steipete/Aspects

Health v2 · maintenance only

Flags: archived

Adoption not part of the score

8422 stars · 1266 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Aspects is a small Objective-C/Swift library for aspect-oriented programming that hooks into existing methods per class or per instance using message forwarding and dynamic subclasses. It is essentially method swizzling made easy, with before/instead/after insertion points and thread-safe token-based deregistration.

Use cases

• add logging or analytics to existing iOS methods without subclassing
• mock parts of a method in tests
• hook into view controller lifecycle methods
• patch third-party framework behavior at runtime
• quickly prototype behavior changes via method hooks

When to choose

• you need lightweight AOP or method swizzling in Objective-C/Swift
• you want per-instance or per-class method hooks with before/instead/after options
• you need partial test mocks in an iOS codebase
• you're hacking on a prototype and need quick runtime hooks

When to avoid

• the author explicitly does not recommend it for production code
• you need to hook methods called at high frequency (message forwarding overhead)
• you need to hook static methods
• your codebase relies heavily on message forwarding, which conflicts with _objc_msgForward

Facets

library · maturity maintenance

middleware developer-tools testing mocking developer-tools mobile-development apple-ecosystem cpp aspect-oriented-programming method-swizzling objective-c aop hooks runtime ios macos swift

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