ios 日历简单制作和可选择某段特定时间NSCalendar 和NSDate

来源：互联网发布：linux和windows换行符编辑：程序博客网时间：2024/05/23 01:44
最近做项目需要制作一个活动报名的页面。其中需要定制一个简单的日历表来活动报名，大概效果
这里写图片描述
活动选择时间时根据当前时间之后7天的7天内可以活动报名
#define CURRENT_Date [NSDate date]#import "CalendarVC.h"@interface CalendarVC ()<UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>{    UILabel *_yearLabel;    NSDate *_date;    NSInteger _isCurrentMouth;// 0 当前月(默认)  -1 以前  1 后一个月  -1 后面不可用    NSInteger _day;//当前日子;    NSInteger _spaceDay;//当前月份活动天数;}@property (nonatomic, strong) UICollectionView *collectionView;@end@implementation CalendarVC- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.    self.view.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1];    UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, 60)];    backView.backgroundColor = [UIColor colorWithWhite:0.5 alpha:1];    [self.view addSubview:backView];    UIButton *lastButton = [[UIButton alloc] initWithFrame:CGRectMake(5, 2, 80, 30)];    lastButton.titleLabel.font = [UIFont systemFontOfSize:14];    [lastButton setTitle:@"上一月" forState:UIControlStateNormal];    [backView addSubview:lastButton];    [lastButton addTarget:self action:@selector(clcikLastButton) forControlEvents:UIControlEventTouchUpInside];    UIButton *nextButton = [[UIButton alloc] initWithFrame:CGRectMake(self.view.frame.size.width - 85, 2, 80, 30)];    [nextButton setTitle:@"下一月" forState:UIControlStateNormal];    [backView addSubview:nextButton];    nextButton.titleLabel.font = [UIFont systemFontOfSize:14];    [nextButton addTarget:self action:@selector(clickNextButton) forControlEvents:UIControlEventTouchUpInside];    _yearLabel = [[UILabel alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 100 ) / 2, 0, 100, 35)];    _yearLabel.font = [UIFont systemFontOfSize:14];    [backView addSubview:_yearLabel];//    _yearLabel.center = backView.center;    _date = CURRENT_Date;    _yearLabel.text = [NSString stringWithFormat:@"%ld年%ld月",[self yearWithDate:_date],[self monthWithDate:_date] ];    _yearLabel.textColor = [UIColor whiteColor];    _yearLabel.backgroundColor = [UIColor orangeColor];    _yearLabel.textAlignment = NSTextAlignmentCenter;    NSArray *array = @[@"日",@"一",@"二",@"三",@"四",@"五",@"六"];    for (NSInteger i = 0; i < 7; i ++) {        CGFloat space = self.view.frame.size.width / array.count;        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(space * i, 35, space, 25)];        label.font = [UIFont systemFontOfSize:14];        label.backgroundColor = [UIColor colorWithWhite:0.3 alpha:1];        [backView addSubview:label];        label.textColor = [UIColor whiteColor];        label.text = array[i];        label.textAlignment = NSTextAlignmentCenter;    }    [self.view addSubview:self.collectionView];    [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];    self.collectionView.delegate = self;    self.collectionView.dataSource = self;    _isCurrentMouth = 0;    _day = [self dayWithDate:CURRENT_Date];    _spaceDay = [self numberOfDaysInCurrentMonthWithDate:CURRENT_Date] - _day;}- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{    return 42;}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];    cell.backgroundColor = [UIColor lightGrayColor];    for (UIView *view in cell.contentView.subviews) {        [view removeFromSuperview];    }    if (indexPath.row >= [self firstWeekDayInMonthWithDate:_date] && indexPath.row <= ([self numberOfDaysInCurrentMonthWithDate:_date] + [self firstWeekDayInMonthWithDate:_date] - 1)) {        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width / 7, 50)];        [button setTitle:[NSString stringWithFormat:@"%ld", indexPath.row - [self firstWeekDayInMonthWithDate:_date] + 1] forState:UIControlStateNormal];        [cell.contentView addSubview:button];        button.tag = 100 + [[button titleForState:UIControlStateNormal] integerValue];        button.enabled = NO;        if (_isCurrentMouth == 0 ) {//当月            if (button.tag > 100 + _day + 6 && button.tag < 100 + _day + 14 ) {//可以选的日期                button.enabled = YES;                button.backgroundColor = [UIColor orangeColor];            }        } else if (_isCurrentMouth == 1) {            if (_spaceDay < 7) {                if (button.tag < 100 -_spaceDay + 14 && button.tag >= 100 + 7 - _spaceDay) {                    button.enabled = YES;                    button.backgroundColor = [UIColor orangeColor];                }            } else {                if (button.tag < 100 -_spaceDay + 14) {                    button.enabled = YES;                    button.backgroundColor = [UIColor orangeColor];                }            }        }    }    return cell;}- (UICollectionView *)collectionView{    if (!