qtcharts iOs error : unknown method return type: QAbstractAxis*

[mathben]

Hi,
I am trying to manage QtCharts in QML with c++.
I only got this error on iOs, but no error on android, linux, osx.

"Unknown method return type: QAbstractAxis*"

Why only on iOs? If QtCharts was missing, we suppose to got error earlier.

header file :
class CustomChart : public QObject {
Q_PROPERTY(QtCharts::QAbstractAxis* x_axis WRITE setXAxis READ xAxis);
QtCharts::QAbstractAxis* xAxis();
void setXAxis(QtCharts::QAbstractAxis* axis);
[...]
}

qml :
[...]
ChartView {
id: chartViewCustom
Component.onCompleted: {
customChart.x_axis = chartViewCustom.axisX(chartViewCustom.series(0))
}
axisX: DateTimeAxis {
tickCount: 4
minorGridVisible: true
color: "black"
format: "mm:ss"
}
}
[...]

Someone see the problem? I have a lot of code, so i try to focus with interraction of QAbstractAxis.
Thanks for your help.

[SamGrant]

I had a similar issue with iOS and QtCharts...

I had to add this to my *.pro file to get it to work (the 'charts' and QTPLUGIN line...):

QT += core qml quick widgets network websockets charts
QTPLUGIN += qt5charts

--Sam