QWidget.show导致界面卡住解决方法

QWidget.show导致界面卡住
很奇怪的问题，定义了一个QWidget，显示背景图片，但是每当加载图片的时候，转动的图标就会卡住，但是删除show方法则不会卡住，而且当我使用resize()函数调整界面分辨率时发现图标实际上还是动的。
求大侠解读。。谢谢
代码如下：

C/C++ code



graphwidgt::graphwidgt(QWidget *parent) :
    QGraphicsView(parent), m_pageOffset(0), top(1), bottom(2), row(1), col(0), left(0), right(0)
{
    num = 0;
    //解决中文乱码问题
    QTextCodec *codec = QTextCodec::codecForName("GB2312");
    QTextCodec::setCodecForLocale(codec);
    QTextCodec::setCodecForCStrings(codec);
    QTextCodec::setCodecForTr(codec);
#if 0 
    connect(&m_pageAnimator, SIGNAL(frameChanged(int)), SLOT(shiftPage(int)));
    m_pageAnimator.setDuration(600);
    m_pageAnimator.setFrameRange(0, 1000);
    m_pageAnimator.setCurveShape(QTimeLine::LinearCurve);
    m_pageAnimator.setUpdateInterval(5);
#endif
    m_pChildView = NULL;

    QGraphicsScene *m_scene = new QGraphicsScene(this);

    //原点在中心点
    m_scene->setSceneRect(sceneCenterX, sceneCenterY, 320, 240);
    //不使用index作为item搜索，index适用于静态scene
    m_scene->setItemIndexMethod(QGraphicsScene::NoIndex);

    /* 将元素背景图片添加到列表中 */
    QList<QPixmap> pixmaps;
    QDirIterator it(":/", QStringList() << "*.png");

    while (it.hasNext() && pixmaps.size() < mouseCount)
    {
        pixmaps << it.next();
    }

    m_pWidget = new QGraphicsWidget();
    m_group = new QGraphicsItemGroup(m_pWidget);
    /******************/
    int i = 100;
    int num = 0;
    /* 添加menu元素 */
    for (int j = 0; j < rowCounts; j++)
    {
        //QGraphicsItemGroup *group = m_scene->createItemGroup(m_scene->selectedItems());

        for (int k = 0; k < colCounts; k++)
        {
            num++;
            QPixmap pixmap(pixmaps.at(num % pixmaps.size()));
            //pixmap = pixmap.scaledToWidth(200);
            QZteLabel *item = new QZteLabel(this);
            item->setPixmap(pixmap);
            m_scene->addItem(item);

            item->setPos(200 * k + 100, 50 + 230 * j);

            //item->setZValue(1);
            m_positions[j] << QPointF(item->QGraphicsPixmapItem::pos().x(), item->QGraphicsPixmapItem::pos().y());
            m_items[j] << item;
            m_group->addToGroup(item);
        }

        //m_group.append(group);
    }
//    m_scene->addItem(m_group);

    m_scene->addItem(m_pWidget);
   

setScene(m_scene);


    //view.centerOn((sceneCenterX + sceneWidth) / 2, (sceneCenterY + sceneHeight) / 2);
    //渲染提示，Antialiasing使得边缘平滑，效果非常好，QPainter是低层次的绘图
//    setRenderHint(QPainter::Antialiasing);
    //代替默认背景
    //setBackgroundBrush(QPixmap(":/background/background.png"));

    //setStyleSheet("background:transparent");


    setAttribute(Qt::WA_TranslucentBackground, true);
    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
    //setWindowFlags(Qt::WType_TopLevel|Qt::WStyle_StaysOnTop);
    setCacheMode(QGraphicsView::CacheBackground);
    //刷新模式，矩形刷新
    setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    //view.setDragMode(QGraphicsView::ScrollHandDrag);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setAlignment(Qt::AlignLeft | Qt::AlignTop);
    //QT_TRANSLATE_NOOP固定标题，中文乱码问题
    setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice 老鼠"));
    //QList<>remove有问题
    //view.items().removeAt(0);
    //resize有可能导致无穷递归
    resize(viewWidth, viewHight);
    QRectF boundingRect = m_items[0][1]->boundingRect();

    on_actionZoom_Widget_triggered();
#if 0
    m_Timer.setInterval(100);
    connect(&m_Timer, SIGNAL(timeout()), this, SLOT(slideUp()));
    m_Timer.start(3000);
#endif
}

------解决方案--------------------
Qt哪个版本？

QWidget.show导致界面卡住解决方法

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