EBCalendarView日曆控件,調用簡單,代碼簡潔。git
github地址:https://github.com/woheduole/EBCalendarViewgithub
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];
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- (void)calendarView:(EBCalendarView*)calendarView didSelectedDate:(NSDate*)date {
NSLog(@"選中日期:%@", [date stringWithFormat:@"yyyy-MM-dd"]);
}
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_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];
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_flowLayout.itemSize = CGSizeMake(viewWidth / kEBCalendarViewCellColumn, kEBCalendarViewCellHeight);
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經過UICollectionView控件去顯示日期數據,設置UICollectionViewFlowLayout的itemSize,高度能夠固定,寬度就是用視圖的總寬度去除以7。bash
// 小數向上取整
NSInteger rows = ceilf(_dates.count / kEBCalendarViewCellColumn);
self.frame = ({
CGRect frame = self.frame;
frame.size.height = kEBCalendarViewWeekViewHeight + kEBCalenderNavigationViewHeight + (rows * kEBCalendarViewCellHeight);
frame;
});
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切換月份的時候,因爲每個月的1號所在星期是不一致的,會致使行數不同,好比一個月是31天,它的1號是星期日,這時候日期會有6行,若是它的1號是星期一,那麼它會顯示5行,這裏會根據行數去動態的改變其高度。app
- (NSDate *)dateByAddingMonths:(NSInteger)months {
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
[components setMonth:months];
return [calendar dateByAddingComponents:components toDate:self options:0];
}
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月份在累加或累減的時候,經過NSCalendar類直接增長月數,這樣就不用本身去處理2018-12點擊下個月切換到2019-01或者2019-01點擊上個月切換到2018-12的操做了。佈局
@property (nonatomic, assign) NSInteger year;
@property (nonatomic, assign) NSInteger month;
@property (nonatomic, assign) NSInteger day;
// 記錄選中狀態
@property (nonatomic, assign, getter=isSelected) BOOL selected;
// 是否爲當天
@property (nonatomic, assign, getter=isToday) BOOL today;
// 將year,month,day轉換成NSDate
@property (nonatomic, strong, readonly) NSDate *date;
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- (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"];
}
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- (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];
}
}
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根據傳入的參數weeks動態添加UILabel顯示週數據。ui
- (void)changeMonthAction:(UIButton*)button {
BOOL isNextMonth = NO;
if ([button isEqual:_nextMonthButton]) {
// 下個月
isNextMonth = YES;
}
if ([self.delegate respondsToSelector:@selector(calenderNavigationViewDidChangeMonth:isNextMonth:)]) {
[self.delegate calenderNavigationViewDidChangeMonth:self isNextMonth:isNextMonth];
}
}
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這裏面主要就顯示左右箭頭和中間的年月顯示,左右箭頭是兩個UIButton,在點擊它們的時候經過代理把動做給傳到EBCalendarView視圖。atom
+ (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];
}
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代碼中顏色都是用的16進制的顏色值,純屬我的習慣。spa
// 該方法來源自YYKit
- (NSInteger)year;
// 該方法來源自YYKit
- (NSInteger)month;
// 該方法來源自YYKit
- (NSInteger)day;
// 該方法來源自YYKit
- (NSInteger)weekday;
// 該方法來源自YYKit
- (BOOL)isToday;
// 當前月有多少天
- (NSUInteger)numberOfDaysInMonth;
// 該方法來源自YYKit
- (NSString *)stringWithFormat:(NSString *)format;
// 該方法來源自YYKit
- (NSDate *)dateByAddingMonths:(NSInteger)months;
// 該方法來源自YYKit
+ (NSDate *)dateWithString:(NSString *)dateString format:(NSString *)format;
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小結:UICollectionView很強大的一個控件,經過UICollectionViewFlowLayout去重寫佈局,能夠實現不少酷炫的功能。這裏的日曆控件只是設置了item的寬高,屬於很基礎的使用。其中須要注意兩點:1.每月的1號是屬於周幾,而後去設置它的起始位置;2.每月有多少天。app類型不同也會致使日曆控件實際呈現方式不同,基本邏輯都同樣,無非就是一些細微的控制。3d