将CDATA添加到输出xml文件的宏

Question

我已经使用xml映射输出了一个xml文件。现在，我需要使用宏在特定标签和文本周围添加CDATA。

任何帮助将不胜感激。

  

我现有的xml文件。

func displayAlerts(setCompletion: @escaping (Bool) -> ()) {
        print("                     MapArray.alertNotificationCoordinatesArray before displayAlert snapshot is: \(MapArray.alertNotificationCoordinatesArray)")
        print("                     self.userAlertNotificationArray before displayAlert snapshot is: \(self.userAlertNotificationArray)")

        if self.userAlertNotificationArray.count == 0 {
            ref = Database.database().reference()

            ref?.child("Continent").child("Europe").child("Country").child("Italy").child("Region").child("Emilia-Romagna").child("City").child("Bologna").child("Community").child("Alert Notifications").observeSingleEvent(of: .value, with: { (snapshot) in
                print("         snapshot is: \(snapshot)")
                guard let data = snapshot.value as? [String :[String:String]] else { return } // checking if the snapshot is the dictonary in the form of [String :[String:String]] else return

                for snap in snapshot.children {
                    let alertSnap = snap as! DataSnapshot  // casting the snapshot children is the dictonary in the form of [String:String]
                    let childrenKey = alertSnap.key
                    let alert = alertSnap.value as! [String:String]
                    let dataLatitude = alert["Latitude"]!
                    let dataLongitude = alert["Longitude"]!
                    let type = alert["Description"]!
                    let id = Int(alert["Id"]!)!
                    print("Node Key is: \(snapshot.key)")
                    print("childrenKey is:\(childrenKey)")
                    print("dataLatitude is: \(String(describing: dataLatitude))")
                    print("dataLongitude is: \(String(describing: dataLongitude))")
                    print("type is: \(String(describing: type))")
                    print("id is: \(String(describing: id))")

                    print("data is: \(data)")

                    let doubledLatitude = Double(dataLatitude)
                    let doubledLongitude = Double(dataLongitude)
                    let recombinedCoordinate = CLLocationCoordinate2D(latitude: doubledLatitude!, longitude: doubledLongitude!)

                    let userAlertAnnotation = UserAlert(type: type, coordinate: recombinedCoordinate, firebaseKey: childrenKey, title: type,id: id)
                    self.userAlertNotificationArray.append(userAlertAnnotation)  // array of notifications coming from Firebase
                    MapArray.alertNotificationCoordinatesArray.append(recombinedCoordinate)
                }



                print("Firebase alerts posts retrieved")

                print("                 MapArray.alertNotificationCoordinatesArray after  displayAlert snapshot is: \(MapArray.alertNotificationCoordinatesArray)")
                print("                     self.userAlertNotificationArray after  displayAlert snapshot is: \(self.userAlertNotificationArray)")
                self.mapView.addAnnotations(self.userAlertNotificationArray)
                setCompletion(true)

            })
        }
    } 

  

我要添加CDATA，它必须如下所示：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<QML>
	<QUESTION DESCRIPTION="Eliminate means:" TOPIC="1\2\A" STATUS="Normal">
		<CONTENT TYPE="text/html">
			<STEM><P><STRONG>Eliminate means:<BR></STRONG></P></STEM>
			<IMG src="SRC" border="1"/>
		</CONTENT>
		<ANSWER QTYPE="MC" SHUFFLE="YES" SUBTYPE="VERT">
			<CHOICE ID="0">remove</CHOICE>
			<CHOICE ID="1">assemble</CHOICE>
			<CHOICE ID="2">maintain</CHOICE>
			<CHOICE ID="3">fractionate</CHOICE>
		</ANSWER>
	</QUESTION>
<QML>