How to clear this error: Thread 1: EXC_BAD_ACCESS (code=2, address=0x8)

@protocol MADayViewDataSource, MADayViewDelegate;
@interface Trainer_Profile_Page : UIViewController{
    UIImageView *_topBackground;
	UIButton *_leftArrow, *_rightArrow;
	UILabel *_dateLabel;
	
	unsigned int _labelFontSize;
	UIFont *_regularFont;
	UIFont *_boldFont;
	
	NSDate *day1;
	
	UISwipeGestureRecognizer *_swipeLeftRecognizer, *_swipeRightRecognizer;
	
	id<MADayViewDataSource> __unsafe_unretained _dataSource;
	id<MADayViewDelegate> __unsafe_unretained _delegate;
    

}

@property (readwrite,assign) unsigned int labelFontSize;
@property (nonatomic,copy) NSDate *day;
@property (nonatomic,unsafe_unretained) IBOutlet id<MADayViewDataSource> dataSource;
@property (nonatomic,unsafe_unretained) IBOutlet id<MADayViewDelegate> delegate;

@end

#import "Trainer_Profile_Page.h"
#import <QuartzCore/QuartzCore.h>

static NSString *TOP_BACKGROUND_IMAGE                    = @"ma_topBackground.png";
static NSString *LEFT_ARROW_IMAGE                        = @"ma_leftArrow.png";
static NSString *RIGHT_ARROW_IMAGE                       = @"ma_rightArrow.png";
static const unsigned int ARROW_LEFT                     = 100;
static const unsigned int ARROW_RIGHT                    = 101;
static const unsigned int ARROW_WIDTH                    = 48;
static const unsigned int ARROW_HEIGHT                   = 38;
static const unsigned int TOP_BACKGROUND_HEIGHT          = 95;

//#define DATE_COMPONENTS (NSYearCalendarUnit| NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekCalendarUnit |  NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSWeekdayCalendarUnit | NSWeekdayOrdinalCalendarUnit)
#define CURRENT_CALENDAR [NSCalendar currentCalendar]
#define DATE_COMPONENTS (NSYearCalendarUnit| NSMonthCalendarUnit | NSDayCalendarUnit)



@interface Trainer_Profile_Page ()

- (void)changeDay:(UIButton *)sender;
- (NSDate *)nextDayFromDate:(NSDate *)date;
- (NSDate *)previousDayFromDate:(NSDate *)date;

@property (readonly) UIImageView *topBackground;
@property (readonly) UIButton *leftArrow;
@property (readonly) UIButton *rightArrow;
@property (readonly) UILabel *dateLabel;

@property (readonly) UIFont *regularFont;
@property (readonly) UIFont *boldFont;
@property (readonly) NSString *titleText;

@end

@implementation Trainer_Profile_Page

@synthesize labelFontSize=_labelFontSize;
@synthesize delegate=_delegate;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

-(void)viewWillAppear:(BOOL)animated
{
     
    [[self navigationController] setNavigationBarHidden:YES animated:NO];
}


- (UIImageView *)topBackground {
	if (!_topBackground) {
		_topBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:TOP_BACKGROUND_IMAGE]];
	}
	return _topBackground;
}

- (UIButton *)leftArrow {
	if (!_leftArrow) {
		_leftArrow = [UIButton buttonWithType:UIButtonTypeCustom];
		_leftArrow.tag = ARROW_LEFT;
		[_leftArrow setImage:[UIImage imageNamed:LEFT_ARROW_IMAGE] forState:0];
		[_leftArrow addTarget:self action:@selector(changeDay:) forControlEvents:UIControlEventTouchUpInside];
	}
	return _leftArrow;
}

- (UIButton *)rightArrow {
	if (!_rightArrow) {
		_rightArrow = [UIButton buttonWithType:UIButtonTypeCustom];
		_rightArrow.tag = ARROW_RIGHT;
		[_rightArrow setImage:[UIImage imageNamed:RIGHT_ARROW_IMAGE] forState:0];
		[_rightArrow addTarget:self action:@selector(changeDay:) forControlEvents:UIControlEventTouchUpInside];
	}
	return _rightArrow;
}

- (UILabel *)dateLabel {
	if (!_dateLabel) {
		_dateLabel = [[UILabel alloc] init];
		_dateLabel.textAlignment = NSTextAlignmentCenter;
		_dateLabel.backgroundColor = [UIColor clearColor];
		_dateLabel.font = [UIFont boldSystemFontOfSize:18];
		_dateLabel.textColor = [UIColor colorWithRed:59/255. green:73/255. blue:88/255. alpha:1];
	}
	return _dateLabel;
}



- (void)setDataSource:(id <MADayViewDataSource>)dataSource {
	_dataSource = dataSource;
	//[self reloadData];
}

- (id <MADayViewDataSource>)dataSource {
	return _dataSource;
}

- (void)setDay:(NSDate *)date {
	NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];
	day1 = [CURRENT_CALENDAR dateFromComponents:components];
	self.dateLabel.text = [self titleText];
	
    //  NSLog(@"%@",self.dateLabel.text);
    //	[self reloadData];
}

 - (NSDate *)day {
 NSDate *date = [day1 copy];
 return date;
 }
 

- (void)changeDay:(UIButton *)sender {
    NSLog(@"day1: %@",day1);
	if (ARROW_LEFT == sender.tag) {
		self.day = [self previousDayFromDate:day1];
	} else if (ARROW_RIGHT == sender.tag) {
        
		self.day = [self nextDayFromDate:day1];
	}
    
}

- (NSDate *)nextDayFromDate:(NSDate *)date {
	NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];
	[components setDay:[components day] + 1];
	return [CURRENT_CALENDAR dateFromComponents:components];
}

- (NSDate *)previousDayFromDate:(NSDate *)date {
	NSDateComponents *components = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:date];
	[components setDay:[components day] - 1];
	return [CURRENT_CALENDAR dateFromComponents:components];
}

- (NSString *)titleText {
	NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MM/dd/yyyy"];
	return [NSString stringWithFormat:@"%@",
			[formatter stringFromDate:day1]];
}

- (void)viewDidLoad
{
    self.rightArrow.frame = CGRectMake(280, 60, 20, 20);
    [self.view addSubview:_rightArrow];
    
    self.leftArrow.frame = CGRectMake(10, 60, 20, 20);
    [self.view addSubview:_leftArrow];
    
    self.day = [NSDate date];
    
    [self.view addSubview:_dateLabel];
    self.dateLabel.frame = CGRectMake(60, 0, 200, 150);
    
    self.topBackground.frame = CGRectMake(0, 0, 320, 45);
	[self.view addSubview:_topBackground];
	
    [super viewDidLoad];
	
}
@end

- (void)changeDay:(UIButton *)sender {
    NSLog(@"day1: %@",day1);
	if (ARROW_LEFT == sender.tag) {
		self.day = [self previousDayFromDate:day1];
	} else if (ARROW_RIGHT == sender.tag) {
        
		self.day = [self nextDayFromDate:day1];
	}
    
}