QT软件开发: 将QGraphicsView视图界面保存为图片

 QPixmap pix=ui->graphicsView->grab();

#include <QDialog>
#include <QLabel>
void MainWindow::on_pushButton_clicked()
{
    QPixmap pix=ui->graphicsView->grab();
    QDialog *dialog=new QDialog;
    dialog->setWindowTitle("图片展示");
    QHBoxLayout *layout=new QHBoxLayout;
    QLabel *label=new QLabel;
    label->resize(800,480);
    pix=pix.scaled(label->width(),label->height());
    label->setPixmap(pix);
    layout->addWidget(label);
    dialog->setLayout(layout);
    dialog->show();
    dialog->exec();
    delete dialog;
}