ios Apple Mach-O 链接器 (id) 错误
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Apple Mach-O Linker (id) Error
提问by Joshua Son
I have an error below:
我有以下错误：
ld /Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Products/Debug-iphonesimulator/uniText.app/uniText normal i386
cd "/Volumes/Data/Documents/XCode Projects/Trans SMS"
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk -L/Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Products/Debug-iphonesimulator -F/Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Products/Debug-iphonesimulator -filelist /Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Intermediates/uniText.build/Debug-iphonesimulator/uniText.build/Objects-normal/i386/uniText.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -framework SystemConfiguration -framework MessageUI -framework AddressBook -framework AddressBookUI -framework CoreTelephony -lsqlite3.0 -framework UIKit -framework Foundation -framework CoreGraphics -o /Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Products/Debug-iphonesimulator/uniText.app/uniText
ld: duplicate symbol _OBJC_IVAR_$_FMDatabase.databasePath in /Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Intermediates/uniText.build/Debug-iphonesimulator/uniText.build/Objects-normal/i386/FMDatabase-566DC6D59187887D.o and /Volumes/Data/Library/Developer/Xcode/DerivedData/uniText-cgynaitlevdrajfeoaldwldehaft/Build/Intermediates/uniText.build/Debug-iphonesimulator/uniText.build/Objects-normal/i386/FMDatabase-566DC6D59187887D.o for architecture i386
collect2: ld returned 1 exit status
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 failed with exit code 1
Could someone help me out? It used to work properly before. I have no idea what I have changed in the project sources. But I am sure that I never changed anything in that FMDatabase.h and .m.
有人可以帮我吗？它以前可以正常工作。我不知道我在项目来源中做了什么改变。但我确信我从未更改过 FMDatabase.h 和 .m 中的任何内容。
采纳答案by lemnar
The relevant portion of your error is ld: duplicate symbol _OBJC_IVAR_$_FMDatabase.databasePath. For some reason, the linker (ld) is trying to link FMDatabasetwice. Check to see if you have multiple copies of it in your project.
您的错误的相关部分是ld: duplicate symbol _OBJC_IVAR_$_FMDatabase.databasePath. 出于某种原因，链接器 ( ld) 试图链接FMDatabase两次。检查您的项目中是否有它的多个副本。
回答by toujamaru
I once got this error when I was initializing values to constants defined in the global scope in my .h file.
当我将值初始化为 .h 文件中全局作用域中定义的常量时，我曾经遇到过这个错误。
Solved the problem, by declaring them in the header, and initializing them in the .m file.
通过在标头中声明它们并在 .m 文件中初始化它们来解决问题。
回答by dakami
This is a quite old post, but maybe it still helps somebody.
这是一个很老的帖子，但也许它仍然对某人有帮助。
Just had the same problem, for me the solution was: I accidently linked an .m file in one of the headers instead of the .h file. Just changed that to properly link the .h file.
刚刚遇到了同样的问题，对我来说，解决方案是：我不小心在其中一个标题中链接了一个 .m 文件，而不是 .h 文件。只是将其更改为正确链接 .h 文件。
回答by Yanis
Check if you import framework which required.
检查您是否导入了需要的框架。
回答by Jerome
I solve the problem by updating my framework.
我通过更新我的框架解决了这个问题。
回答by George Filippakos
I solved by performing a Clean .
我通过执行 Clean 解决了。
Then could Build.
然后可以构建。
