将变量从c++公开给qml

class MyObject : public QObject
{
    Q_OBJECT
    Q_PROPERTY(int myVariable READ getMyVariable WRITE setMyVariable NOTIFY myVariableChanged)

public:
    int getMyVariable() const;
    void setMyVariable(int value);

signals:
    void myVariableChanged();

private:
    int m_myVariable;
};

int MyObject::getMyVariable() const
{
    return m_myVariable;
}

void MyObject::setMyVariable(int value)
{
    if (m_myVariable != value) {
        m_myVariable = value;
        emit myVariableChanged();
    }
}

import com.example 1.0

Item {
    MyObject {
        id: myObject
    }

    Text {
        text: myObject.myVariable
    }
}