👀 Views: 0 💬 Answers: 1 📅 Created: 2025-09-12

objective-c memory-management blocks best-practices

Quick question that's been bugging me - I'm building a feature where I've looked through the documentation and I'm still confused about I'm working on a project and hit a roadblock. Recently started working with a custom framework that heavily utilizes blocks for callbacks. As I dig deeper into the memory management aspects, I find myself confused about the retain cycles and how to manage them effectively in Objective-C. I understand that using `__weak` references can help, but I'm not entirely sure of the best practices to implement it correctly. For example, I've defined a block like this: ```objective-c typedef void (^CompletionBlock)(BOOL success); @interface MyCustomClass : NSObject @property (nonatomic, copy) CompletionBlock completionHandler; @end ``` When I set the completion handler in one of my methods: ```objective-c - (void)performTaskWithCompletion:(CompletionBlock)completion { self.completionHandler = completion; // Some asynchronous operation } ``` This works fine, but I'm worried about potential memory leaks if the class instance captures itself in the block. I've tried using `__weak` and `__strong` references, but it feels like I'm not fully grasping the lifecycle. Here's what I attempted: ```objective-c __weak typeof(self) weakSelf = self; self.completionHandler = ^(BOOL success) { if (weakSelf) { // Handle success } }; ``` However, I'm not convinced that this approach is foolproof, especially in more complex scenarios. I also read about using `__block`, but that seems to introduce its own challenges. What are the best practices when dealing with blocks and memory management in Objective-C, particularly in the context of custom frameworks? Any insights or code examples would be greatly appreciated. I’m using Xcode 14.0 and targeting iOS 16. For context: I'm using Objective-C on Ubuntu. This is part of a larger API I'm building. Is there a better approach? I'm developing on CentOS with Objective-C. Am I approaching this the right way? This is happening in both development and production on CentOS. Any ideas what could be causing this?