soap in Swift 3 - iOS App codez

class ViewController: UIViewController,XMLParserDelegate,URLSessionDelegate{

@IBOutlet var mobileNumberTF: UITextField!
var mutableData : NSMutableData = NSMutableData()
var currentElementName:String = ""
var json:[String:AnyObject] = [:]

override func viewDidLoad() {
super.viewDidLoad()

}

@IBAction func submitClicked(_ sender: Any) {

let soapMessage="\(self.mobileNumberTF.text!)"

let msgLength = String(describing: soapMessage.characters.count)

let url = URL(string: "http://....asmx")
var request = URLRequest(url: url!)
request.addValue("...com", forHTTPHeaderField: "Host")
request.addValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.addValue(msgLength, forHTTPHeaderField: "Content-Length")
request.httpMethod = "POST"
request.httpBody = soapMessage.data(using: String.Encoding.utf8, allowLossyConversion: false)

let session = URLSession.shared

let task = session.dataTask(with: request) { (data, resp, error) in

guard error == nil && data != nil else{

print("connection error or data is nill")

return
}

if resp != nil {

self.mutableData.length = 0;

}

print(self.mutableData)

let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
self.mutableData.append(data!)

let xmlParser = XMLParser(data: self.mutableData as Data)
xmlParser.delegate = self
xmlParser.parse()
xmlParser.shouldResolveExternalEntities = true
print(dataString ?? "omg")

}
task.resume()

}

//xml parser

func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
currentElementName = elementName
print(elementName)
}

func parser(_ parser: XMLParser, foundCharacters string: String) {
if currentElementName == "SendResult" {
var newString = string.replacingOccurrences(of: "[", with: "")
newString = newString.replacingOccurrences(of: "]", with: "")
print("string= \(newString)")

let data = newString.data(using: .utf8)

do{

let j = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers)
print(j)
//Store response in NSDictionary for easy access
let dict = j as? NSDictionary

let amount = "\(dict!["Amount"]!)"
print(amount)

}catch {
print(error)
}
}
}
}