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#ifndefTESTPROPERTY_H
#defineTESTPROPERTY_H

#include<QObject>

classTestProperty:publicQObject
{
Q_OBJECT
public:
explicitTestProperty(QObject*parent=nullptr);
Q_PROPERTY(QStringtitleREADtitleWRITEsetTitleNOTIFYtitleChanged);

QStringtitle();
voidsetTitle(QStringstrTitle);


signals:
voidtitleChanged();

publicslots:

private:
QStringm_title;

};

#endif//TESTPROPERTY_H

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#include"TestProperty.h"

TestProperty::TestProperty(QObject*parent):QObject(parent)
{

}

QStringTestProperty::title()
{
returnm_title;
}

voidTestProperty::setTitle(QStringstrTitle)
{
m_title=strTitle;
emittitleChanged();
}

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#include<QGuiApplication>
#include<QQmlApplicationEngine>
#include<qglobal.h>
#include"TestProperty.h"

intmain(intargc,char*argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

QGuiApplicationapp(argc,argv);

qmlRegisterType<TestProperty>("TestProperty",1,0,"TestProperty");
QQmlApplicationEngineengine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
if(engine.rootObjects().isEmpty())
return-1;

returnapp.exec();
}

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importQtQuick2.9
importQtQuick.Window2.2
importTestProperty1.0

Window{
visible:true
width:640
height:480
title:qsTr("HelloQt")

TestProperty{
id:testProperty
title:qsTr("HelloWorld")
}

Component.onCompleted:{
title=testProperty.title;
}
}