在 iOS 中使用静态库的“架构 i386 的未定义符号”

Posted 2023-03-07

【中文标题】在 iOS 中使用静态库的“架构 i386 的未定义符号”

【英文标题】："Undefined symbols for architecture i386" using a static library in iOS

【发布时间】：2012-01-20 11:29:36

【问题描述】：

我正在尝试在 xcode 4.2 中创建一个静态库。

我正在按照this 教程中的步骤进行操作。但是，我收到以下错误：

Ld /Users/harishk/Library/Developer/Xcode/DerivedData/Testlib-ailufzhcoulmzrflyhfgbwqbiksx/Build/Products/Debug-iphonesimulator/Testlib.app/Testlib normal i386
    cd /Users/harishk/Desktop/sl/Testlib
    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/clang -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/harishk/Library/Developer/Xcode/DerivedData/Testlib-ailufzhcoulmzrflyhfgbwqbiksx/Build/Products/Debug-iphonesimulator -L/Users/harishk/Desktop/sl/Testlib/Testlib/lib -L/Users/harishk/Desktop/sl/Testlib/../lib -L/Users/harishk/Desktop/sl/Testlib -F/Users/harishk/Library/Developer/Xcode/DerivedData/Testlib-ailufzhcoulmzrflyhfgbwqbiksx/Build/Products/Debug-iphonesimulator -filelist /Users/harishk/Library/Developer/Xcode/DerivedData/Testlib-ailufzhcoulmzrflyhfgbwqbiksx/Build/Intermediates/Testlib.build/Debug-iphonesimulator/Testlib.build/Objects-normal/i386/Testlib.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -objC -all_load -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=50000 -framework UIKit -framework Foundation -framework CoreGraphics -lSimpleLibrary -o /Users/harishk/Library/Developer/Xcode/DerivedData/Testlib-ailufzhcoulmzrflyhfgbwqbiksx/Build/Products/Debug-iphonesimulator/Testlib.app/Testlib

ld: warning: ignoring file /Users/harishk/Desktop/sl/lib/libSimpleLibrary.a, file was built for archive which is not the architecture being linked (i386)
Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_MathFunctions", referenced from:
      objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

【问题讨论】：

您是在尝试创建库还是尝试在应用程序中使用创建的库？

【参考方案1】：

MathFunctions 类丢失。来自您的应用程序项目或来自您使用的SimpleLibrary.a。确保它是构建的编译和链接步骤的一部分。