链接器错误Unrar4iOS框架

Question

我已经添加了Unrar4iOS框架并获得了低于链接器错误。 如何解决这个问题？

duplicate symbol __Z12CallbackProcjlll in: 
    /Users/dmitryvlasenko/Library/Developer/Xcode/DerivedData/UnrealReader-cpvucqqjfnkeppcasgjdrwasaryu/Build/Intermediates/UnrealReader.build/Debug-iphonesimulator/UnrealReader.build/Objects-normal/i386/Unrar4iOS.o 
    /Users/dmitryvlasenko/Desktop/UnrealReader/Unrar4iOS.framework/Unrar4iOS(Unrar4iOS.o) 
duplicate symbol _OBJC_IVAR_$_Unrar4iOS.header in: 
    /Users/dmitryvlasenko/Desktop/UnrealReader/Unrar4iOS.framework/Unrar4iOS(Unrar4iOS.o) 
duplicate symbol _OBJC_IVAR_$_Unrar4iOS._rarFile in: 
    /Users/dmitryvlasenko/Library/Developer/Xcode/DerivedData/UnrealReader-cpvucqqjfnkeppcasgjdrwasaryu/Build/Intermediates/UnrealReader.build/Debug-iphonesimulator/UnrealReader.build/Objects-normal/i386/Unrar4iOS.o 
    /Users/dmitryvlasenko/Desktop/UnrealReader/Unrar4iOS.framework/Unrar4iOS(Unrar4iOS.o) 
duplicate symbol _OBJC_IVAR_$_Unrar4iOS.filename in: 
    /Users/dmitryvlasenko/Desktop/UnrealReader/Unrar4iOS.framework/Unrar4iOS(RARExtractException.o) 
duplicate symbol _OBJC_EHTYPE_$_RARExtractException in: 
    /Users/dmitryvlasenko/Library/Developer/Xcode/DerivedData/UnrealReader-cpvucqqjfnkeppcasgjdrwasaryu/Build/Intermediates/UnrealReader.build/Debug-iphonesimulator/UnrealReader.build/Objects-normal/i386/RARExtractException.o 
    /Users/dmitryvlasenko/Desktop/UnrealReader/Unrar4iOS.framework/Unrar4iOS(RARExtractException.o) 
ld: 12 duplicate symbols for architecture i386 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

Answer 1

该错误表明Unrar4iOS既在Unrar4iOS.a中定义，也作为项目中的单个文件定义。 因此，请前往：

TargetSettings-> Build Phases->与库链接二进制文件并删除Unrar4iOS。

Answer 2

看来你已经添加了相同的库两次这就是为什么它说：“重复的符号__Z12CallbackProcjlll”

Answer 3

的的unrar库是用C++编写。如果您的项目中没有任何.mm文件，那么Xcode不会链接到C++标准库，并且所有对C++的引用都无法链接。

Answer 4

这是一个编译的测试井框架： Unrar4iOS.framework