Qt读取文件夹 QDir

//读取文件夹
QTreeWidgetItem* Create::readDir(QString str,QString filename){

    //新建父节点
    QStringList fileDir;
    fileDir<<filename;
    QTreeWidgetItem *father=new QTreeWidgetItem(fileDir);
    father->setText(1,str);
    QDir dir(str);
    if(dir.exists()){
        /*************************************************************/
        QFileInfoList list = dir.entryInfoList();//获取文件夹内部列表
        for (int i = 0; i < list.size(); i++) {//循环读取文件夹
            QFileInfo fileInfo = list.at(i);
            if(fileInfo.fileName()=="."|fileInfo.fileName()==".."){
                i=i+1;
                continue;
            }else{
                if(fileInfo.isDir()){//是否为文件夹
                    //对该子节点新建节点
                    father->addChild(readDir(fileInfo.filePath(),fileInfo.fileName()));//循环读取文件夹内容
                }else{
                    QStringList list;
                    list<<fileInfo.fileName();
                    QTreeWidgetItem *node1=new QTreeWidgetItem(list);//给每个文件添加节点
                    node1->setText(1,fileInfo.filePath());
                    father->addChild(node1);
                }
            }
        }
    }
    return father;
}