Xcode 12 HaishinKit lib 构建错误：架构 x86_64 的未定义符号

Question

安装 pod 后无法构建项目：（在 Xcode 11 上没问题 [https://github.com/shogo4405/HaishinKit.swift][1]

  "__swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers", referenced from:
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(ASClass.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(AVRecorder.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(GLHKView.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(HTTPService.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(IOComponent.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(AudioIOComponent.o)
      __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit in libHaishinKit.a(MTHKView.o)
      ...
     (maybe you meant: __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_HaishinKit)
  "__swift_FORCE_LOAD_$_swiftCoreMIDI", referenced from:
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(ASClass.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(AVRecorder.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(GLHKView.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(HTTPService.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(IOComponent.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(AudioIOComponent.o)
      __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit in libHaishinKit.a(MTHKView.o)
      ...
     (maybe you meant: __swift_FORCE_LOAD_$_swiftCoreMIDI_$_HaishinKit)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)```


  [1]: https://github.com/shogo4405/HaishinKit.swift

Answer 1

在项目中使用 Xcode 创建一个新的空 Swift 文件对我有用。我真的不知道为什么，但 Xcode 修复了一切。