic[@"day"] intValue]];
                lunarStr = [NSString stringWithFormat:@"%@",[sdate dayString]];
            }];
        }else if ([dic[@"status"] isEqualToString:@"next"]){
       //下一个月
    
            [self changeCurrentMonth:_date andIndex:1 resultData:^(NSDate *nowDate, NSString *showMonth) {
    
                SSLunarDate *sdate = [weakSelf lunarDaysString:nowDate int:[dic[@"day"] intValue]];
                lunarStr = [NSString stringWithFormat:@"%@",[sdate dayString]];
            }];
        }else{
    
            SSLunarDate *sdate = [self lunarDaysString:_date int:[dic[@"day"] intValue]];
            lunarStr = [NSString stringWithFormat:@"%@",[sdate dayString]];
        }
        cell.lunarLabel.text = lunarStr;
        return cell;
    }
    /** * 选择单元格 * * @param collectionView <#collectionView description#> * @param indexPath <#indexPath description#> */
    - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    
        NSDictionary *dic = self.allDayArray[indexPath.row];
        NSLog(@"%li年 %i月 %i日 ",(long)[self currentYear:_date],[dic[@"month"] intValue],[dic[@"day"] intValue]);
    }
    @end

然后，用scrollview布局，可以左右滑动日历显示：

#import "ShowView.h"
    #import "YFCollectionView.h"
    #import "NSObject+CalenderSet.h"
    @interface ShowView()
    @property(nonatomic,strong)NSDate *date;
    @property(nonatomic,strong)YFCollectionView *leftCollectionView;//左侧
    @property(nonatomic,strong)YFCollectionView *centerCollectionView;//中间
    @property(nonatomic,strong)YFCollectionView *rightCollectionView;//右侧
    @end
    @implementation ShowView
    /** * init * * @return <#return value description#> */
    + (instancetype)createView{
    
        return [[[NSBundle mainBundle]loadNibNamed:@"ShowView" owner:nil options:nil] lastObject];
    }
    /** * set view */
    - (void)awakeFromNib{
    
        _date = [[NSDate alloc]init];
        //显示的日期
        [_centerBtn setTitle:[NSString stringWithFormat:@"%li年 %li月 %li日",[self currentYear:_date],[self currentMonth:_date],[self currentDay:_date]] forState:UIControlStateNormal];
    
        _scrollView.pagingEnabled = YES;
        _scrollView.showsVerticalScrollIndicator = NO;
        _scrollView.showsHorizontalScrollIndicator = NO;
        _scrollView.contentSize = CGSizeMake(3 * _scrollView.frame.size.width, 0);
        // add collectionview
        for (int i = 0; i < 3; i ++) {
            YFCollectionView *collectionView = [[YFCollectionView alloc]initWithFrame:CGRectMake(i * _scrollView.frame.size.width, 0, _scrollView.frame.size.width, _scrollView.frame.size.height) collectionViewLayout:[[UICollectionViewFlowLayout alloc]init]];
            collectionView.tag = i + 1001;
            [self.scrollView addSubview:collectionView];
        }
        self.leftCollectionView = (YFCollectionView *)[self viewWithTag:1001];
        self.centerCollectionView = (YFCollectionView *)[self viewWithTag:1002];
        self.rightCollectionView = (YFCollectionView *)[self viewWithTag:1003];
        //数据
        self.centerCollectionView.date = _date;
        self.centerCollectionView.allDayArray = [self currentMonthArray:_date];
    
        //左侧
        [self changeCurrentMonth:_date andIndex:-1 resultData:^(NSDate *nowDate, NSString *showMonth) {
            self.leftCollectionView.date = nowDate;
            self.leftCollectionView.allDayArray = [self currentMonthArray:nowDate];
        }];
    
        //右侧
        [self changeCurrentMonth:_date andIndex:1 resultData:^(NSDate *nowDate, NSString *showMonth) {
            self.rightCollectionView.date = nowDate;
            self.rightCollectionView.allDayArray = [self currentMonthArray:nowDate];
        }];
    
    
        self.scrollView.contentOffset = CGPointMake(self.scrollView.frame.size.width, 0);
    
    }
    /** * click pre btn * * @param sender <#sender description#> */
    - (IBAction)clickPreBtn:(UIButton *)sender {
    
        [self.scrollView setContentOffset:CGPointMake(self.scrollView.contentOffset.x - self.scrollView.frame.size.width, 0) animated:YES];
    }
    /** * clicknext btn * * @param sender <#sender description#> */
    - (IBAction)clickNextBtn:(UIButton *)sender {
    
        [self.scrollView setContentOffset:CGPointMake(self.scrollView.contentOffset.x + self.scrollView.frame.size.width, 0) animated:YES];
    }
    /** * click center btn * * @param sender <#sender description#> */
    - (IBAction)clickCenterBtn:(UIButton *)sender {
    }
    /** * scrollview delegate * */
    - (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    
        //判断
        if (self.scrollView.contentOffset.x <= 0) {
            self.scrollView.contentOffset = CGPointMake(self.scrollView.frame.size.width, 0);
            //数据重新赋予
            //中间数据
            __weak typeof(self)weakSelf = self;
            [self changeCurrentMonth:_date andIndex:-1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.centerCollectionView.date = nowDate;
                self.centerCollectionView.allDayArray = [self currentMonthArray:nowDate];
    
                [weakSelf.centerBtn setTitle:showMonth forState:UIControlStateNormal];
                weakSelf.date = nowDate;
    
            }];
    
    
            //左侧
            [self changeCurrentMonth:_date andIndex:-1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.leftCollectionView.date = nowDate;
                self.leftCollectionView.allDayArray = [self currentMonthArray:nowDate];
            }];
    
            //右侧
            [self changeCurrentMonth:_date andIndex:1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.rightCollectionView.date = nowDate;
                self.rightCollectionView.allDayArray = [self currentMonthArray:nowDate];
            }];
        }else if (self.scrollView.contentOffset.x >= self.scrollView.frame.size.width * 2.0){
    
            self.scrollView.contentOffset = CGPointMake(self.scrollView.frame.size.width, 0);
            //数据重新赋予
            //中间数据
            __weak typeof(self)weakSelf = self;
            [self changeCurrentMonth:_date andIndex:1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.centerCollectionView.date = nowDate;
                self.centerCollectionView.allDayArray = [self currentMonthArray:nowDate];
                [weakSelf.centerBtn setTitle:showMonth forState:UIControlStateNormal];
    
                weakSelf.date = nowDate;
            }];
    
    
            //左侧
            [self changeCurrentMonth:_date andIndex:-1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.leftCollectionView.date = nowDate;
                self.leftCollectionView.allDayArray = [self currentMonthArray:nowDate];
            }];
    
            //右侧
            [self changeCurrentMonth:_date andIndex:1 resultData:^(NSDate *nowDate, NSString *showMonth) {
                self.rightCollectionView.date = nowDate;
                self.rightCollectionView.allDayArray = [self currentMonthArray:nowDate];
            }];
        }
    }
    @end

# 结语 #

我希望的是你可以根据我的代码思路，自己写出这一功能的代码。而不是让你直接command＋c，command＋v。请不要要你很忙，没有时间。Cheat ghost 。

[Demo]: https://github.com/sunyunfei/YFCalendar.git
[20160524134210963]: /images/20220722/f4615b6ec5684bf3b1212a316d7a4625.png