Parse SOAP response using NSXMLParser from web service in Swift -

i'm passing soap message publicly available web service in swift. can see getting soap response , attempting parse using nsxmlparser.

i expecting make use of parser method has foundcharacters parameter - called once , contains string : "error"

i want able access result believe should contained within celsiustofahrenheitresult tag

the web service i'm calling , soap messages can found here.

i can see response contains following elements:

• soap:envelope
• soap:body
• celsiustofahrenheitresponse
• celsiustofahrenheitresult

but why isn't values held in these being printed?

a similar question can found here: parsing soap response using nsxmlparser swift lacks complete answer.

full code view controller calls web service on button press:

import uikit  class viewcontroller: uiviewcontroller, uitextfielddelegate, nsurlconnectiondelegate, nsxmlparserdelegate { var mutabledata:nsmutabledata  = nsmutabledata.alloc()      @iboutlet weak var button: uibutton!     @iboutlet weak var textfield: uitextfield!     override func viewdidload() {         super.viewdidload()         // additional setup after loading view, typically nib.     }     // these counts own reference - checking these later.     var didstartelement = 0     var didendelement = 0     var foundcharacters = 0    func callwebservice(){      // taken input.     var celcius = "10";       var soapmessage = "<?xml version='1.0' encoding='utf-8'?><soap:envelope xmlns:xsi='http://www.w3.org/2001/xmlschema-instance' xmlns:xsd='http://www.w3.org/2001/xmlschema' xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'><soap:body><celsiustofahrenheit xmlns='http://www.w3schools.com/webservices/tempconvert.asmx'><celsius>\(celcius)</celsius></celsiustofahrenheit></soap:body></soap:envelope>"      println(soapmessage);     var urlstring =  "http://www.w3schools.com/webservices/tempconvert.asmx?op=celsiustofahrenheit"     var url = nsurl(string: urlstring)     var therequest = nsmutableurlrequest(url: url!)     var msglength = string(count(soapmessage))      therequest.addvalue("text/xml; charset=utf-8", forhttpheaderfield: "content-type")     therequest.addvalue(msglength, forhttpheaderfield: "content-length")     therequest.addvalue("http://www.w3schools.com/webservices/celsiustofahrenheit", forhttpheaderfield: "soapaction")     therequest.httpmethod = "post"     therequest.httpbody = soapmessage.datausingencoding(nsutf8stringencoding, allowlossyconversion: false)      var connection = nsurlconnection(request: therequest, delegate: self, startimmediately: true)     // not call start since above call start connection       }      @ibaction func convertbuttonclicked(sender: anyobject) {          callwebservice();     }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     }       func connection(connection: nsurlconnection!, didreceiveresponse response: nsurlresponse!) {          println(response);          if let httpresponse = response as? nshttpurlresponse {              // printing status code here.             println("error \(httpresponse.statuscode)")           }          // got response set length of data 0 since adding         // if got data back.         mutabledata.length = 0;     }      func connection(connection: nsurlconnection!, didreceivedata data: nsdata!) {         mutabledata.appenddata(data)     }      // parse result right after loading     func connectiondidfinishloading(connection: nsurlconnection!) {         println(mutabledata)          var xmlparser = nsxmlparser(data: mutabledata)         xmlparser.delegate = self         xmlparser.shouldprocessnamespaces = false         xmlparser.shouldreportnamespaceprefixes = false         xmlparser.shouldresolveexternalentities = false         xmlparser.parse()     }       func parser(parser: nsxmlparser, didstartelement elementname: string, namespaceuri: string?, qualifiedname qname: string?, attributes attributedict: [nsobject : anyobject]) {         didstartelement += 1          // can see elements in soap response being printed.         println(elementname);     }      func parser(parser: nsxmlparser, didendelement elementname: string, namespaceuri: string?, qualifiedname qname: string?) {         didendelement += 1     }      func parser(parser: nsxmlparser, foundcharacters string: string?) {         foundcharacters += 1         // prints "error"         println("found chars: \(string!)");      } } 

the problem not nsxmlparser. have problem request soap message, make sure use correct namespace:

was:

<celsiustofahrenheit xmlns='http://www.w3schools.com/webservices/tempconvert.asmx'> 

fixed:

<celsiustofahrenheit xmlns="http://www.w3schools.com/webservices/">