打开多个文件

QFileDialog *dlg = new QFileDialog(this);

    dlg->setFilter( "bmp(*.bmp);;jpg(*.jpg);;PNG(*.PNG);;ICO(*.ICO)"); //设置文件过滤器

        filename = dlg->getOpenFileNames();

        for(QStringList::Iterator it=filename.begin();it!=filename.end();it++) //迭代器

        {

            QString aa = (*it);

            QMessageBox::warning(this,"sdf",aa);

        }