iOS 7 Calendar with Infinite Scrolling

pod 'RSDayFlow'

#import "RSDFDatePickerView.h"

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    RSDFDatePickerView *datePickerView = [[RSDFDatePickerView alloc] initWithFrame:self.view.bounds];
    datePickerView.delegate = self;
    datePickerView.dataSource = self;
    [self.view addSubview:datePickerView];
}

@interface ViewController () <RSDFDatePickerViewDelegate>

// Returns YES if the date should be highlighted or NO if it should not.
- (BOOL)datePickerView:(RSDFDatePickerView *)view shouldHighlightDate:(NSDate *)date
{
    return YES;
}

// Returns YES if the date should be selected or NO if it should not.
- (BOOL)datePickerView:(RSDFDatePickerView *)view shouldSelectDate:(NSDate *)date
{
    return YES;
}

// Prints out the selected date.
- (void)datePickerView:(RSDFDatePickerView *)view didSelectDate:(NSDate *)date
{
    NSLog(@"%@", [date description]);
}

@interface ViewController () <RSDFDatePickerViewDataSource>

// Returns YES if the date should be marked or NO if it should not.
- (BOOL)datePickerView:(RSDFDatePickerView *)view shouldMarkDate:(NSDate *)date
{
    // The date is an `NSDate` object without time components.
    // So, we need to use dates without time components.
    
    NSCalendar *calendar = [NSCalendar currentCalendar];
    unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;
    NSDateComponents *todayComponents = [calendar components:unitFlags fromDate:[NSDate date]];
    NSDate *today = [calendar dateFromComponents:todayComponents];
    
    return [date isEqual:today];
}

// Returns the color of the default mark image for the specified date.
- (UIColor *)datePickerView:(RSDFDatePickerView *)view markImageColorForDate:(NSDate *)date
{
    if (arc4random() % 2 == 0) {
        return [UIColor grayColor];
    } else {
        return [UIColor greenColor];
    }
}

// Returns the mark image for the specified date.
- (UIImage *)datePickerView:(RSDFDatePickerView *)view markImageForDate:(NSDate *)date
{
    if (arc4random() % 2 == 0) {
        return [UIImage imageNamed:@"img_gray_mark"];
    } else {
        return [UIImage imageNamed:@"img_green_mark"];
    }
}