Mac OS X下二进制可执行文件的动态链接库是dylib文件，Linux下用ldd查看，苹果系统用otool即可，不过要安装xcode

otool –L xxxx.dylib

The "strings" tool can output a list of the methods that the library calls and "otool -ov" will output the Objective-C class structures and their defined methods. 

Mac OS X查看二进制可执行文件引用的动态链接库（otool –L xxxx.dylib）