Xcode下体系结构x86_64的重复符号

Question

我现在有与上述标题相同的问题，但尚未找到正确的答案。我得到了错误：    /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)任何帮助表示赞赏。最后，  我找出了导致我添加-ObjC到中的错误的原因Other Linker Flags。删除此值后，我可以成功构建项目，但是我不知道为什么。谁能解释一下？

Answer 1

对我而言，将“否通用块”从“是”更改为“否”（在“目标”->“构建设置”->“ Apple LLVM-代码生成”下）解决了该问题。

Answer 2

就我而言，我只是创建了一个头文件来定义常量字符串，如下所示：

NSString *const AppDescriptionString = @"Healthy is the best way to keep fit";

我通过使用static以下方法解决了这种情况：

static NSString *const AppDescriptionString = @"Healthy is the best way to keep fit";