如何使用Qt应用程序将Id添加到kml文件中的"QDomElement"标签

Question

我正在尝试将id添加到cpp中的QDomElements。我成功地生成了一个kml文件。我想以增量的方式将id添加到像Document、Placemark这样的kml标记中。如何将ID添加到kml文件中的标记中。

QDomProcessingInstruction header = createProcessingInstruction(QStringLiteral("xml"), QStringLiteral("version="1.0" encoding="UTF-8""));
appendChild(header);
QDomElement kmlElement = createElement(QStringLiteral("kml"));
kmlElement.setAttribute(QStringLiteral("xmlns"), "http://www.opengis.net/kml/2.2");

QDomElement m_rootDocumentElement;  m_rootDocumentElement = 
createElement(QStringLiteral("Document"));
kmlElement.appendChild(m_rootDocumentElement);
for(int i = 0; i < qgeoCordinateList.count(); i++){
QDomElement wpPlacemarkElement = createElement("Placemark");
QDomElement wpPlacemarkElement1 = elementById("4");
m_rootDocumentElement.appendChild(wpPlacemarkElement);
wpPlacemarkElement.appendChild(wpPlacemarkElement1);
addTextElement(wpPlacemarkElement, "name", QString::number(i+1));
QDomElement pointElement = createElement("Point");
wpPlacemarkElement.appendChild(pointElement);
addTextElement(pointElement, "Index", QString::number(i));
}
QTextStream stream(&file);
stream << header;
stream << kmlElement;
qDebug() << "kml Data :" << kmlElement.toElement().text().simplified();
file.close();

Answer 1

To add Id into "QDomElement" tag add line where you want to add tag for QDomElement 

wpPlacemarkElement.setAttribute(QStringLiteral("id"), QString::number(i)); 
// i is index of for loop
// add this line into for loop