我按照说明如何add 3rd party libraries and implement native interfaces（所有3个部分，而不仅仅是第一部分）。我收到似乎与这些接口相关的构建错误，但删除文件后，我仍然收到以下错误：
The following build commands failed:
CompileC build/Build/Intermediates/ArchiveIntermediates/MyApp/IntermediateBuildFilesPath/MyApp.build/Release-iphoneos/MyApp.build/Objects-normal/armv7/native_org_myapp_InterfaceTestPDFImplCodenameOne.o MyApp-src/native_org_myapp_InterfaceTestPDFImplCodenameOne.m normal armv7 objective-c com.apple.compilers.llvm.clang.1_0.compiler
我已从每个org文件夹中删除了native个文件夹。我该怎么做才能摆脱这个错误？
感谢。