Displaying week of year.

JTCalendar/JTCalendarDelegate.h

@@ -99,6 +99,13 @@
 - (UIView<JTCalendarDay> *)calendarBuildDayView:(JTCalendarManager *)calendar;
 
 
+/*!
+ * Provide a view conforming to `JTCalendarDay` protocol.
+ * Return an instance of `JTCalendarDayView` by default.
+ */
+- (UIView<JTCalendarDay> *)calendarBuildWeekNumberView:(JTCalendarManager *)calendar;
+
+
 // Day view
 
 
@@ -112,4 +119,15 @@
  */
 - (void)calendar:(JTCalendarManager *)calendar didTouchDayView:(UIView<JTCalendarDay> *)dayView;
 
+
+/*!
+ * Used to customize the dayView.
+ */
+- (void)calendar:(JTCalendarManager *)calendar prepareWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView;
+
+/*!
+ * Indicate the dayView just get touched.
+ */
+- (void)calendar:(JTCalendarManager *)calendar didTouchWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView;
+
 @end

JTCalendar/JTCalendarSettings.h

@@ -21,6 +21,8 @@ typedef NS_ENUM(NSInteger, JTCalendarWeekDayFormat) {
 @property (nonatomic) BOOL pageViewHideWhenPossible;
 @property (nonatomic) BOOL weekModeEnabled;
 
+@property (nonatomic) BOOL weekNumber;
+
 
 // Page view
 

JTCalendar/JTCalendarSettings.m

@@ -28,6 +28,7 @@ - (void)commonInit
     _pageViewHaveWeekDaysView = YES;
     _weekDayFormat = JTCalendarWeekDayFormatShort;
     _weekModeEnabled = NO;
+    _weekNumber = YES;
 }
 
 @end

JTCalendar/Managers/JTCalendarDelegateManager.h

@@ -38,11 +38,15 @@
 // Week view
 
 - (UIView<JTCalendarDay> *)buildDayView;
+- (UIView<JTCalendarDay> *)buildWeekNumberView;
 
 
 // Day view
 
 - (void)prepareDayView:(UIView<JTCalendarDay> *)dayView;
 - (void)didTouchDayView:(UIView<JTCalendarDay> *)dayView;
+- (void)prepareWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView;
+- (void)didTouchWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView;
+
 
 @end

JTCalendar/Managers/JTCalendarDelegateManager.m

@@ -13,6 +13,7 @@
 #import "JTCalendarWeekDayView.h"
 #import "JTCalendarWeekView.h"
 #import "JTCalendarDayView.h"
+#import "JTCalendarWeekNumberView.h"
 
 @implementation JTCalendarDelegateManager
 
@@ -145,6 +146,15 @@ - (NSDate *)dateForNextPageWithCurrentDate:(NSDate *)currentDate
     return [JTCalendarDayView new];
 }
 
+- (UIView<JTCalendarDay> *)buildWeekNumberView
+{
+    if(_manager.delegate && [_manager.delegate respondsToSelector:@selector(calendarBuildWeekNumberView:)]){
+        return [_manager.delegate calendarBuildWeekNumberView:self.manager];
+    }
+
+    return [JTCalendarWeekNumberView new];
+}
+
 #pragma mark - Day view
 
 - (void)prepareDayView:(UIView<JTCalendarDay> *)dayView
@@ -161,4 +171,21 @@ - (void)didTouchDayView:(UIView<JTCalendarDay> *)dayView
     }
 }
 
+#pragma mark - Week number view
+
+- (void)prepareWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView
+{
+    if(_manager.delegate && [_manager.delegate respondsToSelector:@selector(calendar:prepareWeekNumberView:)]){
+        [_manager.delegate calendar:self.manager prepareWeekNumberView:weekNumberView];
+    }
+}
+
+- (void)didTouchWeekNumberView:(UIView<JTCalendarDay> *)weekNumberView
+{
+    if(_manager.delegate && [_manager.delegate respondsToSelector:@selector(calendar:didTouchWeekNumberView:)]){
+        [_manager.delegate calendar:self.manager didTouchWeekNumberView:weekNumberView];
+    }
+}
+
+
 @end

JTCalendar/Views/JTCalendarWeekDayView.h

@@ -14,6 +14,7 @@
 @property (nonatomic, weak) JTCalendarManager *manager;
 
 @property (nonatomic, readonly) NSArray *dayViews;
+@property (nonatomic, readonly) UILabel *weekNumberView;
 
 /*!
  * Must be call if override the class

JTCalendar/Views/JTCalendarWeekDayView.m

@@ -41,6 +41,16 @@ - (void)commonInit
 {
     NSMutableArray *dayViews = [NSMutableArray new];
 
