Restful webservice response read in XML swift

I can invoke the and get the response in XMl. But don't know how to parse it and process it.

Below is my code

func callService(usr: String, pwdCode: String) {

    let url = NSURL(string: "http://ift.tt/1v2gF6t")
    var xmlParse:NSString  = ""
    var data : NSData!
    let request = NSMutableURLRequest(URL: url!)
    request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
     request.HTTPMethod = "POST"
    let dictionary = ["email": usr, "userPwd": pwdCode]
    var error: NSError?
    if let body = NSJSONSerialization.dataWithJSONObject(dictionary, options: nil, error: &error) {
        request.HTTPBody = body
    } else {
        println("JSON error: \(error)")
    }

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
        (data, response, error) in
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
       // xmlParse=NSString(data: data, encoding: NSUTF8StringEncoding)!
      // let data = (xmlParse as NSString).dataUsingEncoding(NSUTF8StringEncoding)
      //  NSXMLParser(data : NSData)

        //xmlParse=NSString(data: data, encoding: NSUTF8StringEncoding)!
        //xmlParse=response
        //println(xmlParse)
    }
    task.resume()

}

Can you please help me how i can get the response in above code only.