Qt通过类成员发出的信号得到通知

Q_EMIT 由类成员发出的。我的示例代码如下:

我的班级.cpp

public:
MyClass::MyClass(QObject* parent) : QObject(parent)
{
    this->manager = new QOfonoManager(this);
}

public slots:
void MyClass::manager_available()
{
    qDebug() << "Manager available";
    QStringList modems = this->manager->modems();
    qDebug() << "Modems:" << modems << "-" ;
}

public:
void MyClass::test()
{
    QStringList modems = this->manager->modems(); //Starts getting available modems

    connect (this->manager,SIGNAL(availableChanged()),this,SLOT(manager_available()));

}

void QOfonoManager::onGetModemsFinished(QDBusPendingCallWatcher* watcher)
{
    ......
    Q_EMIT availableChanged(true);

}


QOfonoManager::QOfonoManager(QObject *parent) :
    QObject(parent),
    d_ptr(new Private)
{
    .....
}

MyClass::test availableChanged 到 MyClass::available_changed Q_EMIT availableChanged(true) 无需修改 QOfonoManager

任何帮助都非常感激。