StackOverflow2013

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POFetching image from iOS CoreData
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copied!<p>I have a Core Data entity defined with an <code>NSData</code> property <code>imageData</code>. I have a setter and getter setup for <code>image</code> on the entity.</p> <p>The setter, <code>setImage</code>, just calls <code>[self setImageData:UIImagePNGRepresentation(img)];</code> The getter, <code>image</code>, just returns <code>[UIImage imageWithData:[self imageData]];</code></p> <p>When I create a new entity and my fetched results controller loads the new table row, <strong>the image always pulls null</strong>. However, <strong>if I tap the row to go to the next view controller, the image shows up just fine</strong>.</p> <p>What can I do to make it show the image immediately after the save occurs and the fetchResultsController updates with the new row.</p> <p>EDIT: Adding code</p> <p>Core data header and getter/setter for image snippet</p> <pre><code>.h @property (nonatomic, retain) NSData * imageData; @property (nonatomic, retain) UIImage *image; .m - (void)setImage:(UIImage *)image { NSData *data = UIImagePNGRepresentation(image); [self setImageData:data]; } - (UIImage *)image { return [UIImage imageWithData:[self imageData]]; } </code></pre> <p>Table view code</p> <pre><code>- (NSFetchedResultsController *)fetchedResultsController { if (_fetchedResultsController != nil) { return _fetchedResultsController; } [NSFetchedResultsController deleteCacheWithName:@"Artists"]; NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"ArtistModel" inManagedObjectContext:[[BKDataManager sharedInstance] mainObjectContext]]; [fetchRequest setEntity:entity]; NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sort]]; [fetchRequest setFetchBatchSize:20]; _fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:[[BKDataManager sharedInstance] mainObjectContext] sectionNameKeyPath:nil cacheName:@"Artists"]; _fetchedResultsController.delegate = self; return _fetchedResultsController; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { ArtistTableViewCell *cell = (ArtistTableViewCell *)[tableView dequeueReusableCellWithIdentifier:@"ArtistsTableViewCell"]; if(!cell) { cell = (ArtistTableViewCell *)[[[UINib nibWithNibName:@"ArtistTableViewCell" bundle:nil] instantiateWithOwner:nil options:nil] objectAtIndex:0]; } ArtistModel *row = [[self fetchedResultsController] objectAtIndexPath:indexPath]; [[cell artistNameLabel] setText:[row name]]; [[cell artistImageView] setImage:[row image]]; // This is where it pulls from the artist model return cell; } </code></pre> <p>Saving to core data bit</p> <pre><code>- (void)addArtistWithName:(NSString *)name confirmed:(BOOL)confirmed managedContext:(NSManagedObjectContext *)managedContext success:(BKClientIdResult)success failure:(BKClientError)failure { NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys: name, @"name", [NSNumber numberWithBool:confirmed], @"confirmed" , nil]; [[BKClient sharedInstance] postPath:@"/users/artists" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) { if([[responseObject objectForKey:@"status"] boolValue]) { NSDictionary *result = [responseObject valueForKeyPath:@"payload.artist"]; ArtistModel *artistModel = (ArtistModel *)[NSEntityDescription insertNewObjectForEntityForName:@"ArtistModel" inManagedObjectContext:managedContext]; [artistModel setName:[result objectForKey:@"name"]]; NSURLRequest *imageRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:[result objectForKey:@"image"]]]; AFImageRequestOperation *op = [AFImageRequestOperation imageRequestOperationWithRequest:imageRequest imageProcessingBlock:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) { [artistModel setImage:image]; [managedContext save:nil]; if(success) { success(artistModel); } } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) { // TODO FIX }]; [op start]; } else { if(failure) { failure([NSError errorWithDomain:@"com.nf" code:0 userInfo:[responseObject objectForKey:@"error"]]); } } } failure:^(AFHTTPRequestOperation *operation, NSError *error) { if(failure) { failure(error); } }]; } </code></pre>

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