axiom▌

Time cost: 15-20 minutes (if MPNowPlayingInfoCenter already working)

These patterns use NWConnection with completion handlers for apps supporting iOS 12-25. If your app targets iOS 26+, use NetworkConnection with async/await instead (see axiom-network-framework-ref skill).

Synchronously access actor-isolated state when you know you're already on the correct isolation domain.

Guide to Xcode 26's Recording UI Automation feature for creating UI tests through user interaction recording.

Time cost: 5-10 minutes

System photo picker for UIKit apps. No permission required.

AXe is a CLI tool for interacting with iOS Simulators using Apple's Accessibility APIs and HID functionality. Single binary, no daemon required.

Network.framework is Apple's modern networking API that replaces Berkeley sockets, providing smart connection establishment, user-space networking, built-in TLS support, and seamless mobility. Introduced in iOS 12 (2018) with NWConnection and evolved in iOS 26 (2025) with NetworkConnection for structured concurrency.

Block retain cycles are the #1 cause of Objective-C memory leaks. When a block captures self and is stored on that same object (directly or indirectly through an operation/request), you create a circular reference: self → block → self. Core principle 90% of block memory leaks stem from missing or incorrectly applied weak-strong patterns, not genuine Apple framework bugs.

Use when: