QTimer连接槽的问题啊，一直连接错误

MainWindow::MainWindow(QWidget *parent) : QWidget(parent), drawObstacle(this)
{
    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));

    scene = new QGraphicsScene;
    scene->setSceneRect(-300, -300, 600, 600);

    //addEnemey();
    circle = new Enemy;
    circle->setPos(0,0);
    scene->addItem(circle);

    view = new QGraphicsView;
    view->setScene(scene);
    view->setRenderHint(QPainter::Antialiasing);
    view->setBackgroundBrush(Qt::white);

    view->show();

    QTimer *timer = new QTimer(this);
    QObject::connect(&timer, SIGNAL(timeout()), this, SLOT(updateAdvance()));
    timer->start(1000 / 33);
}

QObject::connect(&timer, SIGNAL(timeout()), this, SLOT(updateAdvance()))一直报错，求解释啊
updateAdvance()已在mainwindow中声明槽了



错误:no matching function for call to 'MainWindow::connect(QTimer**, const char*, MainWindow* const, const char*)'

candidates are: static bool QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)

note: bool QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
[解决办法]
QObject::connect(timer, SIGNAL(timeout()), this, SLOT(updateAdvance()));
timer都是new 出来的了，不要再取地址了