Connect qt with qml

[Maco10]

Hello. I am making an easy program. I have a qml file with one button an one text field. When I write in the text field and click the button I want to the cpp part write a message in console. My problem is Qt program returns me
QObject::connect: No such slot QApplication::newValue() in ../Prueba/main.cpp:27

My code is:

main.qml
@Rectangle {

signal valueIntroduced();

width: 440;
height: 380;

TextField {...}
    
Button {
    id: bot;

    width: 100;
    height: 50;

    anchors.centerIn: parent;

    onClicked: {
        valueIntroduced();
    }

}@

main.cpp
@QApplication app(argc, argv);

QQmlEngine *engine_ = new QQmlEngine();

QQuickView *view = new QQuickView(engine_, NULL);

Control *obj = new Control();

view->rootContext()->setContextProperty( "obj_", obj );

view->setSource(QUrl(QStringLiteral("qrc:/main.qml")));

view->show();

QObject::connect(view->rootObject(), SIGNAL(valueChanged(QString)),
                 &app, SLOT(newValue()) );

return app.exec();

@

control.h
@class Control : public QObject
{
Q_OBJECT

Q_PROPERTY(QString input READ getInput WRITE setInput NOTIFY inputChanged)

public:
explicit Control(QObject *parent = 0);

public slots:
void newValue() { qDebug() << "The text field has been modified"; }

private:
QString m_input;
};
@

How can I fix my signal? Why fails?

Thanks a lot.

[JKSH]

Hi, and welcome to the Qt Dev Net!

[quote]
@
QObject::connect(view->rootObject(), SIGNAL(valueChanged(QString)),
&app, SLOT(newValue()) );
@
[/quote]Which class should receive the signal? You need to connect to obj, not &app.

[Maco10]

It is already running. Thanks a lot.