CFURLError.propertyKeyUnavailableError Indicates a property key was unavailable. Declarationcase propertyKeyUnavailableError See AlsoConstantsCFURLError.unknownErrorCFURLError.unknownSchemeErrorCFURLError.resourceNotFoundErrorCFURLError.resourceAccessViolationErrorCFURLError.remoteHostUnavailableErrorCFURLError.improperArgumentsErrorCFURLError.unknownPropertyKeyErrorCFURLError.timeoutError