qt中怎样全新创建xml文件 [复制链接]

就像下面这样的
<?xml version="1.0" encoding="utf-8"?>
<PARAMETERS>
  <CmdType>2</CmdType>
  <ImgType>2</ImgType>
</PARAMETERS>

找到了    
    QDomElement root = doc.documentElement();
    QDomNodeList nodelist = root.childNodes();

    QDomProcessingInstruction instruction;
    instruction = doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"UTF-8\"");
    doc.appendChild(instruction);

    QDomElement root = doc.createElement(QString("PARAMETERS"));
    doc.appendChild(root); //添加根元素