class-dump is a command-line utility for examining the Objective-C segment of Mach-O files. It generates declarations for the classes, categories and protocols. This is the same information provided by using ‘otool -ov’, but presented as normal Objective-C declarations.
The latest version and information is available at:
The source code is also available from my Github repository at:
class-dump 3.5 (64 bit) Usage: class-dump [options] <mach-o-file> where options are: -a show instance variable offsets -A show implementation addresses --arch <arch> choose a specific architecture from a universal binary (ppc, ppc64, i386, x86_64) -C <regex> only display classes matching regular expression -f <str> find string in method name -H generate header files in current directory, or directory specified with -o -I sort classes, categories, and protocols by inheritance (overrides -s) -o <dir> output directory used for -H -r recursively expand frameworks and fixed VM shared libraries -s sort classes and categories by name -S sort methods by name -t suppress header in output, for testing --list-arches list the arches in the file, then exit --sdk-ios specify iOS SDK version (will look in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS<version>.sdk --sdk-mac specify Mac OS X version (will look in /Developer/SDKs/MacOSX<version>.sdk --sdk-root specify the full SDK root path (or use --sdk-ios/--sdk-mac for a shortcut)
class-dump UIKit and all the frameworks it uses:
class-dump /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/System/Library/Frameworks/UIKit.framework -r –sdk-ios 4.3
class-dump UIKit (and all the frameworks it uses) from developer tools that have been installed in /Dev42 instead of /Developer:
class-dump /Dev42/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/System/Library/Frameworks/UIKit.framework -r –sdk-root /Dev42/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk
This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files. Copyright © 1997-1998, 2000-2001, 2004-2013 Steve Nygard.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
You may contact the author by: e-mail: nygard at gmail.com