ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Languages & runtimes · #objectivec
A concise decision guide for enabling ARC in Objective‑C projects, covering constraints, option trade‑offs, a sample implementation, and validation steps.
ARC eliminates manual retain/release calls, but choosing it requires understanding weak refs, migration steps, and potential pitfalls. This post walks through the decision, a practical migration example, and how to verify the result.
Learn how to resolve EXC_BAD_ACCESS crashes in Objective-C by using Zombie Objects to identify dangling pointers and fixing improper reference types.
Learn how enabling ARC per file simplifies Objective‑C memory management, reduces boilerplate, and what limits to watch for when mixing ARC with manual retain/release.
Learn how to build a thread‑safe singleton in Objective‑C with GCD’s dispatch_once, including verification steps and failure‑mode analysis.
ARC simplifies memory management in Objective-C, but it cannot prevent retain cycles. Learn how to use strong and weak references to break circular dependencies and prevent memory leaks.
Learn how to use Objective-C's dynamic runtime to modify class behavior at execution time using Method Swizzling, and how to avoid common pitfalls like infinite recursion.
When implementing least-privilege authentication for sensitive credentials in Objective-C, developers must choose between granular access control and device-state protection levels. The kSecAttrAccessControl attribute allows for specific biometric requirements, such as FaceID or TouchID, ensuring that the item is only released upon active user verification.
Integrating Objective-C dynamic dispatch with Swift requires a balance between the flexibility of objc_msgSend and Swift's static optimization. While the @objc attribute exposes Swift members to the runtime, using @objc dynamic forces the use of the Objective-C message-sending mechanism for method invocation. A design uncertainty arises when implementing run
xcode
swift