Xcode 7.1中架构arm64的未定义符号

Question

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.

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)

Answer 1

It could be that library which consists of the class ADAuthenticationContext isn't compiled for arm64 architecture, only for armv7 / armv7s .

You can disable arm64 support in your project by modifying Supported Architectures and Valid Architectures in Build Settings , then for this case compilation and linking should work.

Note that App Store won't accept your app without arm64 support.

Try to update your library or recompile it by yourself properly if possible.