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diff --git a/src/nfc/ios/qiostagreaderdelegate.mm b/src/nfc/ios/qiostagreaderdelegate.mm
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+++ b/src/nfc/ios/qiostagreaderdelegate.mm
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+/****************************************************************************
+**
+** Copyright (C) 2020 Governikus GmbH & Co. KG
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtNfc module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qiostagreaderdelegate_p.h"
+
+#include "qnearfieldmanager_ios_p.h"
+
+#import <CoreNFC/NFCError.h>
+#import <CoreNFC/NFCTag.h>
+
+QT_USE_NAMESPACE
+
+@implementation QT_MANGLE_NAMESPACE(QIosTagReaderDelegate)
+
+- (instancetype)initWithListener:(QNearFieldManagerPrivateImpl *)listener
+{
+    self = [super init];
+    if (self) {
+        self.listener = listener;
+        self.sessionStoppedByApplication = false;
+        self.message = nil;
+        self.session = nil;
+    }
+
+    return self;
+}
+
+- (void)startSession
+{
+    if (self.sessionStoppedByApplication) {
+        Q_EMIT self.listener->didInvalidateWithError(true);
+        return;
+    }
+
+    if (self.session) {
+        [self.session restartPolling];
+        return;
+    }
+
+    self.session = [[NFCTagReaderSession alloc] autorelease];
+    self.session = [self.session initWithPollingOption:NFCPollingISO14443 delegate:self queue:nil];
+    if (self.session) {
+        if (self.message)
+            self.session.alertMessage = self.message;
+        [self.session beginSession];
+    } else {
+        Q_EMIT self.listener->didInvalidateWithError(true);
+    }
+}
+
+- (void)stopSession:(QString)message
+{
+    if (self.session) {
+        if (self.session.ready) {
+            if (message.isNull())
+                [self.session invalidateSession];
+            else
+               [self.session invalidateSessionWithErrorMessage:message.toNSString()];
+           self.sessionStoppedByApplication = true;
+        } else {
+            self.session = nil;
+        }
+    }
+}
+
+- (void)alertMessage:(QString)message
+{
+    if (self.session && !self.sessionStoppedByApplication)
+        self.session.alertMessage = message.toNSString();
+    else
+        self.message = message.toNSString();
+}
+
+- (void)tagReaderSessionDidBecomeActive:(NFCTagReaderSession*)session
+{
+    if (session != self.session)
+        [session invalidateSession];
+}
+
+- (void)tagReaderSession:(NFCTagReaderSession*)session didInvalidateWithError:(NSError*)error
+{
+    if (session != self.session)
+        return;
+
+    self.session = nil;
+    if (self.sessionStoppedByApplication) {
+        self.sessionStoppedByApplication = false;
+        return;
+   }
+
+    const bool doRestart =
+        !(error.code == NFCReaderError::NFCReaderSessionInvalidationErrorUserCanceled
+        || error.code == NFCReaderError::NFCReaderErrorUnsupportedFeature);
+    Q_EMIT self.listener->didInvalidateWithError(doRestart);
+}
+
+- (void)tagReaderSession:(NFCTagReaderSession*)session didDetectTags:(NSArray<__kindof id<NFCTag>>*)tags
+{
+    if (session != self.session)
+        return;
+
+    bool foundTag = false;
+    for (id<NFCTag> tag in tags) {
+        if (tag.type == NFCTagTypeISO7816Compatible) {
+            foundTag = true;
+            [tag retain];
+            Q_EMIT self.listener->tagDiscovered(tag);
+        }
+    }
+
+    if (!foundTag) {
+        [session restartPolling];
+    }
+}
+
+@end