QT获得目下的所有文件名

QString path = "./testSourImage";
QDir dir(path);
if( !dir.exists() )
return ;
dir.setFilter( QDir::Files);
dir.setSorting(QDir::DirsFirst);
QFileInfoList list = dir.entryInfoList();
std::ofstream outfile;
outfile.open("sourImage.txt");
for(int i=0;i<dir.count();i++)
{

QFileInfo fileInfo = list.at(i);
outfile<<std::string((const char *)(fileInfo.fileName()).toLocal8Bit())<<std::endl;
}
outfile.close();
return ;