Xcode 7.1 中架构 arm64 的未定义符号
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Undefined symbols for architecture arm64 in Xcode 7.1
提问by RAM
Hi when I try to run my app in Xcode 7.1 on device , I am getting the following error. Can you pls let me know the issue. It runs fine on simulator.
嗨，当我尝试在设备上的 Xcode 7.1 中运行我的应用程序时，出现以下错误。你能告诉我这个问题吗？它在模拟器上运行良好。
Undefined symbols for architecture arm64: "_OBJC_CLASS_$_ADAuthenticationContext", referenced from: objc-class-ref in LoadingViewController.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
架构 arm64 的未定义符号：“_OBJC_CLASS_$_ADAuthenticationContext”，引用自：LoadingViewController.o ld 中的 objc-class-ref：找不到架构 arm64 的符号 clang：错误：链接器命令失败，退出代码为 1（使用 -v查看调用）
回答by Eugene Dudnyk
It could be that library which consists of the class ADAuthenticationContextisn't compiled for arm64architecture, only for armv7/ armv7s.
可能是由该类组成的库ADAuthenticationContext不是为arm64体系结构编译的，而是为armv7/编译的armv7s。
You can disable arm64support in your project by modifying Supported Architecturesand Valid Architecturesin Build Settings, then for this case compilation and linking should work.
您可以禁用arm64通过修改你的项目支持支持的体系和有效的体系结构在生成设置，那么这种情况下编译和链接应该工作。
Note that App Store won't accept your app without arm64support.
请注意，App Store 不会在没有arm64支持的情况下接受您的应用。
Try to update your library or recompile it by yourself properly if possible.
如果可能，请尝试更新您的库或自行重新编译。
