Initial commit

.gitignore

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+.DS_Store
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+*.xcworkspace
+!default.xcworkspace
+xcuserdata
+profile
+*.moved-aside
+DerivedData
+.idea/
+Pods/

Calendar/AppDelegate.h

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+//
+//  AppDelegate.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+@end

Calendar/AppDelegate.m

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+//
+//  AppDelegate.m
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import "AppDelegate.h"
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
+{
+    return YES;
+}
+
+@end

Calendar/Calendar-Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.olebegemann.${PRODUCT_NAME:rfc1034identifier}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIMainStoryboardFile</key>
+	<string>MainStoryboard</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

Calendar/Calendar-Prefix.pch

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+//
+// Prefix header for all source files of the 'Calendar' target in the 'Calendar' project
+//
+
+#import <Availability.h>
+
+#ifndef __IPHONE_5_0
+#warning "This project uses features only available in iOS SDK 5.0 and later."
+#endif
+
+#ifdef __OBJC__
+    #import <UIKit/UIKit.h>
+    #import <Foundation/Foundation.h>
+#endif

Calendar/CalendarDataSource.h

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+//
+//  CalendarDataSource.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "CalendarEvent.h"
+#import "CalendarEventCell.h"
+#import "HeaderView.h"
+
+typedef void (^ConfigureCellBlock)(CalendarEventCell *cell, NSIndexPath *indexPath, id<CalendarEvent> event);
+typedef void (^ConfigureHeaderViewBlock)(HeaderView *headerView, NSString *kind, NSIndexPath *indexPath);
+
+@interface CalendarDataSource : NSObject <UICollectionViewDataSource>
+
+@property (copy, nonatomic) ConfigureCellBlock configureCellBlock;
+@property (copy, nonatomic) ConfigureHeaderViewBlock configureHeaderViewBlock;
+
+- (id<CalendarEvent>)eventAtIndexPath:(NSIndexPath *)indexPath;
+- (NSArray *)indexPathsOfEventsBetweenMinDayIndex:(NSInteger)minDayIndex maxDayIndex:(NSInteger)maxDayIndex minStartHour:(NSInteger)minStartHour maxStartHour:(NSInteger)maxStartHour;
+
+@end

Calendar/CalendarDataSource.m

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+//
+//  CalendarDataSource.m
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import "CalendarDataSource.h"
+#import "SampleCalendarEvent.h"
+
+@interface CalendarDataSource ()
+
+@property (strong, nonatomic) NSMutableArray *events;
+
+@end
+
+@implementation CalendarDataSource
+
+- (void)awakeFromNib
+{
+    _events = [[NSMutableArray alloc] init];
+
+    // Prepare some example events
+    // In a real app, these should be retrieved from the calendar data store (EventKit.framework)
+    // We use a very simple data format for our events. In a real calendar app, event times should be
+    // represented with NSDate objects and correct calendrical date calculcations should be used.
+    [self generateSampleData];
+}
+
+- (void)generateSampleData
+{
+    for (NSUInteger idx = 0; idx < 20; idx++) {
+        SampleCalendarEvent *event = [SampleCalendarEvent randomEvent];
+        [self.events addObject:event];
+    }
+}
+
+#pragma mark - CalendarDataSource
+
+// The layout object calls these methods to identify the events that correspond to
+// a given index path or that are visible in a certain rectangle
+
+- (id<CalendarEvent>)eventAtIndexPath:(NSIndexPath *)indexPath
+{
+    return self.events[indexPath.item];
+}
+
+- (NSArray *)indexPathsOfEventsBetweenMinDayIndex:(NSInteger)minDayIndex maxDayIndex:(NSInteger)maxDayIndex minStartHour:(NSInteger)minStartHour maxStartHour:(NSInteger)maxStartHour
+{
+    NSMutableArray *indexPaths = [NSMutableArray array];
+    [self.events enumerateObjectsUsingBlock:^(id event, NSUInteger idx, BOOL *stop) {
+        if ([event day] >= minDayIndex && [event day] <= maxDayIndex && [event startHour] >= minStartHour && [event startHour] <= maxStartHour)
+        {
+            NSIndexPath *indexPath = [NSIndexPath indexPathForItem:idx inSection:0];
+            [indexPaths addObject:indexPath];
+        }
+    }];
+    return indexPaths;
+}
+
+#pragma mark - UICollectionViewDataSource
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
+{
+    return [self.events count];
+}
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    id<CalendarEvent> event = self.events[indexPath.item];
+    CalendarEventCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CalendarEventCell" forIndexPath:indexPath];
+
+    if (self.configureCellBlock) {
+        self.configureCellBlock(cell, indexPath, event);
+    }
+    return cell;
+}
+
+- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
+{
+    HeaderView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"HeaderView" forIndexPath:indexPath];
+    if (self.configureHeaderViewBlock) {
+        self.configureHeaderViewBlock(headerView, kind, indexPath);
+    }
+    return headerView;
+}
+
+@end

