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POUICollectionView doesn't update immediately when calling reloadData, but randomly after 30-60 seconds
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copied!<p>As the title implies, my <code>UICollectionView</code> doesn't update and display the cells immediately after calling <code>reloadData</code>. Instead, it seems to eventually update my collection view after 30-60 seconds. My setup is as follows:</p> <p><code>UICollectionView</code> added to view controller in Storyboard with both <code>delegate</code> and <code>dataSource</code> setup for the view controller and standard outlet setup <code>numberOfSectionsInRow</code> & <code>cellForItemAtIndexPath</code> are both implemented and reference the prototyped cell and the <code>imageView</code> inside of it</p> <p>Here is the code that goes to Twitter, get's a timeline, assigns it to a variable, reloads a table view with the tweets and then goes through the tweets to find photos and reloads the collection view with those items.</p> <p>Even if I comment out the code to display the image, it still doesn't change anything.</p> <pre><code>SLRequest *timelineRequest = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:timelineURL parameters:timelineParams]; [timelineRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) { if(responseData) { JSONDecoder *decoder = [[JSONDecoder alloc] init]; NSArray *timeline = [decoder objectWithData:responseData]; [self setTwitterTableData:timeline]; for(NSDictionary *tweet in [self twitterTableData]) { if(![tweet valueForKeyPath:@"entities.media"]) { continue; } for(NSDictionary *photo in [[tweet objectForKey:@"entities"] objectForKey:@"media"]) { [[self photoStreamArray] addObject:[NSDictionary dictionaryWithObjectsAndKeys: [photo objectForKey:@"media_url"], @"url", [NSValue valueWithCGSize:CGSizeMake([[photo valueForKeyPath:@"sizes.large.w"] floatValue], [[photo valueForKeyPath:@"sizes.large.h"] floatValue])], @"size" , nil]]; } } [[self photoStreamCollectionView] reloadData]; } }]; </code></pre>

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