ld：架构i386的8个重复符号

Question

我经历过已在论坛上提出的问题。获得如下错误

ld: 8 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

下面有更多错误说明

ld: warning: directory not found for option '-L/Users/Documents/Sprint1/iPhone/MyApplication/MyApplication/lib/lib'
ld: warning: directory not found for option '-Lrestkit'
ld: warning: ignoring file /Users/Documents/Sprint1/iPhone/MyApplication/MyApplication/lib/lib restkit/libRestKit.a, missing required architecture i386 in file /Users/Documents/Sprint1/iPhone/MyApplication/MyApplication/lib/lib restkit/libRestKit.a (2 slices)
duplicate symbol _OBJC_IVAR_$_Reachability.reachabilityRef in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _kReachabilityChangedNotification in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _kInternetConnection in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _kLocalWiFiConnection in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _OBJC_IVAR_$_Reachability.key_ in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _OBJC_CLASS_$_Reachability in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _OBJC_METACLASS_$_Reachability in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
duplicate symbol _kConnectionDown in:
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Intermediates/MyApplication.build/Debug-iphonesimulator/MyApplication.build/Objects-normal/i386/Reachability.o
    /Users/Library/Developer/Xcode/DerivedData/MyApplication-bchgbqjzuwjzbcbnhwyihhatsoyw/Build/Products/Debug-iphonesimulator/libPOSNirvanaUtils.a(Reachability.o)
ld: 8 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我有像

这样的项目结构

1. 应用
2. 静态库A
3. 静态库B

情况 1）静态库A依赖于静态库B.项目A需要可达性检查。 2）在应用程序项目中添加静态库A. 3）编译时，遇到链接器错误

请帮助解决此问题。

Answer 1

如果此解决方案无效，请检查此..

此错误经常发生的另一个原因是意外导入.m文件而不是.h。

Answer 2

步骤：

1.在目标设置中检查构建阶段。

2.检查文件是否存在两次或一次。

3.如果文件存在两次删除一个。如果没有删除底部最新的文件。

4.再次建造。

Answer 3

Reachability＆amp; libPOSNirvanaUtils.a中有libPOSNirvanaUtils.a个班级您的应用程序，并且您在应用程序中使用Reachability。所以现在你的应用程序有2个libPOSNirvanaUtils.a类的引用。

如果您正在构建Reachability，那么您可以通过两种方式解决此问题：

1. 从目标libPOSNirvanaUtils.a
中删除Reachability班级成员资格
2. 在复制文件中添加Reachability类，从应用程序中删除{{1}}类引用，并使用libPOSNirvanaUtils中的相同类引用。

Answer 4

使用prepareforsegue委托时我遇到了同样的问题。事实证明，我不小心导入了.m文件而不是.h文件。这将解决它。在疯狂添加和删除框架之前，请查看#import语句。

Answer 5

在我的情况下，我得到了这个错误，因为在实现部分的几个文件中声明了相同的命名变量。

@implementation A
int a;
...

@implementation B
int a;
...

给了我＆＃34;重复符号_a ...＆＃34;