问取消QtConcurent计算

EN

class Test : public QObject
{
    Q_OBJECT

public:
    Test(QObject *parent=0) : QObject(parent){}

    void test()
    {
        qDebug() << tr("thread:") <<  QThread::currentThread();

        //computation
        while(true);
    }
};

//QFuture<void> m_concurentResult;
m_concurentResult = QtConcurrent::map(m_collection, &Test::test);
//That's Ok, I have the two outputs :
//  QThread(0x4e21f8, name = "Thread (pooled)")
//  QThread(0x4e21b8, name = "Thread (pooled)")

void Widget::on_pushButton_clicked()
{
    m_concurentResult.cancel();
    m_concurentResult.waitForFinished();
}