var json error code

sorry my codes are below

import UIKit

class registerPageViewController: UIViewController {

@IBOutlet weak var userEmailTextField: UITextField!

@IBOutlet weak var userPasswordTextField: UITextField!

@IBOutlet weak var repeatPasswordTextField: UITextField!

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional set ups after loading the veiw

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resorces taht can be recreated

}

@IBAction func registerButtonTapped(sender: AnyObject) {

let userEmail = userEmailTextField.text;

let userPassword = userPasswordTextField.text;

let userRepeatPassword = repeatPasswordTextField.text;

// Check for empty feilds

if(userEmail!.isEmpty || userPassword!.isEmpty || userRepeatPassword!.isEmpty)

{

// Display alert message

displayMyAlertMessage("All fields are required");

return;

}

// Check if passwords match

if(userPassword != userRepeatPassword)

{

// Display an alert message

displayMyAlertMessage("Passwords do not match");

return;

}

// Send user data to server side

let myUrl = NSURL(string: "localhost/project/userRegister");

let request = NSMutableURLRequest(URL:myUrl!);

request.HTTPMethod = "POST";

let postString = "email=\(userEmail)&password=\(userPassword)";

request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);

let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {

data, response, error in

if error != nil {

print("error= \(error)")

return

}

var err: NSError?

var json = NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers, error: &err) as? NSDictionary

if let parseJSON = json {

var resultValue = parseJSON["status"] as? String

print("result: \(resultValue)")

var isUserRegistered:Bool = false;

if(resultValue=="Success") { isUserRegistered = true; }

var messageToDisplay:String = parseJSON["message"] as String!;

if(!isUserRegistered)

{

messageToDisplay = parseJSON["message"] as String!;

dispatch_async(dispatch_get_main_queue(), {

// Display alert message with confirmation.

var myAlert = UIAlertController(title:"Alert", message:messageToDisplay, preferredStyle: UIAlertControllerStyle.Alert);

let okAction = UIAlertAction(title:"OK", style:UIAlertActionStyle.Default){ action in

self.dismissViewControllerAnimated(true, completion:nil);

}

myAlert.addAction(okAction);

self.presentViewController(myAlert, animated: true, completion: nil);

});

}

}

task.resume()

}

func displayMyAlertMessage(userMessage:String)

{

var myAlert = UIAlertController(title:"Alert", message:userMessage, preferredStyle: UIAlertControllerStyle.Alert);

let okAction = UIAlertAction(title:"Ok", style:UIAlertActionStyle.Default, handler:nil);

myAlert.addAction(okAction);

self.presentViewController(myAlert, animated:true, completion:nil);

}

}

Swift 2 has replaced the 'error' parameter with the 'try' keyword in many cases. Sorry I don't know the correct syntax off the top of my head (auto complete is your friend) but if you Google "swift try syntax" you will find some examples.

Should replace

            var err: NSError?
            var json = NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers, error: &err) as? NSDictionary

with sthing like

do {
      json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers)
      if let parseJSON = json {
          var resultValue = parseJSON["status"] as? String
          print("result: \(resultValue)")
          // …
          }
    catch {      
        print("Error")
     }