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    <p>First of all try simplifying your code. Things I did:</p> <ul> <li>Remove the outer dispatch_async. This is not needed, your <code>sendAsynchronousRequest</code> is async already. This also removes the need another <code>__block</code> variable on the queue. </li> <li>You create an image named <code>pImg</code> from the received <code>pData</code>, then convert that back to <code>NSData</code> of type png, and later create another image <code>pImage</code> from that again. Instead of converting over and over, just reuse the first image. You could even write the original <code>pData</code> to disk (unless you really want the png format on disk).</li> </ul> <p>I didn't compile the code below myself, so it might contain a few mistakes. But it is a simpler version that might help solve the leak.</p> <pre><code>- (void) downloadImageInBackgroundWithURL:(NSString*)szUrl { __block typeof(self) bSelf = self; NSAutoreleasePool *pAutoreleasePool = [[NSAutoreleasePool alloc] init]; NSURLRequest *pRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:szUrl] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:URL_REQUEST_TIMEOUT]; [NSURLConnection sendAsynchronousRequest:pRequest queue:m_pRequestQueue completionHandler:^(NSURLResponse *pResponse, NSData *pData, NSError *pError) { NSAutoreleasePool *pPool = [[NSAutoreleasePool alloc] init]; if (pError) { // TODO: handle error return; } // convert image to png format __block UIImage *pImg = [UIImage imageWithData:pData]; // possibly just write pData to disk NSData *pDataPng = UIImagePNGRepresentation(pImg); bool bSaved = [[NSFileManager defaultManager] createFileAtPath:szCacheFile contents:pDataPng attributes:nil]; dispatch_sync( dispatch_get_main_queue(), ^ { // display the image in var pImg }); }]; [pAutoreleasePool drain]; } </code></pre>
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    1. PONSURLConnection sendAsynchronousRequest never free up the memory
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    1. USJoris Kluivers
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    1. COThanks JorisKluivers, your answers helped me realized I was dispatching 2x to fetch the data!
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      1. USZennichimaro
 

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