ios逆向之路之一
class-dump下载地址：http://stevenygard.com/projects/class-dump/
升级了OSX 10.11在配置class-dump的时候，会发现书上推荐的class-dump存放目录/usr/bin,class-dump存放不进去，并且bin该文件夹的相关的权限也修改不了。
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参考网址：http://blog.csdn.net/majiakun1/article/details/52064435
根据上面网址所说整理一下：
跟着下面的步骤走
1、打开Terminal，输入mkdir ~/bin，在当前用户根目录下创建一个bin目录；
2、把class-dump给拷贝到这个目录里，并赋予其可执行权限：
sudo chmod 777 /usr/local/bin/class-dump
再执行
mv class-dump ~/bin; chmod +x ~/bin/class-dump;
3、打开~/.bash_profile文件：vi ~/.bash_profile，在文件最上方加一行：
export PATH=$HOME/bin/:$PATH，
然后保存并退出（在英文输入法中依次按下esc和:（shift + ;，即冒号），然后输入wq，回车即可）;
4、在Terminal中执行source ~/.bash_profile;
5、上面的操作把~/bin路径给加入了环境变量，我们测试一下好不好用；
测试的结果：
localhost:bin zy$ class-dump
class-dump 3.5 (64 bit)
Usage: class-dump [options]
where options are:
-a show instance variable offsets
-A show implementation addresses
--arch choose a specific architecture from a universal binary (ppc, ppc64, i386, x86_64, armv6, armv7, armv7s, arm64)
-C only display classes matching regular expression
-f 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 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.sdk
--sdk-mac specify Mac OS X version (will look in /Developer/SDKs/MacOSX.sdk
--sdk-root specify the full SDK root path (or use --sdk-ios/--sdk-mac for a shortcut)
