how to fix this error

[Kazyuka]

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Undefined symbols for architecture x86_64: "OBJC_CLASS$_YKVimeoVideo", referenced from: objc-class-ref in MediaViewController.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

[Reedyuk]

Are you using cocoa pods? looks like the library is not being included in the project so its failing. The reason it passes compilation is because you probably have a value in the search library header field in your project properties.