我只是将PJSIP的库和框架添加到我的XCODE项目中，例如模拟器，设备和第三方，但是当我构建我的项目时，它显示错误：
Undefined symbols for architecture armv7:
"_pjmedia_get_video_format_info", referenced from:
_ios_factory_create_stream in libpjmedia-videodev-arm-apple-darwin9.a(ios_dev.o)
"_pjmedia_format_get_video_format_detail", referenced from:
_ios_factory_create_stream in libpjmedia-videodev-arm-apple-darwin9.a(ios_dev.o)
"_pjmedia_format_init_video", referenced from:
_ios_factory_init in libpjmedia-videodev-arm-apple-darwin9.a(ios_dev.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我尝试谷歌解决方案，但似乎没有帮助。请分享您的想法，我想我会错过一些配置或库。提前谢谢。