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POiOS: NSUserDefaults and UIImageViews
 

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  1. POiOS: NSUserDefaults and UIImageViews
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    <p>I have an application that has an area that is supposed to behave somewhat like a photo gallery. The user chooses a picture from their camera roll, and the photos get displayed in UIImageViews. I'm trying to save the image that they select. I have 9 UIImageView's, and the issue is that when I select a different photo for each UIImageView, close and relaunch the app, all of the UIImageViews are blank. Here is the code that I'm working with:</p> <pre><code>- (void)viewWillAppear:(BOOL)animated { self.user = [NSUserDefaults standardUserDefaults]; NSMutableArray* array = [[self.user objectForKey:@"images"]mutableCopy]; while(array == nil) { [self.user setObject:[NSMutableArray arrayWithObject:@""] forKey:@"images"]; array = [[self.user objectForKey:@"images"]mutableCopy]; NSLog(@"%@",@"attempting to create an array to store the images in"); } } - (void)applicationDidEnterBackground:(UIApplication*)application { NSLog(@"Image on didenterbackground: %@", imageView); NSMutableArray* array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView3.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView4.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView5.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView6.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView7.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView8.image)]]; [array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView9.image)]]; [self.user setObject:array forKey:@"images"]; } - (void)viewDidLoad { NSMutableArray* array = [[self.user objectForKey:@"images"]mutableCopy]; imageView.image = [[UIImage alloc] initWithData:[array objectAtIndex:0]]; imageView2.image = [[UIImage alloc] initWithData:[array objectAtIndex:1]]; imageView3.image = [[UIImage alloc] initWithData:[array objectAtIndex:2]]; imageView4.image = [[UIImage alloc] initWithData:[array objectAtIndex:3]]; imageView5.image = [[UIImage alloc] initWithData:[array objectAtIndex:4]]; imageView6.image = [[UIImage alloc] initWithData:[array objectAtIndex:5]]; imageView7.image = [[UIImage alloc] initWithData:[array objectAtIndex:6]]; imageView8.image = [[UIImage alloc] initWithData:[array objectAtIndex:7]]; imageView9.image = [[UIImage alloc] initWithData:[array objectAtIndex:8]]; UIApplication *app = [UIApplication sharedApplication]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidEnterBackground:) name:UIApplicationDidEnterBackgroundNotification object:app]; [super viewDidLoad]; } - (void)viewDidUnload { self.user = nil; } </code></pre> <p>Everything looks okay to me, so I can't figure out why they are not saving / loading. Any help is much appreciated, thanks!</p>
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    1. PO
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    1. PTQuestion
    1. This table or related slice is empty.
    1. USHenry F
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    1. This table or related slice is empty.
    1. COmaybe your imageView[1-9] are not initialized when you assign images to them? are they are nil?
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      1. POiOS: NSUserDefaults and UIImageViews
      1. USamleszk
    2. CO@amleszk It appears that they are not nil, each imageView has an image assigned to them.
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      1. POiOS: NSUserDefaults and UIImageViews
      1. USHenry F
    3. COis self.user nil in viewDidLoad?
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      1. POiOS: NSUserDefaults and UIImageViews
      1. USthelaws
 

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