What is class-dump?
This is a command-line utility for examining the Objective-C runtime information stored in 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, so it is much more compact and readable.
Why use class-dump?
It’s a great tool for the curious. You can look at the design of closed source applications, frameworks, and bundles. Watch the interfaces evolve between releases. Experiment with private frameworks, or see what private goodies are hiding in the AppKit. Learn about the plugin API lurking in Mail.app.
Download address
How install class-dump?
- 下载 class-dump-3.5.dmg
- 打开 class-dump-3.5.dmg
- 将 class-dump 复制到 /usr/bin 目录下，如没有权限，关闭 SIP
- 在终端输入 class-dump 测试是否安装成功
How use class-dump?
- 新建 Xcode 项目
- 在真机上 Command + b 构建
- 右键 Produces 目录下的 .app 文件，Show In Finder 切换到该目录下
- 终端输入：class-dump -H AppName.app -o 要输出的目录
Matters need attention
对于 .ipa 文件，将后缀改为 .zip，然后解压，可以得到 .app。从 App store 下载的应用，经过加密，需要先砸壳，然后再使用 class-dump