¿Por qué AVFoundation no se vinculará con mi proyecto XCode 3.2.3 iPhone 4.0.1?

Question

Estoy siguiendo la referencia en http://developer.apple.com/iphone/library/qa/qa2010/qa1702.html para capturar video desde la cámara del iPhone. Es un proyecto nuevo además del código de esa página. También agregué el marco AVFoundation al proyecto. Aquí está el errores de enlace me sale:

Build my project of project my project with configuration Debug 

CompileC "build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv6/MainViewController.o" /Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m normal armv6 objective-c com.apple.compilers.gcc.4_2 
cd /Users/mwilliamson/Projects/my_project/iphone 
setenv LANG en_US.US-ASCII 
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/opt/local/bin:/usr/local/git/bin" 
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -x objective-c -arch armv6 -fmessage-length=0 -pipe -std=c99 -Wno-trigraphs -fpascal-strings -O0 -Wreturn-type -Wunused-variable -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk -fvisibility=hidden -gdwarf-2 -mthumb -miphoneos-version-min=4.0 -iquote "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-generated-files.hmap" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-own-target-headers.hmap" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-all-target-headers.hmap" -iquote "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-project-headers.hmap" -F/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -I/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos/include -I/Users/mwilliamson/Projects/my_project/iphone/opencv_device/include "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/DerivedSources/armv6" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/DerivedSources" -include /var/folders/kW/kW6u6B7SGyGYu+nNumtIa++++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/my_project_Prefix-alujyqxskcuyuogdsynmjyrkxbhh/my_project_Prefix.pch -c /Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m -o "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv6/MainViewController.o" 

/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m: In function '-[MainViewController captureOutput:didOutputSampleBuffer:fromConnection:]': 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: 'MainViewController' may not respond to '-imageFromSampleBuffer:' 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: (Messages without a matching method signature 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: will be assumed to return 'id' and accept 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: '...' as arguments.) 

Ld "build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv6/my project" normal armv6 
cd /Users/mwilliamson/Projects/my_project/iphone 
setenv IPHONEOS_DEPLOYMENT_TARGET 4.0 
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/opt/local/bin:/usr/local/git/bin" 
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk -L/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -F/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -filelist "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv6/my project.LinkFileList" -dead_strip -lz -lstdc++ /Users/mwilliamson/Projects/my_project/iphone/opencv_device/lib/libcxcore.a /Users/mwilliamson/Projects/my_project/iphone/opencv_device/lib/libcv.a -miphoneos-version-min=4.0 -framework Foundation -framework UIKit -framework CoreGraphics -framework AVFoundation -o "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv6/my project" 

Undefined symbols: 
    "_CVPixelBufferGetBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferUnlockBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferLockBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CMSampleBufferGetImageBuffer", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferGetHeight", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_kCVPixelBufferPixelFormatTypeKey", referenced from: 
     _kCVPixelBufferPixelFormatTypeKey$non_lazy_ptr in MainViewController.o 
    (maybe you meant: _kCVPixelBufferPixelFormatTypeKey$non_lazy_ptr) 
    "_CVPixelBufferGetWidth", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferGetBytesPerRow", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CMTimeMake", referenced from: 
     -[MainViewController setupCaptureSession] in MainViewController.o 
    "_CVPixelBufferGetDataSize", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status 

CompileC "build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv7/MainViewController.o" /Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m normal armv7 objective-c com.apple.compilers.gcc.4_2 
cd /Users/mwilliamson/Projects/my_project/iphone 
setenv LANG en_US.US-ASCII 
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/opt/local/bin:/usr/local/git/bin" 
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -x objective-c -arch armv7 -fmessage-length=0 -pipe -std=c99 -Wno-trigraphs -fpascal-strings -O0 -Wreturn-type -Wunused-variable -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk -fvisibility=hidden -gdwarf-2 -mthumb -miphoneos-version-min=4.0 -iquote "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-generated-files.hmap" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-own-target-headers.hmap" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-all-target-headers.hmap" -iquote "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/my project-project-headers.hmap" -F/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -I/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos/include -I/Users/mwilliamson/Projects/my_project/iphone/opencv_device/include "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/DerivedSources/armv7" "-I/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/DerivedSources" -include /var/folders/kW/kW6u6B7SGyGYu+nNumtIa++++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/my_project_Prefix-gtrotaxhqdjhgqbqbsnyeqjkaxdt/my_project_Prefix.pch -c /Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m -o "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv7/MainViewController.o" 

/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m: In function '-[MainViewController captureOutput:didOutputSampleBuffer:fromConnection:]': 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: 'MainViewController' may not respond to '-imageFromSampleBuffer:' 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: (Messages without a matching method signature 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: will be assumed to return 'id' and accept 
/Users/mwilliamson/Projects/my_project/iphone/Classes/MainViewController.m:126: warning: '...' as arguments.) 

Ld "build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv7/my project" normal armv7 
cd /Users/mwilliamson/Projects/my_project/iphone 
setenv IPHONEOS_DEPLOYMENT_TARGET 4.0 
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/opt/local/bin:/usr/local/git/bin" 
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk -L/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -F/Users/mwilliamson/Projects/my_project/iphone/build/Debug-iphoneos -filelist "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv7/my project.LinkFileList" -dead_strip -lz -lstdc++ /Users/mwilliamson/Projects/my_project/iphone/opencv_device/lib/libcxcore.a /Users/mwilliamson/Projects/my_project/iphone/opencv_device/lib/libcv.a -miphoneos-version-min=4.0 -framework Foundation -framework UIKit -framework CoreGraphics -framework AVFoundation -o "/Users/mwilliamson/Projects/my_project/iphone/build/my project.build/Debug-iphoneos/my project.build/Objects-normal/armv7/my project" 

Undefined symbols: 
    "_CVPixelBufferGetBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferUnlockBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferLockBaseAddress", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CMSampleBufferGetImageBuffer", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferGetHeight", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_kCVPixelBufferPixelFormatTypeKey", referenced from: 
     _kCVPixelBufferPixelFormatTypeKey$non_lazy_ptr in MainViewController.o 
    (maybe you meant: _kCVPixelBufferPixelFormatTypeKey$non_lazy_ptr) 
    "_CVPixelBufferGetWidth", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CVPixelBufferGetBytesPerRow", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
    "_CMTimeMake", referenced from: 
     -[MainViewController setupCaptureSession] in MainViewController.o 
    "_CVPixelBufferGetDataSize", referenced from: 
     -[MainViewController imageFromSampleBuffer:] in MainViewController.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status 

Answer 1

Una vez más, mi respuesta a mi propia pregunta .... Yo tenía que añadir los marcos CoreVideo y CoreMedia también.

Answer 2

Pasé un par de horas luchando con esto una variación de este problema. Estoy publicando esto para ayudar a cualquier otra persona que pueda estar en la misma situación. Ya había vinculado CoreVideo & CoreMedia a mi proyecto. Sin embargo, todavía estaba experimentando este problema. Después de buscar mucho y probar diferentes cosas, encontré esta publicación. Aquí está mi solución:

1) Elimine las bibliotecas problemáticas (CoreVideo y CoreMedia en mi caso). Para ello, elimínelos en el navegador de proyectos y seleccione "Eliminar referencias" y elimínelos de los marcos vinculados en "Fases de compilación"

2) Agregue los marcos nuevamente, límpielos y recompilelos.