C++에서 QML 텍스트를 수정하는 방법

Question

Qt를 처음 사용하고 있으며 C++ 코드에서 QML 텍스트 (화면에 표시된 것)를 수정하려고합니다. 텍스트가 수정되었지만 화면에 업데이트되지 않았으므로 텍스트 변수가 수정되었지만 화면의 첫 번째 텍스트는 수정되었습니다.

//main.cpp

#include <QApplication> 
#include <QDeclarativeEngine> 
#include <QDeclarativeComponent> 
#include <QDeclarativeItem> 
#include <QDebug> 
#include "qmlapplicationviewer.h" 

Q_DECL_EXPORT int main(int argc, char *argv[]) 
{ 
    QScopedPointer<QApplication> app(createApplication(argc, argv)); 

    QmlApplicationViewer viewer; 
    viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto); 
    viewer.setMainQmlFile(QLatin1String("qml/textModification/main.qml")); 
    viewer.showExpanded(); 

    QDeclarativeEngine engine; 
    QDeclarativeComponent component(&engine, QUrl::fromLocalFile("qml/textModification/main.qml")); 
    QObject *object = component.create(); 

    QObject *item = qobject_cast<QDeclarativeItem*>(object); 
    QObject *text = item->findChild<QObject*>("text1"); 
    qDebug() << "Text of 'text1' when it's created' -------->" << text->property("text"); 

    text->setProperty("text", "THIS WORKS!"); 

    qDebug() << "Text of 'text1' after modifying it -------->" << text->property("text"); 

    return app->exec(); 
} 

//main.qml

import QtQuick 1.0 

Item { 
    id: item1 
    objectName: "item1" 
    width: 400 
    height: 400 

    Text { 

     id: text1 
     objectName: "text1" 
     x: 0 
     y: 0 
     width: 400 
     height: 29 
     text: "This text should change..." 
     font.pixelSize: 12 
    } 

} 

누군가가 나를 도울 수 : 여기

코드인가?

감사합니다.

Answer 1

이것은 objectName 속성을 사용하여 개체를 찾는 것만큼 유연하지 않을 수 있지만 간단합니다.

MAIN.CPP

#include <QtGui/QApplication> 
#include "qmlapplicationviewer.h" 
#include <QGraphicsObject> 


int main(int argc, char *argv[]) 
{ 
QApplication app(argc, argv); 

QmlApplicationViewer viewer; 
viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto); 
viewer.setMainQmlFile(QLatin1String("qml/TextTest/main.qml")); 
QObject *rootObject = viewer.rootObject(); 
rootObject->setProperty("text1Text",QVariant("Change you text here...")); 

viewer.showExpanded(); 
int returnVal = app.exec(); 
delete rootObject; 
return returnVal; 
} 

main.qml

import QtQuick 1.0 

    Item { 
    id: item1 
    width: 400 
    height: 400 
    property alias text1Text: text1.text 

    Text { 
     id: text1 
     width: 400 
     height: 29 
     color: "red" 
     text: "This text should change..." 
     font.pixelSize: 12 
    } 

    }