iOS簡(jiǎn)約日歷控件EBCalendarView的實(shí)現(xiàn)代碼

EBCalendarView *calendarView = [[EBCalendarView alloc] initWithFrame:CGRectMake(0, 64, CGRectGetWidth(self.view.bounds), 0)];
  calendarView.delegate = self;
  //calendarView.maxLastMonths = 0; 
  //calendarView.maxNextMonths = 0;
  [self.view addSubview:calendarView];
- (void)calendarView:(EBCalendarView*)calendarView didSelectedDate:(NSDate*)date {
  NSLog(@"選中日期:%@", [date stringWithFormat:@"yyyy-MM-dd"]);
}

_collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout];
    _collectionView.dataSource = self;
    _collectionView.delegate = self;
    _collectionView.showsVerticalScrollIndicator = NO;
    _collectionView.showsHorizontalScrollIndicator = NO;
    _collectionView.backgroundColor = [UIColor whiteColor];
    [_collectionView registerClass:[EBCalendarDayCell class] forCellWithReuseIdentifier:kEBCalendarViewReuseIdentifier];

// 小數(shù)向上取整
  NSInteger rows = ceilf(_dates.count / kEBCalendarViewCellColumn);
  self.frame = ({
    CGRect frame = self.frame;
    frame.size.height = kEBCalendarViewWeekViewHeight + kEBCalenderNavigationViewHeight + (rows * kEBCalendarViewCellHeight);
    frame;
  });

- (NSDate *)dateByAddingMonths:(NSInteger)months {
  NSCalendar *calendar = [NSCalendar currentCalendar];
  NSDateComponents *components = [[NSDateComponents alloc] init];
  [components setMonth:months];
  return [calendar dateByAddingComponents:components toDate:self options:0];
}

@property (nonatomic, assign) NSInteger year;
@property (nonatomic, assign) NSInteger month;
@property (nonatomic, assign) NSInteger day;
// 記錄選中狀態(tài)
@property (nonatomic, assign, getter=isSelected) BOOL selected;
// 是否為當(dāng)天
@property (nonatomic, assign, getter=isToday) BOOL today;
// 將year，month，day轉(zhuǎn)換成NSDate
@property (nonatomic, strong, readonly) NSDate *date;
- (NSDate*)date {
  if (_year == 0 || _month == 0 || _day == 0) {
    return nil;
  }
  return [NSDate dateWithString:[NSString stringWithFormat:@"%zd-%zd-%zd"
              , _year
              , _month
              , _day] format:@"yyyy-MM-dd"];
}

- (void)layoutSubviews {
  [super layoutSubviews];
  [self createWeekView];
}

- (void)setWeeks:(NSArray *)weeks {
  _weeks = weeks;
  [self createWeekView];
}

- (void)createWeekView {
  CGFloat viewWidth = CGRectGetWidth(self.bounds)
  , viewHeight = CGRectGetHeight(self.bounds);
  if (_weeks.count == 0 || viewHeight == 0) return;
  [self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
  NSInteger weekCount = _weeks.count;
  CGFloat weekWidth = viewWidth / weekCount;
  for (int n = 0; n < weekCount; n ++ ) {
    NSString *week = _weeks[n];
    UILabel *weekLabel = [[UILabel alloc] initWithFrame:CGRectMake(weekWidth * n, 0, weekWidth, viewHeight)];
    weekLabel.font = [UIFont systemFontOfSize:14];
    weekLabel.textColor = [UIColor colorWithHexString:@"333333"];
    weekLabel.textAlignment = NSTextAlignmentCenter;
    weekLabel.text = week;
    [self addSubview:weekLabel];
  }
}

- (void)changeMonthAction:(UIButton*)button {
  BOOL isNextMonth = NO;
  if ([button isEqual:_nextMonthButton]) {
    // 下個(gè)月
    isNextMonth = YES;
  }
  if ([self.delegate respondsToSelector:@selector(calenderNavigationViewDidChangeMonth:isNextMonth:)]) {
    [self.delegate calenderNavigationViewDidChangeMonth:self isNextMonth:isNextMonth];
  }
}

+ (UIColor *)colorWithHexString:(NSString *)hexString {
  NSScanner *scanner = [NSScanner scannerWithString:hexString];
  unsigned hexNum;
  if (![scanner scanHexInt:&hexNum]) return nil;
  return [UIColor colorWithRGBHex:hexNum];
}

+ (UIColor *)colorWithRGBHex:(UInt32)hex {
  int r = (hex >> 16) & 0xFF;
  int g = (hex >> 8) & 0xFF;
  int b = (hex) & 0xFF;
  
  return [UIColor colorWithRed:r / 255.0f
              green:g / 255.0f
              blue:b / 255.0f
              alpha:1.0f];
}

// 該方法來(lái)源自YYKit
- (NSInteger)year;

// 該方法來(lái)源自YYKit
- (NSInteger)month;

// 該方法來(lái)源自YYKit
- (NSInteger)day;

// 該方法來(lái)源自YYKit
- (NSInteger)weekday;

// 該方法來(lái)源自YYKit
- (BOOL)isToday;

// 當(dāng)前月有多少天
- (NSUInteger)numberOfDaysInMonth;

// 該方法來(lái)源自YYKit
- (NSString *)stringWithFormat:(NSString *)format;

// 該方法來(lái)源自YYKit
- (NSDate *)dateByAddingMonths:(NSInteger)months;

// 該方法來(lái)源自YYKit
+ (NSDate *)dateWithString:(NSString *)dateString format:(NSString *)format;