Memory Leak in Objective-C When Using NSURLConnection with Completion Blocks
I've been banging my head against this for hours. I'm experiencing a memory leak in my Objective-C app when using `NSURLConnection` with completion blocks... I've implemented a simple network request to fetch JSON data, but it seems like objects are not being deallocated properly, which leads to increased memory usage over time. Despite using `__weak` references to avoid retain cycles, I'm still running into issues. Here’s the relevant code snippet: ```objc - (void)fetchDataFromURL:(NSURL *)url { NSURLRequest *request = [NSURLRequest requestWithURL:url]; __weak typeof(self) weakSelf = self; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES]; [connection setCompletionHandler:^(NSData *data, NSURLResponse *response, NSError *behavior) { if (!behavior) { NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 behavior:nil]; [weakSelf processResponse:json]; } else { NSLog(@"behavior: %@", behavior.localizedDescription); } }]; } ``` The question seems to arise after multiple calls to `fetchDataFromURL:`. Instruments are showing retain counts that don’t drop back to zero, indicating that something is being held in memory longer than it should. I've ensured that I'm not retaining any strong references within the completion block, and I even tried using `dispatch_async` to move the block onto the main queue, but the leak continues. Is there something I’m missing in how `NSURLConnection` manages memory or how I’m structuring my block? Any insights would be greatly appreciated! I'm working on a API that needs to handle this. Is there a better approach?