ios - Request on php script with nsurlconnection -

i try send value server code have error on line:

let reply = nsurlconnection.sendsynchronousrequest(request, returningresponse:&response, error: &error)

the error : argument in call "error"

var yoururl="mylink" let url = nsurl(string:yoururl) let cachepolicy = nsurlrequestcachepolicy.reloadignoringlocalcachedata var request = nsmutableurlrequest(url: url!, cachepolicy: cachepolicy, timeoutinterval: 2.0) request.httpmethod = "post"  // set content-type in http header let boundaryconstant = " v2ymhfg03esomerandomstuffhbqgzcako6jy"; let contenttype = "multipart/form-data; boundary=" + boundaryconstant nsurlprotocol.setproperty(contenttype, forkey: "content-type", inrequest: request)  // set data  var datastring = "my value"  let requestbodydata = (datastring nsstring).datausingencoding(nsutf8stringencoding) request.httpbody = requestbodydata  var response: nsurlresponse? = nil var error: nserror? = nil let reply = nsurlconnection.sendsynchronousrequest(request, returningresponse:&response, error: &error)  let results = nsstring(data:reply!, encoding:nsutf8stringencoding)  if let datafromstring = results!.datausingencoding(nsutf8stringencoding, allowlossyconversion: false) {  let json = json(data: datafromstring)   if(json=="0"){  print("\n dati non validi");  }  else{  print("\n account creato"); } } 

you should never use sendsynchronousrequest blocking call. deprecated ios 9.0 onwards. instead can use nsurlsession. try out following code

var yoururl="mylink" let url = nsurl(string:yoururl) let request:nsmutableurlrequest = nsmutableurlrequest(url: url) let boundaryconstant = "v2ymhfg03esomerandomstuffhbqgzcako6jy"; let contenttype = "multipart/form-data; boundary=" + boundaryconstant nsurlprotocol.setproperty(contenttype, forkey: "content-type", inrequest: request) var datastring = "my value" request.httpmethod = "post" request.httpbody = (datastring nsstring).datausingencoding(nsutf8stringencoding) let task = nsurlsession.sharedsession().datataskwithrequest(request, completionhandler: { (data, response, error) -> void in     //reponse recieved     //in case response string saved in data, of type nsdata     do{          let str = try nsjsonserialization.jsonobjectwithdata(data!, options: nsjsonreadingoptions.allowfragments) as! [string:anyobject]          print(str)     }     catch {          print("json error: \(error)")     }     }) task.resume()