链接器错误：未定义的符号，未找到的符号 [英] Linker error: undefined symbols, symbols not found

问题描述

我收到这些Apple Mach-O Linker错误，我不知道如何阅读这些内容。在我的项目中导入CLCredentialHeader.h和CLCredentialHeader.m后出现这些错误。

I'm getting these Apple Mach-O Linker errors and I don't know how to read these things. I got these error after importing "CLCredentialHeader.h" and "CLCredentialHeader.m" in my project.

Undefined symbols for architecture armv7:
  "_OBJC_CLASS_$_SFHFKeychainUtils", referenced from:
      objc-class-ref in CLCredentialHandler.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

推荐答案

确保 SFHFKeychainUtils.m 出现在构建目标的编译源构建阶段中。有时，在Xcode中向项目添加文件不会将所有实现文件添加到适当的目标。

Make sure that SFHFKeychainUtils.m appears in the "Compile Sources" Build Phase for your build target. Sometimes, adding files to a project in Xcode doesn't add all implementation files to the appropriate targets.

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