使用 protobuf 的 i386 架构的未定义符号

Question

我正在尝试制作一个使用协议缓冲区的应用程序。我收到此错误，知道为什么吗？

Ld /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest normal i386
cd /Users/fmota/Documents/Developer/Protobuf/PBTest
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator -F/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator -filelist /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Intermediates/PBTest.build/Debug-iphonesimulator/PBTest.build/Objects-normal/i386/PBTest.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=50000 -framework SystemConfiguration -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest

Undefined symbols for architecture i386:
   "_OBJC_CLASS_$_AreaRequest_Builder", referenced from:
       objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

是的，这是我见过的一个常见问题。

查看这个几乎重复的问题的答案，并让我知道它是否解决了问题为你。 :-)

Answer 2

将 *.pb.h 和 *.pb.m 添加到“TARGET”->“Build Phases”->“Compile Sources”！

Answer 3

我的工作环境是 xcode 5.0.2。

将*.pb.m添加到“TARGET”->“Build Phases”->“Compile Sources”

不要添加*.pb.h，我添加*.pb.h后，它无法链接。