How to integrate with Pagseguro using Uiwebview on Swift

Question

I’m trying to integrate Pagseguro with my Swift application using Uiwebview, using POST method, but it didn’t work. following error being returned and the part of my code where I make the call:

error Nserror Domain: "Nscocoaerrordomain" - code: 3840 0x79741210

    let URL = NSURL(string: "https://ws.pagseguro.uol.com.br/v2/checkout/")

    let mutableURLRequest = NSMutableURLRequest(URL: URL!)

    mutableURLRequest.HTTPMethod = "POST"

    let parameters = ["email":"[email protected] ",
        "token":"PUB9DC3C03DD97D4FB4AB1EE70161FE3063",
        "itemId1":"0001",
        "itemDescription1":"Notebook Prata",
        "itemAmount1":"24300.00",
        "itemQuantity1":"1",
        "itemWeight1":"1000"]

    do {

        mutableURLRequest.HTTPBody = try NSJSONSerialization.dataWithJSONObject(parameters, options: NSJSONWritingOptions())

        mutableURLRequest.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
        mutableURLRequest.addValue("charset=ISO-8859-1", forHTTPHeaderField: "Content-Type")

        let config = NSURLSessionConfiguration.defaultSessionConfiguration()

        let session = NSURLSession(configuration: config)

        let task = session.dataTaskWithRequest(mutableURLRequest, completionHandler: {

            (data, response, error) in

            guard let responseData = data else {

                print("Error: did not receive data")

                return

            }

            guard error == nil else {

                print("error calling POST on /posts/1")

                print(error)

                return

            }

            let post: NSDictionary

            do {

                post = try NSJSONSerialization.JSONObjectWithData(responseData, options: []) as! NSDictionary

            }

            catch {

                print("error parsing response from POST on /posts")

                return

            }

            print("resultado: ")

            print(post)

        })

        task.resume()

    }

    catch {

        print("Error parsing response from POST on /posts")

        return

    }