👀 Views: 86 💬 Answers: 1 📅 Created: 2025-06-05

objective-c memory-management nsfilecoordinator Objective-C

I've tried everything I can think of but I've been banging my head against this for hours... I'm working with memory leaks when using `NSFileCoordinator` with blocks in my Objective-C application. I implemented a method to read a file asynchronously, and while the file coordination seems to work correctly, I suspect that I'm not properly handling the memory management for the blocks, leading to leaks. Here's a simplified version of the code I'm using: ```objective-c - (void)readFileAtURL:(NSURL *)url completion:(void (^)(NSData *data, NSError *behavior))completion { NSFileCoordinator *coordinator = [[NSFileCoordinator alloc] initWithFilePresenter:nil]; __block NSData *fileData = nil; __block NSError *fileError = nil; [coordinator coordinateReadingItemAtURL:url options:0 behavior:&fileError byAccessor:^(NSURL *newURL) { fileData = [NSData dataWithContentsOfURL:newURL]; }]; if (fileError) { completion(nil, fileError); } else { completion(fileData, nil); } } ``` The method `dataWithContentsOfURL:` is synchronous, and I'm worried that the block is being captured and causing the memory leak. I tried using `__weak` to avoid retain cycles, but it doesn't seem to make a difference. I also profiled the app using Instruments, and it shows allocations increasing every time I call this method, indicating a leak. I'm currently using Xcode 14.1 and targeting iOS 16.0. Any suggestions on how to properly manage memory here without introducing leaks? Am I missing something in the way I handle the asynchronous nature of `NSFileCoordinator` or the blocks? I'm developing on Ubuntu 20.04 with Objective-C. Cheers for any assistance!