Objective c iPhone复制符号错误

我有一个iPhone应用程序，我想在其中包括

MobFox

广告，在我添加了他们的框架后，我得到了以下错误：

duplicate symbol _OBJC_CLASS_$_CDataScanner in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_CLASS_$_CJSONDeserializer in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONDeserializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_CLASS_$_CJSONScanner in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_CLASS_$_CJSONSerializer in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONSerializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CDataScanner.current in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CDataScanner.data in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CDataScanner.end in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CDataScanner.length in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CDataScanner.start in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CJSONDeserializer.scanner in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONDeserializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CJSONScanner.nullObject in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_IVAR_$_CJSONScanner.strictEscapeCodes in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_METACLASS_$_CDataScanner in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CDataScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_METACLASS_$_CJSONDeserializer in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONDeserializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_METACLASS_$_CJSONScanner in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _OBJC_METACLASS_$_CJSONSerializer in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONSerializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _kJSONDeserializerErrorDomain in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONDeserializer.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)
duplicate symbol _kJSONScannerErrorDomain in:
    /Users/user/Library/Developer/Xcode/DerivedData/myapp-evegwvxyndhicigkgkdhjdmnybwq/Build/Intermediates/myapp.build/Debug-iphoneos/myapp.build/Objects-normal/armv7/CJSONScanner.o
    /Users/user/Desktop/myapp/MobFox.framework/MobFox(MobFox)

知道为什么会这样吗？我想这是因为我的应用程序和mobfox都使用这个json框架。

---

可以禁用它们的代码吗？

看起来您正在从

MobFox

编译对象，并链接到

MobFox

框架（或链接静态库和链接到

MobFox

框架）。似乎外部库和您的项目使用相同的json序列化类，这就是编译器编译它两次的原因。可以在外部库中禁用编译它吗？MTA找到答案了吗？@venky

MobFox

正在使用

CJSONDeserializer

。我在项目中做的是删除

CJSONDeserializer

并用本机JSON解析器替换它