Showing two images in one ViewController picked with UIImagePickerController from different buttons

#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
// enum definition
typedef enum {
    CurrentImageCategoryAvatar = 0,
    CurrentImageCategoryCover
}CurrentImageCategory;

@interface HBProfileViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> // I didn't use here UIActionSheetDeelegate, but it works.
{

}

@property (weak, nonatomic) IBOutlet UIImageView *cover; // cover photo
@property (weak, nonatomic) IBOutlet UIImageView *avatar; // avatar photo
@property (weak, nonatomic) IBOutlet UILabel *usernameLabel; // outlet for displaying current username.

@property (nonatomic, weak) UIImagePickerController *imagePicker;
@property (nonatomic, weak) UIImage *image;

// I used two different actions for each button.
- (IBAction)changeAvatar:(id)sender;
- (IBAction)changeUserCover:(id)sender;

@end

#import "HBProfileViewController.h"
#import <Parse/Parse.h>

@interface HBProfileViewController ()
@end

@implementation HBProfileViewController

@synthesize cover, avatar, usernameLabel, imagePicker, image;

- (void)viewDidLoad
{
    [super viewDidLoad];
    PFUser *currentUser = [PFUser currentUser];
    if (currentUser) {
    self.usernameLabel.text = currentUser.username;
    }    
}

#pragma mark - Button to change user's avatar

// code "change avatar button" is below
- (IBAction)changeAvatar:(id)sender{

    [[NSUserDefaults standardUserDefaults] setInteger:CurrentImageCategoryAvatar forKey:@"currentImageCategory"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Set your avatar" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Choose existing photo", @"Take new photo", nil];
    [actionSheet showInView:self.view];
}

// actionSheet to "change avatar button"
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0) {

        NSLog(@"The %@ library button was tapped.", [actionSheet buttonTitleAtIndex:buttonIndex]);
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentViewController:picker animated:YES completion:NULL];

     }

    else if (buttonIndex == 1) {

        NSLog(@"The %@ camera button was tapped.", [actionSheet buttonTitleAtIndex:buttonIndex]);
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:picker animated:YES completion:NULL];

    }

}

# pragma mark - Button to change user's cover photo

//button to change user cover
- (IBAction)changeUserCover:(id)sender {

    [[NSUserDefaults standardUserDefaults] setInteger:CurrentImageCategoryCover forKey:@"currentImageCategory"];
    [[NSUserDefaults standardUserDefaults] synchronize];


    UIActionSheet *userCoverActionSheet = [[UIActionSheet alloc] initWithTitle:@"Set your cover photo" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Choose existing photo", @"Take new photo", nil];
    [userCoverActionSheet showInView:self.view];
}

// actionSheet to change user cover with the second picker
- (void)userCoverActionSheet:(UIActionSheet *)userCoverActionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

    if (buttonIndex == 0) {


        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentViewController:picker animated:YES completion:NULL];

    }

    else if (buttonIndex == 1) {

        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:picker animated:YES completion:NULL];
    }
}

# pragma mark - Image picker controller delegate methods

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
    if([[NSUserDefaults standardUserDefaults] integerForKey:@"currentImageCategory"] == CurrentImageCategoryAvatar)
    {
        // Set image to avatar
        self.avatar.image = chosenImage;
    }
    else if([[NSUserDefaults standardUserDefaults] integerForKey:@"currentImageCategory"] == CurrentImageCategoryCover)
    {
        // Set image to cover
        self.cover.image = chosenImage;
    }




    [picker dismissViewControllerAnimated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [picker dismissViewControllerAnimated:YES completion:NULL];
}

@end