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Jul 7, 2021 · Mobile Development

Analyzing Mach-O Files with Otool to Identify Unused Classes and Methods in iOS Apps

This article explains how to use the otool command to parse Mach-O sections, extract __objc_classlist and __objc_classrefs, compute their differences, and locate unused Objective‑C classes and methods for iOS app size optimization, providing sample Objective‑C code and detailed implementation steps.