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Further Reading
Apple Documentation
The following document is available in the iOS Developer Library at developer.apple.com or through the Xcode Documentation and API Reference.
Objective-C Runtime Programming Guide
Other Resources
Ash, Mike. NSBlog. A very insightful blog covering all kinds of low-level topics. www.mikeash.com/pyblog
■ Friday Q&A 2009-03-20: Objective-C Messaging
■ Friday Q&A 2010-01-29: Method Replacement for Fun and Profit – The method-swizzling approach in this chapter is a refinement of Mike Ash’s approach.
bbum. weblog-o-mat. bbum is a prolific contributor to Stackoverflow, and his blog has some of my favorite low-level articles, particularly his four-part opcode-by-opcode analysis of objc_msgSend. friday.com/bbum