Saving Images To A Plist With NSUserDefaults

I have an app that behaves like a photo gallery. I'm implementing the ability for the user to delete the photos, by placing an invisible button over each UIImageView, and calling removeObject when they tap on the button. This code is working great, but its dependent upon tags. I need to tag every UIImageView / UIButton in interface builder in order for this to work. So, I'm now trying to save the images. I'm in a pretty strange predicament, if I use NSUserDefaults to save the pictures (I'm storing them in an array), I can delete the images perfectly, but I cant get them to save/load. If I use NSData to save the images in the array, I can save/load the images, but I cant delete them since my current code depends on the UIImageViews tags, which I can't use with NSData.

So I'm totally lost on what to do right now. I'm very, very new to programming and am shocked that I even made it this far. Any help or advice on what or how to edit my code to make this work is much appreciated, thanks!

Here is my entire file just for reference. This is how I grab the images, and how I'm attempting to save / load them:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
     if (imageView.image == nil) {
         imageView.image = img;
 
         [self.array addObject:imageView.image];
 
         [picker dismissModalViewControllerAnimated:YES];
         [self.popover dismissPopoverAnimated:YES];
         return;
 
     }
 
     if (imageView2.image == nil) {
         imageView2.image = img;
 
         [self.array addObject:imageView2.image];
 
         [picker dismissModalViewControllerAnimated:YES];
         [self.popover dismissPopoverAnimated:YES];
         return;
     }
 
     if (imageView3.image == nil) {
         imageView3.image = img;
 
         [self.array addObject:imageView3.image];
 
         [picker dismissModalViewControllerAnimated:YES];
         [self.popover dismissPopoverAnimated:YES];
         return;
     }
 - (void)applicationDidEnterBackground:(UIApplication*)application {
     NSLog(@"Image on didenterbackground: %@", imageView);
 
     [self.array addObject:imageView.image];
     [self.array addObject:imageView2.image];
     [self.array addObject:imageView3.image];
 
     [self.user setObject:self.array forKey:@"images"];
     [user synchronize];
 
 }
 - (void)viewDidLoad
 {
     self.user = [NSUserDefaults standardUserDefaults];
     NSLog(@"It is %@", self.user);
     self.array = [[self.user objectForKey:@"images"]mutableCopy];
     imageView.image = [[self.array objectAtIndex:0] copy];
     imageView2.image = [[self.array objectAtIndex:1] copy];
     imageView3.image = [[self.array objectAtIndex:2] copy];
 
 
 UIApplication *app = [UIApplication sharedApplication];
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(applicationDidEnterBackground:)
                                                  name:UIApplicationDidEnterBackgroundNotification
                                                object:app];
 }
 

Here is how I delete the image when the user taps on the hidden button over the UIImageView:

- (IBAction)deleteButtonPressed:(id)sender {
     NSLog(@"Sender is %@", sender);
     UIAlertView *deleteAlertView = [[UIAlertView alloc] initWithTitle:@"Delete"
                                                               message:@"Are you sure you want to delete this photo?"
                                                              delegate:self
                                                     cancelButtonTitle:@"No"
                                                     otherButtonTitles:@"Yes", nil];
     [deleteAlertView show];
 
     int imageIndex = ((UIButton *)sender).tag;
     deleteAlertView.tag = imageIndex;
 }
 
 - (UIImageView *)viewForTag:(NSInteger)tag {
     UIImageView *found = nil;
     for (UIImageView *view in self.array) {
         if (tag == view.tag) {
             found = view;
             break;
         }
     }
     return found;
 }
 
 - (void)alertView: (UIAlertView *) alertView 
 clickedButtonAtIndex: (NSInteger) buttonIndex
 {
 
 
     if (buttonIndex != [alertView cancelButtonIndex]) {
         NSLog(@"User Clicked Yes. Deleting index %d of %d", alertView.tag, [array count]);
         NSLog(@"The tag is %i", alertView.tag);
 
         UIImageView *view = [self viewForTag:alertView.tag];
         if (view) {
             [self.array removeObject:view];
         }
 
         NSLog(@"After deleting item, array count  = %d", [array count]);
         NSLog(@"Returned view is :%@, in view: %@", [self.view viewWithTag:alertView.tag], self.view);
         ((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
     }
 
     [self.user setObject:self.array forKey:@"images"];
 }
 

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