QFileDialog select multiple files or folders

Qt Provides QFileDialog Used to select files or folders , The usage is as follows ：

#include <QDebug>
#include <QFileDialog>

//  Select one or more files 
void Dialog::on_pushBtn_Files_clicked()
{
    
    //  Quickly select a file 
    //QString sFileName = QFileDialog::getOpenFileName(this," Select File ","/","C++ files(*.cpp);;C files(*.c);;Head files(*.h)");
    //qDebug() << " File name ：" << sFileName;

    QFileDialog *fileDialog = new QFileDialog(this);
    fileDialog->setFileMode(QFileDialog::Directory);

    // Set the title of the window 
    fileDialog->setWindowTitle(" Please select a file ");

    // You can also use the following code to set multiple filters 
    QStringList filters;
    filters << "Image files (*.png *.xpm *.jpg)"
            << "Text files (*.txt)"
            << "Any files (*)";
    fileDialog->setNameFilters(filters); // This function name is followed by one more s, Indicates setting multiple filters . See clearly .

    //QFileDialog::ExistingFiles  Multiple files , It can also be used to select folders QFileDialog::Directory.
    fileDialog->setFileMode(QFileDialog::ExistingFiles);

    // If you want to save the file , Then you need to set it again 
    //fileDialog.setAcceptMode(QFileDialog::AcceptSave);

    // Pop-up dialog box 
    if (fileDialog->exec() == QDialog::Accepted)
    {
    
        QStringList listFiles = fileDialog->selectedFiles();
        for (auto fileName : listFiles)
        {
    
            qDebug() << " File name ：" << fileName;
        }
    }
}

//  Select the folder 
void Dialog::on_pushBtn_Dir_clicked()
{
    
    QFileDialog *fileDialog = new QFileDialog(this);
    fileDialog->setFileMode(QFileDialog::Directory);
    fileDialog->exec();
    auto selectDir = fileDialog->selectedFiles();
    if (selectDir.size()>0)
    {
    
        qDebug() << " Folder name :" << selectDir.at(0);
    }
}