Can't create QApplication for ios using cmake build

Paltoquet

Hi,

I am currently building a qt base project using cmake.
I face some problems during linking but I succeed to remove them following this guide line:

https://bugreports.qt.io/browse/QTBUG-47336

Now i am trying to run the app on my ipad but i have this error:

You are creating QApplication before calling UIApplicationMain.
If you are writing a native iOS application, and only want to use Qt for
parts of the application, a good place to create QApplication is from within
'applicationDidFinishLaunching' inside your UIApplication delegate.

here is my main:

#include <QtCore/QLibraryInfo>
#include <QtCore/QString>
#include <QtCore/QTranslator>
#include <QtCore/QUrl>
#include <QtQml/QQmlApplicationEngine>
#include <QtQml/QQmlContext>
#include <QtWidgets/QApplication>
#include <iostream>

#include <QApplication>
#include <QtGlobal> // Q_OS_IOS

#include <QtCore/QtDebug>


int main(int argc, char **argv) {
    std::cout << "test" << std::endl;
    QApplication app(argc, argv);
    app.setApplicationName("Designer");
    // main loop
    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:///main.qml")));
    return app.exec();
}

and the main.qml:


import QtQuick 2.7
import QtQuick.Controls 2.0

ApplicationWindow{
    
    
    Rectangle{
        anchors.fill: parent
        color: "red"
    }
}

I find some solutions to this problem but they all were based on some some old version of QT in 2014
https://stackoverflow.com/questions/25042916/run-time-error-for-qt-application-on-ios-built-via-cmake

if i replace my main

int main(int argc, char **argv)

with

extern "C" int qtmn(int argc, char *argv[])

i got this error
entry point (_main) undefined. for architecture arm64

in this bug report:
https://bugreports.qt.io/browse/QTBUG-50986

He suggest to keep the

int main(int argc, char **argv)

I also found this post dealing with the same problem

https://stackoverflow.com/questions/43002064/qt-xcode-ios-entry-point

I don't know where should I look for a possible answer.

Paltoquet

I find a fix:

was a bit hard but the solutions is to add -e,_qt_main_wrapper in your LD flags
If you have some qml look at the link
https://stackoverflow.com/questions/45508043/qt-ios-linker-error-entry-point-main-undefined/45617820#45617820