Fix some qt6 compile error

src/lib/datatypes/ticket.cpp

@@ -68,7 +68,11 @@ QVariant Ticket::ticketTokenData() const
     } else if (d->ticketToken.startsWith(QLatin1String("azteccode:"), Qt::CaseInsensitive)) {
         return ticketToken().mid(10);
     } else if (d->ticketToken.startsWith(QLatin1String("aztecbin:"), Qt::CaseInsensitive)) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
         return QByteArray::fromBase64(d->ticketToken.midRef(9).toLatin1());
+#else
+        return QByteArray::fromBase64(QStringView(d->ticketToken).mid(9).toLatin1());
+#endif
     } else if (d->ticketToken.startsWith(QLatin1String("barcode128:"), Qt::CaseInsensitive)) {
         return ticketToken().mid(11);
     } else if (d->ticketToken.startsWith(QLatin1String("datamatrix:"), Qt::CaseInsensitive)) {
@@ -76,7 +80,11 @@ QVariant Ticket::ticketTokenData() const
     } else if (d->ticketToken.startsWith(QLatin1String("pdf417:"), Qt::CaseInsensitive)) {
         return ticketToken().mid(7);
     } else if (d->ticketToken.startsWith(QLatin1String("pdf417bin:"), Qt::CaseInsensitive)) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
         return QByteArray::fromBase64(d->ticketToken.midRef(10).toLatin1());
+#else
+        return QByteArray::fromBase64(QStringView(d->ticketToken).mid(10).toLatin1());
+#endif
     }
     return ticketToken();
 }

src/lib/engine/extractorfilter.cpp

@@ -136,7 +136,11 @@ void ExtractorFilter::setScope(Scope scope)
 
 static QString valueForJsonPath(const QJsonObject &obj, const QString &path)
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     const auto pathSections = path.splitRef(QLatin1Char('.'));
+#else
+    const auto pathSections = QStringView(path).split(QLatin1Char('.'));
+#endif
     QJsonValue v(obj);
     for (const auto &pathSection : pathSections) {
         if (!v.isObject()) {

src/lib/jsapi/jsonld.cpp

@@ -351,8 +351,13 @@ QJSValue JsApi::JsonLd::toGeoCoordinates(const QString &mapUrl)
         if (match.hasMatch()) {
             auto geo = m_engine->newObject();
             geo.setProperty(QStringLiteral("@type"), QStringLiteral("GeoCoordinates"));
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
             geo.setProperty(QStringLiteral("latitude"), match.capturedRef(1).toDouble());
             geo.setProperty(QStringLiteral("longitude"), match.capturedRef(2).toDouble());
+#else
+            geo.setProperty(QStringLiteral("latitude"), match.capturedView(1).toDouble());
+            geo.setProperty(QStringLiteral("longitude"), match.capturedView(2).toDouble());
+#endif
             return geo;
         }
     }

src/lib/knowledgedb/airportnametokenizer_p.h

@@ -9,7 +9,7 @@
 
 #include <QStringView>
 
-class QStringList;
+#include <QStringList>
 
 namespace KItinerary {