在QTabWidget中添加QlistWidget到tab，为什么第一个tab的listWidget排列跟其他的刚好相反 - QTCN开发网

//后面需要从数据库中获取房间号roomNo来添加tab
    for (int roomNo = 1; roomNo <= 3; ++roomNo) {
        QListWidget *listWidget = new QListWidget();
        this->addButtonToList(roomNo, listWidget);
        ui->tableTabWidget->addTab(listWidget, QString("餐厅%1").arg(roomNo));
        //QIcon icon1(":/new/icon/images/1.ico");
        //tabWidget->addTab(widget, icon1, "Tab1");
    }

//往listWidget中添加内容
void MainWindow::addButtonToList(int roomNo, QListWidget *listWidget)
{
    //设置图片排列
    listWidget->setViewMode(QListView::IconMode);

    //设置listwidget中的按钮不准拖动
    listWidget->setMovement(QListView::Static);
    //listWidget->setDragEnabled(false);

    //设置ListWidget是否可以自动排序,默认是false
    //listWidget->setSortingEnabled(true);

    //qt给的demo中configdialog的例子中默认是竖向的
    //listWidget->setFlow(QListView::TopToBottom);
    listWidget->setFlow(QListView::LeftToRight);

    //设置item图标大小
    listWidget->setIconSize(QSize(100, 80));
    // 需要根据roomNo从数据库中获取餐桌
    for (int var = 1; var <= 35; var++) {
        listWidget->addItem(new QListWidgetItem(QIcon(":/image/image/table.png"), QString("餐桌%1").arg(var)));
    }
    listWidget->setViewMode(QListView::IconMode);
    //设置样式，直接在函数中设置
    listWidget->setStyleSheet("QListWidget{border:1px solid gray; color:black; }"
                              "QListWidget::Item{padding-top:20px; padding-bottom:4px; }"
                              "QListWidget::Item:hover{background:skyblue; }"
                              "QListWidget::item:selected{background:lightblue; color:red; }"
                              "QListWidget::item:selected:!active{border-width:0px; background:lightgreen; }"
                              );

    // 双击信号
    //connect(listWidget,SIGNAL(itemDoubleClicked(QListWidgetItem *p)),this,SLOT());
}