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Learn how ARC works, spot common retain‑cycle pitfalls, and break them with weak references. A practical delegate example, block handling, and a checklist keep your Objective‑C code leak‑free.
A practical guide to Objective‑C ARC weak references: how they prevent retain cycles, a worked delegate/block example, common pitfalls, and verification steps using Xcode breakpoints and Instruments.
Learn how to use Objective-C Categories to extend classes and system frameworks without subclassing, including a practical example and critical memory limits.
View controllers that never deallocate after dismissal usually mean a retain cycle with a block. This guide maps symptoms to causes and gives ordered checks and fixes for ARC in Objective-C.
Learn how to attach arbitrary data to existing Objective‑C instances without subclassing or source changes. This guide walks through the desired outcome, prerequisites, step‑by‑step use of objc_setAssociatedObject, safety checks, and cleanup options.
Objective-C categories let you add methods to classes you don't own — no subclassing required. Here's how to use them safely, including prefixes, the no-ivars limit, and associated objects.
Learn how to use __weak delegates and the weak-strong block pattern to eliminate retain cycles in Objective-C ARC while keeping APIs explicit about object lifetime.
Adopt Objective‑C nullability annotations in a mixed Swift/Obj‑C project to improve Swift interop, catch nil bugs at compile time, and preserve runtime behaviour. Follow this step‑by‑step guide to wrap headers, annotate pointers, and verify changes.
Learn how to enable ARC per file in an Objective‑C project, verify the setup with build logs and Instruments, and understand the limits when bridging Core Foundation objects.