An example of how to use the prior gist

gistfile1.m

coverImage = [[KBImageCacheManager sharedManager] cachedImageForImageObject: imageObject type: imageType];
if ( coverImage == nil )
{
	MAKE_WEAK_SELF();
	_imageObserver = [[imageObject registerImageUpdateObserverUsingBlock: ^(UIImage *image, NSString *imageID, NSString *type) {
		USE_WEAK_SELF();
		self->_coverImageView.image = image;
		[[KBImageCacheManager sharedManager] removeObserver: _imageObserver];
		[_imageObserver release]; _imageObserver = nil;
	}] retain];
}