ByteDance Terminal Technology

May 28, 2021 · Mobile Development

Hooking iOS Delegates with Method Swizzling and Proxy Patterns: Challenges, Crash Analysis, and Compatibility Solutions

This article explores using AOP techniques such as Method Swizzle and NSProxy‑based delegate proxies to instrument iOS view controllers and collection view delegates, analyzes crashes caused by multiple setDelegate hooks—including interactions with RxCocoa—and proposes several practical solutions to ensure stable hooking in complex app environments.