ios - 链接器失败，错误代码为 1

Question

我一直收到错误 Linker command failed with exit code 1 这似乎是因为我的 .h-file。在我的 stringsDE.h 中，我定义了常量字符串。这可能是问题所在吗？

duplicate symbol _QUESTIONCATBUTTONMIXED in: /Users/philip_air/Library/Developer/Xcode/DerivedData/juraQuiz-awgytksreajdjbdmoctjoffmzmmk/Build/Intermediates/juraQuiz.build/Debug-iphoneos/juraQuiz.build/Objects-normal/armv7/appLaunch.o /Users/philip_air/Library/Developer/Xcode/DerivedData/juraQuiz-awgytksreajdjbdmoctjoffmzmmk/Build/Intermediates/juraQuiz.build/Debug-iphoneos/juraQuiz.build/Objects-normal/armv7/quizVC.o ld: 17 duplicate symbols for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)

代码:

http://pastebin.com/iGTVAb6K

Answer 1

使用以下方法在 .h 文件中声明所有字符串:

// QUESTIONCAT BUTTONS
extern NSString const *QUESTIONCATBUTTON1;
extern NSString const *QUESTIONCATBUTTON2;
extern NSString const *QUESTIONCATBUTTON3;
extern NSString const *QUESTIONCATBUTTONMIXED;

然后像这样在一个单独的 .m 文件中真正定义它们:

// QUESTIONCAT BUTTONS
NSString * const QUESTIONCATBUTTON1 = @"Zivilrecht";
NSString * const QUESTIONCATBUTTON2 = @"öffentliches Recht";
NSString * const QUESTIONCATBUTTON3 = @"Strafrecht";
NSString * const QUESTIONCATBUTTONMIXED = @"Gemischt";