Qt 6.2.2. iOS & NFC Tag reading; What is possible and what is not?

[Frime]

Hi Community,

I was so happy to learn that Qt NFC now talks to the iOS CoreNFC framework. However, I can't get my code, which works great on Android, to work on iOS.

Actually, I just want to read the UID of a Mifare Ultralight tag. The call to startTargetDetection returns only with the option QNearFieldTarget::TagTypeSpecificAccesss true. A small popup opens, but unfortunately my tag is not detected. Other NFC apps on iOS can read my tags without any problems.

My XCode settings:

• Near Field Communication Tag Reading capability added with the corresponding entries in the entitlements file.
• Privacy - NFC Scan Usage Description added to Info.plist
• CoreNFC.framework dependency added

My code:

NFCReader::NFCReader(QObject *parent) : QObject(parent),
    _manager(new QNearFieldManager(this))
{
    connect(_manager, SIGNAL(targetDetected(QNearFieldTarget*)), this, SLOT(targetDetected(QNearFieldTarget*)));
    connect(_manager, SIGNAL(targetLost(QNearFieldTarget*)), this, SLOT(targetLost(QNearFieldTarget*)));
    connect(_manager, &QNearFieldManager::adapterStateChanged,
            this, &NFCReader::handleAdapterStateChange);
}

void NFCReader::startRead()
{
    qDebug()<< Q_FUNC_INFO;
   // returns true:
    qDebug()<<_manager->startTargetDetection(QNearFieldTarget::TagTypeSpecificAccesss);
}

bool NFCReader::ready()
{
    qDebug()<< Q_FUNC_INFO;
    //false:
    qDebug()<<"A"<<_manager->isSupported(QNearFieldTarget::UnknownAccess);
    // true
    qDebug()<<"B"<<_manager->isSupported(QNearFieldTarget::AnyAccess);
    // unfortunately false,  I expected true here:
    qDebug()<<"C"<<_manager->isSupported(QNearFieldTarget::NdefAccess); 
    // false
    qDebug()<<"D"<<_manager->isSupported(QNearFieldTarget::TagTypeSpecificAccess);
    return  _manager->isEnabled(); // is true
}

void NFCReader::targetDetected(QNearFieldTarget *target)
{
    qDebug()<< Q_FUNC_INFO;
    QString uid = target->uid().toHex().toUpper();
    qDebug()<< uid;
    Q_EMIT uidRead(uid);
}

void NFCReader::targetLost(QNearFieldTarget *target)
{
    qDebug()<< Q_FUNC_INFO;
    target->deleteLater();
}

void NFCReader::handleAdapterStateChange(QNearFieldManager::AdapterState state)
{
    qDebug()<< Q_FUNC_INFO;

    if (state == QNearFieldManager::AdapterState::Online) {
        qDebug()<<"ONLINE";
    } else if (state == QNearFieldManager::AdapterState::Offline) {
        qDebug()<<"OFFLINE";
    }
}

What am I missing?
thanks in advance!