QT信号传递QVector到槽

SS.h

#ifndef SS_H
#define SS_H

#include <QVector>
#include <QObject>

#include <iostream>

class SS : public QObject {
    Q_OBJECT
    public:
    void prt()
    {
        if (_vec.size() == 0)
            std::cout << "no data" << std::endl;
        for (int i=0; i<_vec.size(); ++i)
            std::cout << _vec[i] << "   ";
        std::cout << std::endl;
    }
    void run()
    {
        QVector<int> vec;
        vec.push_back(1);
        vec.push_back(13);
        vec.push_back(113);
        emit notifyVector(vec);
    }
    public slots:
    void onGotVector(QVector<int> vec)
    {
        _vec = vec;
    }
    signals:
    void notifyVector(QVector<int>);

    private:
    QVector<int> _vec;
};

#endif // SS_H

main.cpp

#include <QCoreApplication>
#include "SS.h"


int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    char buf[13] = {0};
    buf[0] = 'a';
    QString qStr(buf);
    std::string sStr(buf, sizeof(buf));
    std::cout << "QString: "     << qStr.length() << std::endl;
    std::cout << "std::string: " << sStr.length() << std::endl;

    SS ss1, ss2;
    QObject::connect(&ss1, SIGNAL(notifyVector(QVector<int>)), &ss2, SLOT(onGotVector(QVector<int>)));
    ss2.prt();
    ss1.run();
    ss2.prt();


    return a.exec();
}

运行结果：

QString: 1
std::string: 13
no data

1   13   113