otool(object file displaying tool) : 针对目标文件的展示工具。xcode自带工具。
在终端输入otool,可以看见otool常见命令。

    -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/Xcode9.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/otool

这里使用otool -L可以查看App所使用的动态库。
后面是.app文件夹里面当前App的Mach-O 二进制文件路径。
比如查看qmlw.app里面使用动态库。输入otool -L ./qmlw.app/qmlw,即可查看App需要链接所有的动态库。

依赖的动态库

这里就是做个简单功能记录。
如需了解更多otool,
可参考Mac - otool