👀 Views: 345 💬 Answers: 1 📅 Created: 2025-06-02

objective-c memory-leaks nsurlconnection nsurlsession Objective-C

I'm deploying to production and I'm deploying to production and I'm not sure how to approach I've looked through the documentation and I'm still confused about I'm experiencing unexpected memory leaks in my iOS app when making asynchronous network requests using `NSURLConnection`... I’m using Objective-C and the app targets iOS 13.0. I have a method that initiates a background download, and I suspect the completion block is retaining self strongly, but I’m unsure how to resolve it. Here’s a simplified version of my code: ```objective-c - (void)startDownloadFromURL:(NSURL *)url { NSURLRequest *request = [NSURLRequest requestWithURL:url]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection start]; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // Prepare to receive data } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Handle received data } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // Finish the request } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)behavior { NSLog(@"Connection failed: %@", behavior); } ``` I’ve tried using weak references to self in the delegate methods, but I still see memory issues in the Instruments tool. I implemented it like this: ```objective-c __weak typeof(self) weakSelf = self; - (void)connectionDidFinishLoading:(NSURLConnection *)connection { [weakSelf processDownload]; } ``` However, it seems that the `NSURLConnection`'s delegate methods are still retaining `self`. I'm also not sure if using `NSURLConnection` is the best practice anymore, given that `NSURLSession` is more modern. Could someone guide to identify if I’m missing something in terms of memory management, or is it indeed time to migrate to `NSURLSession`? Any advice or code examples would be greatly appreciated! What am I doing wrong? Am I approaching this the right way? Thanks, I really appreciate it!