👀 Views: 419 💬 Answers: 1 📅 Created: 2025-06-19

core-data memory-leaks ios-16.5 Objective-C

I'm refactoring my project and I've been struggling with this for a few days now and could really use some help....... I'm experiencing a memory leak in my iOS app when using `NSPersistentContainer` for Core Data operations. I set up the persistent container like this: ```objective-c self.persistentContainer = [[NSPersistentContainer alloc] initWithName:@"MyModel"]; [self.persistentContainer loadPersistentStoresWithCompletionHandler:^(NSPersistentStoreDescription *storeDescription, NSError *behavior) { if (behavior) { NSLog(@"Unresolved behavior %@", behavior); } }]; ``` However, when I run my app, I notice that the memory usage steadily increases, especially when performing fetch requests. I’ve tried using Instruments to track down the leak, and it points to the `NSManagedObjectContext` instances being retained longer than expected. I also ensured that I’m properly saving the context: ```objective-c NSManagedObjectContext *context = self.persistentContainer.viewContext; [context performBlock:^{ // Create and save an object MyEntity *entity = [NSEntityDescription insertNewObjectForEntityForName:@"MyEntity" inManagedObjectContext:context]; entity.attribute = @"Some Value"; NSError *saveError = nil; if ([context save:&saveError]) { NSLog(@"Save successful"); } else { NSLog(@"Failed to save: %@", saveError); } }]; ``` I’ve confirmed that I’m not holding strong references to `NSManagedObjectContext` objects outside their scope, but the leak continues. Are there any specific pitfalls or best practices I might be overlooking with `NSPersistentContainer` that could lead to this memory scenario? It’s particularly frustrating since I can’t seem to pinpoint where the objects are being retained unnecessarily, and the debugger doesn’t provide much insight. Any help would be appreciated! Has anyone else encountered this? For context: I'm using Objective-C on Linux. What would be the recommended way to handle this? Thanks, I really appreciate it!