SecCopyErrorMessageString gives "Use of unresolved identifier" in swift

Question

Trying to use SecCopyErrorMessageString to interpret errorCode. in swift :

    var result: OSStatus
    result = SecItemAdd(query as CFDictionary, nil);


    if result != errSecSuccess {
    let errorDescription = SecCopyErrorMessageString(result,nil)
   //     NSLog("Keychain Error: %@", errorDescription)

The error of "Unresolved identifier" starts from "SecCopyError..."

Answer 1

The SecCopyErrorMessageString function only became available on iOS in version 11.3. Prior to that, it could only be used on OS X.