创建工具条ToolBar

    /***ToolBar***/
    QToolBar * tlb_ImageOpen;
    QToolBar * tlb_VideoOpen;
    QToolBar * tlb_AudioOpen;

void MainWindow::createToolbar()
{
 tlb_ImageOpen = addToolBar(tr("Image"));
 tlb_ImageOpen->addAction(act_openImage);

 tlb_VideoOpen = addToolBar(tr("Video"));
 tlb_ImageOpen->addAction(act_openVideo);

 tlb_AudioOpen = addToolBar(tr("Audio"));
 tlb_ImageOpen->addAction(act_openAudio);
}