How do you convert an iPhone OSStatus code to something useful?

Question

I am getting more than a little sick of this iPhone SDK and its documentation...

I am calling AudioConverterNew

in the documentation under Returns: it says \

Answer 1

I combined a few answers. Actually I were looking something like „throw errorForStatusCode(status)”. But in the end achieved:

    guard status == errSecSuccess else {
        throw  NSError(domain: NSOSStatusErrorDomain, code: Int(status), userInfo: [NSLocalizedDescriptionKey: SecCopyErrorMessageString(status, nil) ?? "Undefined error"])
    }

SecCopyErrorMessageString is available from iOS 11.3 https://developer.apple.com/documentation/security/1542001-security_framework_result_codes