UIImage caching with Xcode Asset Catalogs

Question

We all know about the mysterious behind-the-scenes caching mechanism of UIImage\'s imageNamed: method. In Apple\'s UIImage Class Reference it says:

Answer 1

UPDATE: Cache eviction works fines (at least since iOS 8.3).

I am running into the same issue (iOS 7.1.1) and I kind of though that @Lukas might be right

There is a high probability that the mistake is not inside Apple's ... caching but in your .. code.

Therefore I have written a very simple Test App (view full source below) where I still see the issue. If you see anything wrong with it, please let the me know about it. I know that it really depends on the image sizes. I only see the issue on an iPad Retina.

  @interface ViewController ()

  @property (nonatomic, strong) UIImageView *imageView;
  @property (nonatomic, strong) NSArray *imageArray;
  @property (nonatomic) NSUInteger   counter;

  @end

  @implementation ViewController

  - (void)viewDidLoad
  {
      [super viewDidLoad];

      self.imageArray = @[@"img1", ...  , @"img568"];
      self.counter = 0;

      UIImage *image = [UIImage imageNamed:[self.imageArray objectAtIndex:self.counter]];
      self.imageView = [[UIImageView alloc] initWithImage: image];
      [self.view addSubview: self.imageView];

      [self performSelector:@selector(loadNextImage) withObject:nil afterDelay:1];
  }

  - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
      NSLog(@"WARN: %s", __PRETTY_FUNCTION__);
  }


  - (void)loadNextImage{

      self.counter++;
      if (self.counter < [self.imageArray count])
      {
          NSLog(@"INFO: %s - %lu - %@",
                __PRETTY_FUNCTION__,
                (unsigned long)self.counter,
                [self.imageArray objectAtIndex:self.counter]);
          UIImage *image = [UIImage imageNamed:[self.imageArray objectAtIndex:self.counter]];
          self.imageView.frame = CGRectMake(0, 0, image.size.width, image.size.height);
          [self.imageView setImage:image];

          [self performSelector:@selector(loadNextImage) withObject:nil afterDelay:0.2];
      } else
      {
          NSLog(@"INFO: %s %@", __PRETTY_FUNCTION__, @"finished");
          [self.imageView removeFromSuperview];
      }
  }
  @end

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Inplace Implementation

I wrote some code to keep the image asset but load it with imageWithData: or imageWithContentsOfFile: use xcassets without imageNamed to prevent memory problems?