xcode提供有这样一个perl脚本工具,可以打包一个app为ipa文件，为上传app store做准备. 路径是

`xcode-select -print-path`/Platforms/iPhoneOS.platform/Developer/usr/bin/PackageApplication

添加-help参数查看PackageApplication用法帮助，或者添加-man参数查看完整的帮助信息。

`xcode-select -print-path`/Platforms/iPhoneOS.platform/Developer/usr/bin/PackageApplication -help
Usage:
    PackageApplication [-s signature] application [-o output_directory]
    [-verbose] [-plugin plugin] || -man || -help

    Options:

        -s   certificate name to resign application before packaging
        -o              specify output filename
        -plugin         specify an optional plugin
        -help           brief help message
        -man            full documentation
        -v[erbose]      provide details during operation

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