Qt官方示例-QML扩展方法

class BirthdayParty : public QObject
{
    ...
    Q_INVOKABLE void invite(const QString &name);
    ...
}

qmlRegisterType<BirthdayParty>("People", 1,0, "BirthdayParty");

import QtQuick 2.0
import People 1.0

BirthdayParty {
    host: Person {
        name: "Bob Jones"
        shoeSize: 12
    }
    guests: [
        Person { name: "Leo Hodges" },
        Person { name: "Jack Smith" },
        Person { name: "Anne Brown" }
    ]

    Component.onCompleted: invite("William Green")
}