+    if (_manager.settings.weekNumber) {
+        UILabel *label = [UILabel new];
+        [self addSubview:label];
+        _weekNumberView = label;
+
+        label.textAlignment = NSTextAlignmentCenter;
+        label.textColor = [UIColor colorWithRed:152./256. green:147./256. blue:157./256. alpha:1.];
+        label.font = [UIFont systemFontOfSize:11];
+    }
+
     for(int i = 0; i < NUMBER_OF_DAY_BY_WEEK; ++i){
         UILabel *label = [UILabel new];
         [self addSubview:label];
@@ -105,10 +115,22 @@ - (void)layoutSubviews
         return;
     }
 
+    int numberOfDays = NUMBER_OF_DAY_BY_WEEK;
+
+    if (_manager.settings.weekNumber) {
+        numberOfDays ++;
+    }
+
     CGFloat x = 0;
-    CGFloat dayWidth = self.frame.size.width / NUMBER_OF_DAY_BY_WEEK;
+    CGFloat dayWidth = self.frame.size.width / numberOfDays;
     CGFloat dayHeight = self.frame.size.height;
 
+    if (_manager.settings.weekNumber) {
+        _weekNumberView.frame = CGRectMake(x, 0, dayWidth, dayHeight);
+        x += dayWidth;
+
+    }
+
     for(UIView *dayView in _dayViews){
         dayView.frame = CGRectMake(x, 0, dayWidth, dayHeight);
         x += dayWidth;

JTCalendar/Views/JTCalendarWeekNumberView.h

@@ -0,0 +1,13 @@
+//
+//  JTCalendarWeekNumberView.h
+//  Pods
+//
+//  Created by SSL on 23/07/15.
+//
+//
+
+#import "JTCalendarDayView.h"
+
+@interface JTCalendarWeekNumberView : JTCalendarDayView<JTCalendarDay>
+
+@end

JTCalendar/Views/JTCalendarWeekNumberView.m

@@ -0,0 +1,36 @@
+//
+//  JTCalendarWeekNumberView.m
+//  Pods
+//
+//  Created by SSL on 23/07/15.
+//
+//
+
+#import "JTCalendarWeekNumberView.h"
+#import "JTCalendarManager.h"
+
+
+@implementation JTCalendarWeekNumberView
+
+- (void)reload
+{
+    static NSCalendar *cal = nil;
+
+    if (!cal) {
+        cal = [NSCalendar currentCalendar];
+    }
+
+    NSDateComponents *components = [cal components:NSWeekOfYearCalendarUnit fromDate:self.date];
+    self.textLabel.text = [NSString stringWithFormat:@"%ld", [components weekOfYear]];
+
+
+    [self.manager.delegateManager prepareWeekNumberView:self];
+}
+
+- (void)didTouch
+{
+    [self.manager.delegateManager didTouchWeekNumberView:self];
+}
+
+
+@end

JTCalendar/Views/JTCalendarWeekView.m

@@ -13,6 +13,7 @@
 
 @interface JTCalendarWeekView (){
     NSMutableArray *_daysViews;
+    UIView<JTCalendarDay> *_weekNumberView;
 }
 
 @end
@@ -66,6 +67,10 @@ - (void)reloadAndUpdateAnotherMonth:(BOOL)enable monthDate:(NSDate *)monthDate
 {
     NSDate *dayDate = _startDate;
 
+    if (_manager.settings.weekNumber) {
+        _weekNumberView.date = dayDate;
+    }
+
     for(UIView<JTCalendarDay> *dayView in _daysViews){
         // Must done before setDate to dayView for `prepareDayView` method
         if(!enable){
@@ -88,6 +93,13 @@ - (void)reloadAndUpdateAnotherMonth:(BOOL)enable monthDate:(NSDate *)monthDate
 - (void)createDayViews
 {
     if(!_daysViews){
+
+        if (_manager.settings.weekNumber) {
+            _weekNumberView = [_manager.delegateManager buildWeekNumberView];
+            _weekNumberView.manager = _manager;
+            [self addSubview:_weekNumberView];
+        }
+
         _daysViews = [NSMutableArray new];
 
         for(int i = 0; i < NUMBER_OF_DAY_BY_WEEK; ++i){
@@ -106,10 +118,21 @@ - (void)layoutSubviews
         return;
     }
 
+    int numberOfDays = NUMBER_OF_DAY_BY_WEEK;
+
+    if (_manager.settings.weekNumber) {
+        numberOfDays ++;
+    }
+
     CGFloat x = 0;
-    CGFloat dayWidth = self.frame.size.width / NUMBER_OF_DAY_BY_WEEK;
+    CGFloat dayWidth = self.frame.size.width / numberOfDays;
     CGFloat dayHeight = self.frame.size.height;
 
+    if (_manager.settings.weekNumber) {
+        _weekNumberView.frame = CGRectMake(x, 0, dayWidth, dayHeight);
+        x += dayWidth;
+    }
+
     for(UIView *dayView in _daysViews){
         dayView.frame = CGRectMake(x, 0, dayWidth, dayHeight);
         x += dayWidth;