本文介紹了iOS 簡約日歷控件EBCalendarView的實現(xiàn)代碼,分享給大家,具體如下:
EBCalendarView日歷控件,調(diào)用簡單,代碼簡潔。
github地址:https://github.com/woheduole/EBCalendarView
效果圖
調(diào)用示例
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"]);}
代碼目錄
思路
EBCalendarView
_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];
通過UICollectionView控件去顯示日期數(shù)據(jù),設(shè)置UICollectionViewFlowLayout的itemSize,高度可以固定,寬度就是用視圖的總寬度去除以7。
// 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; });
切換月份的時候,由于每月的1號所在星期是不一致的,會導(dǎo)致行數(shù)不一樣,比如一個月是31天,它的1號是星期日,這時候日期會有6行,如果它的1號是星期一,那么它會顯示5行,這里會根據(jù)行數(shù)去動態(tài)的改變其高度。
- (NSDate *)dateByAddingMonths:(NSInteger)months { NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *components = [[NSDateComponents alloc] init]; [components setMonth:months]; return [calendar dateByAddingComponents:components toDate:self options:0];}
月份在累加或累減的時候,通過NSCalendar類直接增加月數(shù),這樣就不用自己去處理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的操作了。
EBCalendarModel 數(shù)據(jù)模型
@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"];}
EBCalenderWeekView 周視圖
- (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]; }}
根據(jù)傳入的參數(shù)weeks動態(tài)添加UILabel顯示周數(shù)據(jù)。
EBCalenderNavigationView 月份導(dǎo)航視圖
- (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]; }}
這里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,在點擊它們的時候通過代理把動作給傳到EBCalendarView視圖。
UIColor+EBAdd 顏色輔助類
+ (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];}
代碼中顏色都是用的16進制的顏色值,純屬個人習(xí)慣。
NSDate+EBAdd 日期輔助類
// 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(dāng)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;
小結(jié):UICollectionView很強大的一個控件,通過UICollectionViewFlowLayout去重寫布局,可以實現(xiàn)很多酷炫的功能。這里的日歷控件只是設(shè)置了item的寬高,屬于很基礎(chǔ)的使用。其中需要注意兩點:1.每個月的1號是屬于周幾,然后去設(shè)置它的起始位置;2.每個月有多少天。app類型不一樣也會導(dǎo)致日歷控件實際呈現(xiàn)方式不一樣,基本邏輯都一樣,無非就是一些細微的控制。
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