Calendar/CalendarEvent.h

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+//
+//  CalendarEvent.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@protocol CalendarEvent <NSObject>
+
+@property (copy, nonatomic) NSString *title;
+@property (assign, nonatomic) NSInteger day;
+@property (assign, nonatomic) NSInteger startHour;
+@property (assign, nonatomic) NSInteger durationInHours;
+
+@end

Calendar/CalendarEventCell.h

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+//
+//  CalendarEventCell.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface CalendarEventCell : UICollectionViewCell
+
+@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
+
+@end

Calendar/CalendarEventCell.m

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+//
+//  CalendarEventCell.m
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <QuartzCore/QuartzCore.h>
+#import "CalendarEventCell.h"
+
+@implementation CalendarEventCell
+
+- (id)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        [self setup];
+    }
+    return self;
+}
+
+- (id)initWithCoder:(NSCoder *)decoder
+{
+    self = [super initWithCoder:decoder];
+    if (self) {
+        [self setup];
+    }
+    return self;
+}
+
+- (void)setup
+{
+    self.layer.cornerRadius = 10;
+    self.layer.borderWidth = 1.0;
+    self.layer.borderColor = [[UIColor colorWithRed:0 green:0 blue:0.7 alpha:1] CGColor];
+}
+
+@end

Calendar/CalendarViewController.h

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+//
+//  CalendarViewController.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface CalendarViewController : UICollectionViewController
+
+@end

Calendar/CalendarViewController.m

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+//
+//  CalendarViewController.m
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import "CalendarViewController.h"
+#import "CalendarDataSource.h"
+#import "HeaderView.h"
+
+@interface CalendarViewController ()
+
+@property (strong, nonatomic) IBOutlet CalendarDataSource *calendarDataSource;
+
+@end
+
+@implementation CalendarViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    // Register NIB for supplementary views
+    UINib *headerViewNib = [UINib nibWithNibName:@"HeaderView" bundle:nil];
+    [self.collectionView registerNib:headerViewNib forSupplementaryViewOfKind:@"DayHeaderView" withReuseIdentifier:@"HeaderView"];
+    [self.collectionView registerNib:headerViewNib forSupplementaryViewOfKind:@"HourHeaderView" withReuseIdentifier:@"HeaderView"];
+
+    // Define cell and header view configuration
+    CalendarDataSource *dataSource = (CalendarDataSource *)self.collectionView.dataSource;
+    dataSource.configureCellBlock = ^(CalendarEventCell *cell, NSIndexPath *indexPath, id<CalendarEvent> event) {
+        cell.titleLabel.text = event.title;
+    };
+    dataSource.configureHeaderViewBlock = ^(HeaderView *headerView, NSString *kind, NSIndexPath *indexPath) {
+        if ([kind isEqualToString:@"DayHeaderView"]) {
+            headerView.titleLabel.text = [NSString stringWithFormat:@"Day %d", indexPath.item + 1];
+        } else if ([kind isEqualToString:@"HourHeaderView"]) {
+            headerView.titleLabel.text = [NSString stringWithFormat:@"%2d:00", indexPath.item + 1];
+        }
+    };
+}
+
+@end

Calendar/HeaderView.h

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+//
+//  HeaderView.h
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface HeaderView : UICollectionReusableView
+
+@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
+
+@end

Calendar/HeaderView.m

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+//
+//  HeaderView.m
+//  Calendar
+//
+//  Created by Ole Begemann on 29.07.13.
+//  Copyright (c) 2013 Ole Begemann. All rights reserved.
+//
+
+#import "HeaderView.h"
+
+@implementation HeaderView
+
+@end