Application crashes when I expose C++ groupDataModel in qml

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  ApplicationUI.hpp:

  class ApplicationUI : public QObject
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      Q_PROPERTY(bb::cascades::DataModel* dataModel READ dataModel CONSTANT)
  
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          connect(invokeManager,
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          SLOT(childCardDone(const bb::system::CardDoneMessage&)));
  
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  .....
  
  void ApplicationUI::InvokeCamera()
  {
      bb::system::InvokeManager manager;
      bb::system::InvokeRequest request;
      request.setTarget("sys.camera.card");
      request.setAction("bb.action.CAPTURE ");
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      InvokeTargetReply *targetReply = manager.invoke(request);
  
  }
  
  void ApplicationUI::childCardDone(const bb::system::CardDoneMessage &message)
  {
      QString imageLink;
      if (message.reason() == "done") {
  
          imageLink = "file://" + message.data();
      }
      qDebug() << message.reason() << "\n";
      qDebug() << message.dataType() << "\n";
      qDebug() << "file://" + message.data() << "\n";
  
      emit cameraCaptureCompleted(imageLink);
  }
  

  in my QML:

  import bb.cascades 1.0
  import Custom.lib 1.0
  
  Sheet{
  
  Page{
  
  Container{
  
  Label{id: itemPic}
  
  Button{
  
  onClicked: {
  _app.InvokeCamera()
  }
  
  }
  
  }
  
  attachedObjects: [
  
  ApplicationUI {
  onCamerCapturedCompleted: {
  
  itemPic.setText(imageLink)
  
  }}
  ]
  }
  }
  

  As soon as I attach the class the application does not start and the accident, if I change it it is fine.

  Hello

  Instance of ApplicationUI is already exported to QML as _app. One possible approach connects the signal to a JS function:

  Sheet
  {
    onCreationCompleted: {
      _app.cameraCaptureCompleted.connect(captureCompleted)
    }
  
    function captureCompleted(imageLink) {
      console.log("imageLink: " + imageLink)
    }
    ...
  
  }
  

  Element using Qt Quick "Connection" is another option.

  This code should be deleted (it creates a second instance of ApplicationUI, which probably was not provided):

  qmlRegisterType("Custom.lib", 1, 0, "ApplicationUI");
  
  ...
  
  attachedObjects: [
  ApplicationUI {
  onCamerCapturedCompleted: {
  itemPic.setText(imageLink)
  }
  

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