IOS, when run using UDP programming encounter _OBJC_CLASS_ $ _AsyncUdpSocket, referenced from: the problem

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CFNetwork.framework import no?
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cited a floor reply:

CFNetwork.framework import no?

CFNetwork.framework I imported, thank you, I have solved the problem, it is time to add files directly copied from another file dragged into the project folder, probably compiler Road King is not set correctly, I deleted the file Right after re-add in the project directory, compiled on over