How does this skill help with Core Foundation objects?

It provides standardized patterns for toll-free bridging, helping you correctly use __bridge_transfer and __bridge_retained to pass ownership between ARC-managed objects and manually managed C pointers.

What is the 'weak-strong dance' in ARC?

It is a pattern used in blocks where a weak reference to 'self' is captured to prevent a retain cycle, and then converted to a local strong reference inside the block to ensure the object isn't deallocated while the block is executing.

Can this skill detect memory leaks?

While it doesn't run code, it provides the implementation patterns necessary to avoid common memory leaks, such as identifying where strong references between parents and children should be replaced with weak references.

When should I use the 'copy' attribute for properties?

The 'copy' attribute should be used for properties that accept objects with mutable subclasses, such as NSString or NSArray, to ensure your object keeps its own immutable snapshot of the data.

Objective-C ARC Patterns

Name: Objective-C ARC Patterns
Author: TheBushidoCollective

byTheBushidoCollective

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Mobile Development

Implements memory-safe Objective-C code using Automatic Reference Counting patterns, ownership qualifiers, and Core Foundation bridging.

This skill provides specialized guidance for mastering memory management in Objective-C through Automatic Reference Counting (ARC). It helps developers navigate complex ownership rules, resolve memory leaks caused by retain cycles, and implement advanced patterns like the 'weak-strong dance' for blocks. By automating the application of ownership qualifiers and providing clear patterns for toll-free bridging with Core Foundation, this skill ensures that iOS and macOS applications remain performant and free from common memory-related crashes like use-after-free or double-free errors.

Key Features

0139 GitHub stars

02Advanced patterns for memory-safe asynchronous code execution

03Safe handling of Core Foundation bridging using __bridge, __bridge_transfer, and __bridge_retained

04Automated detection and resolution of retain cycles in delegates and blocks

05Expert implementation of strong, weak, and unsafe_unretained reference patterns

06Best practices for property ownership qualifiers including copy for mutable types

Use Cases

01Developing high-performance, memory-efficient iOS and macOS applications

02Integrating low-level C-based frameworks with modern ARC-managed Objective-C code

03Refactoring legacy Objective-C codebases to resolve complex memory leaks

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han objc-arc-patterns

For use in Claude.ai and ChatGPT

Download Skill