我正在使用GTL框架来使用谷歌GDrive。在将该框架导入我的应用程序多次失败后，我将GTL.xcodeproject中的所有文件复制到我的应用程序中。但我仍然得到下面提到的错误。我搜索了所有但没有找到重复的文件或任何东西。请在这里帮忙。
/Users/ashutoshb/Desktop/Screen Shot 2012-11-30 at 10.30.24 AM.png
Ld /Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Products/Debug-iphonesimulator/MowWom.app/MowWom normal i386
cd /Users/ashutoshb/Mowwom/MowWomCode/Updated/MowWom
setenv IPHONEOS_DEPLOYMENT_TARGET 4.3
setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk -L/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Products/Debug-iphonesimulator "-L/Users/ashutoshb/Mowwom/MowWomCode/Updated/MowWom/MowWom/Twitter+OAuth/Libraries & Headers" -L/Users/ashutoshb/Mowwom/MowWomCode/Updated/MowWom - F/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom- dmhxeapzkbnuniegdxmsvdgmodrw/Build/Products/Debug-iphonesimulator - F/Applications/Xcode.app/Contents/Developer/Library/Frameworks - F/Users/ashutoshb/Mowwom/MowWomCode/Updated/MowWom -filelist /Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom- dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug- iphonesimulator/MowWom.build/Objects-normal/i386/MowWom.LinkFileList -Xlinker - objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=4.3 -framework SenTestingKit -framework Security -framework MessageUI -lxml2 -lz -framework CFNetwork -framework MobileCoreServices -framework SystemConfiguration -framework CoreLocation -framework MapKit -framework QuartzCore -framework UIKit -framework Foundation -framework CoreGraphics -lOAuth -o /Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Products/Debug-iphonesimulator/MowWom.app/MowWom
duplicate symbol _OBJC_CLASS_$_GTLDriveAboutAdditionalRoleInfoItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_METACLASS_$_GTLDriveAboutAdditionalRoleInfoItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_CLASS_$_GTLDriveAboutExportFormatsItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_METACLASS_$_GTLDriveAboutExportFormatsItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_CLASS_$_GTLDriveAboutFeaturesItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_METACLASS_$_GTLDriveAboutFeaturesItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_CLASS_$_GTLDriveAboutImportFormatsItem in:
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDrive_Sources.o
/Users/ashutoshb/Library/Developer/Xcode/DerivedData/MowWom-dmhxeapzkbnuniegdxmsvdgmodrw/Build/Intermediates/MowWom.build/Debug-iphonesimulator/MowWom.build/Objects-normal/i386/GTLDriveAbout.o
duplicate symbol _OBJC_METACLASS_$_GTLDriveAboutImportFormatsItem in:
答案 0 :(得分：30)
请务必检查“构建阶段”部分中的“编译源代码”。有时他们会在那里加倍（但在项目文件浏览器中只出现一次）
答案 1 :(得分：1)
尝试从项目位置删除所有文件/文件夹，并从XCode项目中删除引用。
然后，将库文件夹复制到项目位置，在XCode中，单击“添加文件...”，然后在项目位置选择新添加的文件夹。