QT中QFileDialog的使用

QStringList mimeTypeFilters;
mimeTypeFilters << "image/jpeg" // will show "JPEG image (*.jpeg *.jpg *.jpe)
<< "image/png"  // will show "PNG image (*.png)"
<< "application/octet-stream"; // will show "All files (*)"

QFileDialog dialog(this);
dialog.setMimeTypeFilters(mimeTypeFilters);
dialog.exec();