我現在有與上述標題相同的問題，但尚未找到正確的答案。我得到了錯誤：    /Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Intermediates/TestMoboSDK-Client.build/Debug-iphonesimulator/TestMoboSDK-Client.build/Objects-normal/x86_64/MoboSDK.o    /Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Products/Debug-iphonesimulator/libMoboSDK.a(MoboSDK.o)duplicate symbol _OBJC_METACLASS_$_MoboSDK in:    /Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Intermediates/TestMoboSDK-Client.build/Debug-iphonesimulator/TestMoboSDK-Client.build/Objects-normal/x86_64/MoboSDK.o    /Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Products/Debug-iphonesimulator/libMoboSDK.a(MoboSDK.o)ld: 75 duplicate symbols for architecture x86_64clang: error: linker command failed with exit code 1 (use -v to see invocation)任何幫助表示贊賞。最后，  我找出了導致我添加-ObjC到中的錯誤的原因Other Linker Flags。刪除此值后，我可以成功構建項目，但是我不知道為什么。誰能解釋一下？