_collectionView) {        CGFloat wide = self.view.frame.size.width;        UICollectionViewFlowLayout *layou = [[UICollectionViewFlowLayout alloc] init];        layou.itemSize = CGSizeMake((wide - 7) / 7, 50);        layou.minimumLineSpacing = 1;        layou.minimumInteritemSpacing = 1;        _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 150, wide, 300) collectionViewLayout:layou];    }    return _collectionView;}-(NSInteger )yearWithDate:(NSDate *)date {    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];    NSDateComponents *components = [gregorian components:NSCalendarUnitYear fromDate:date];    return [components year];}//获取当前的月-(NSInteger )monthWithDate:(NSDate *)date  {    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];    NSDateComponents *components = [gregorian components:NSCalendarUnitMonth fromDate:date];    return [components month];}//获取当前的日-(NSInteger )dayWithDate:(NSDate *)date  {    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];    NSDateComponents *components = [gregorian components:NSCalendarUnitDay fromDate:date];    return [components day];}//获取当前月有多少天- (NSUInteger)numberOfDaysInCurrentMonthWithDate:(NSDate *)date{    // 频繁调用 [NSCalendar currentCalendar] 可能存在性能问题    NSCalendar *canlendar = [NSCalendar currentCalendar];   return [canlendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date].length;}//获得当月的第一天为星期几-(NSInteger )firstWeekDayInMonthWithDate:(NSDate *)date {    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];    [gregorian setFirstWeekday:1];    NSDateComponents *comps = [gregorian components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:date];    [comps setDay:1];    NSDate *newDate = [gregorian dateFromComponents:comps];    NSInteger inte = [gregorian ordinalityOfUnit:NSCalendarUnitWeekday inUnit:NSCalendarUnitWeekOfMonth forDate:newDate];    return (inte - 1);}//减去第一周的天数，剩余天数除以7，得到倍数和余数, 获得一个月有几周- (NSUInteger)numberOfWeeksInCurrentMonthWithDate:(NSDate *)date{    NSUInteger weeks = 0;    NSUInteger weekday = [self firstWeekDayInMonthWithDate:date];    if (weekday > 0) {        weeks += 1;    }    NSUInteger monthDays = [self numberOfDaysInCurrentMonthWithDate:date];    weeks = weeks + (monthDays - 7 + weekday )/7;    if ((monthDays - 7 + weekday) % 7 > 0) {        weeks += 1;    }    return weeks;}- (void)clcikLastButton{    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];   NSDateComponents *comps = [gregorian components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:_date];    [comps setMonth:([comps month] - 1)];    _date = [gregorian dateFromComponents:comps];    [self setDayStyle];}- (void)clickNextButton{    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];    NSDateComponents *comps = [gregorian components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:_date];    [comps setMonth:([comps month] + 1)];    _date = [gregorian dateFromComponents:comps];    [self setDayStyle];}#pragma mark -设置活动时间有效性- (void) setDayStyle{    NSDate *date = CURRENT_Date;    NSInteger year = [self yearWithDate: date];    NSInteger mouth = [self monthWithDate:date];    NSInteger newYear = [self yearWithDate:_date];    NSInteger newMonth = [self monthWithDate:_date];    if (newYear < year) {        _isCurrentMouth = -1;    } else if (newYear == year) {        if (newMonth == mouth) {            _isCurrentMouth = 0;        } else if (newMonth == mouth + 1) {            _isCurrentMouth = 1;        } else {            _isCurrentMouth = -1;        }    } else if (newYear > year && newMonth == 1 && mouth == 12) {        if (_spaceDay > 13) {            _isCurrentMouth = -1;        } else {            _isCurrentMouth = 1;        }    } else {        _isCurrentMouth = -1;    }    NSString *newDate = [NSString stringWithFormat:@"%ld年%ld月",newYear, newMonth];    _yearLabel.text = newDate;    [self.collectionView reloadData];}
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