Qt 删除文件夹及其子文件夹。参考别人代码。

bool CConfigDlg::removeFolderContent(const QString &folderDir)
{
    QDir dir(folderDir);
    QFileInfoList fileList;
    QFileInfo curFile;
    if(!dir.exists())  {return false;}//文件不存，则返回false
    fileList=dir.entryInfoList(QDir::Dirs|QDir::Files
        |QDir::Readable|QDir::Writable
        |QDir::Hidden|QDir::NoDotAndDotDot
        ,QDir::Name);
    while(fileList.size()>0)//跳出条件
    {
        int infoNum=fileList.size();
        for(int i=infoNum-1;i>=0;i--)
        {
            curFile=fileList;
            if(curFile.isFile())//如果是文件，删除文件
            {
                QFile fileTemp(curFile.filePath());
                fileTemp.remove();
                fileList.removeAt(i);
            }
            if(curFile.isDir())//如果是文件夹
            {
                QDir dirTemp(curFile.filePath());
                QFileInfoList fileList1=dirTemp.entryInfoList(QDir::Dirs|QDir::Files
                    |QDir::Readable|QDir::Writable
                    |QDir::Hidden|QDir::NoDotAndDotDot
                    ,QDir::Name);
                if(fileList1.size()==0)//下层没有文件或文件夹
                {
                    dirTemp.rmdir(".");
                    dirTemp.rmdir("..");
                    fileList.removeAt(i);
                }
                else//下层有文件夹或文件
                {
                    for(int j=0;j<fileList1.size();j++)
                    {
                        if(!(fileList.contains(fileList1[j])))
                            fileList.append(fileList1[j]);
                    }
                }
            }
        }
    }
    return true;
}