CompileC /Users/aysegulbozdag/Library/Developer/Xcode/DerivedData/poscubeassist-cwwxgxbmmzzuqadfhcjupykrabdo/Build/Intermediates.noindex/poscubeassist.build/Debug-iphonesimulator/poscubeassist.build/Objects-normal/x86_64/AppDelegate.o poscubeassist/AppDelegate.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
出现错误，我该怎么办？我删除了 pods 文件，然后下载了它。