otool 命令_otool瘦身_linux命令与shell命令

iOS应用所依赖的系统库检查

otool(object file displaying tool) : 针对目标文件的展示工具，用来发现应用中使用到了哪些系统库，调用了其中哪些方法，使用了库中哪些对象及属性，它是Xcode自带的常用工具。otool 命令下面是一些常用的命令：

-f print the fat headers
-a print the archive header
-h print the mach header
-l print the load commands
-L print shared libraries used
-D print shared library id name
-t print the text section (disassemble with -v)
-p <routine name>  start dissassemble from routine name
-s <segname> <sectname> print contents of section
-d print the data section
-o print the Objective-C segment
-r print the relocation entries
-S print the table of contents of a library
-T print the table of contents of a dynamic shared library
-M print the module table of a dynamic shared library
-R print the reference table of a dynamic shared library
-I print the indirect symbol table
-H print the two-level hints table
-G print the data in code table
-v print verbosely (symbolically) when possible
-V print disassembled operands symbolically
-c print argument strings of a core file
-X print no leading addresses or headers
-m don't use archive(member) syntax
-B force Thumb disassembly (ARM objects only)
-q use llvm's disassembler (the default)
-Q use otool(1)'s disassembler
-mcpu=arg use `arg' as the cpu for disassembly
-j print opcode bytes
-P print the info plist section as strings
-C print linker optimization hints
--version print the version of /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/otool

1、依赖的库查询：

在iOS开发中，通常我们Xcode工程的一个最终的Product是app格式，而如果你在Finder中点击“显示包内容”看看app里都有什么，你会看到里面的好多东西，有nib、plist、mobileprovision和各种图片资源等，而其中最重要的一个文件就是被标为“Unix可执行文件”(用file查看是Mach-O executable arm)类型的文件。我们的代码逻辑都在这里面。otool 命令

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