Project Alamofire conversion to Swift 3.0

Question

I have the following code when I want to make a call to the server:

let mutableURLRequest = NSMutableURLRequest(url: URL)
            mutableURLRequest.httpMethod = "POST"

let parameters = ["SessionID": sessionID]
do {
     mutableURLRequest.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: JSONSerialization.WritingOptions())
   } catch {}

mutableURLRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")

Alamofire.request(**mutableURLRequest**).responseJSON{

response in if let JSON = response.result.value{}}

Where the text is BOLD is giving me error in this variable

Argument type 'NSMutableURLRequest' does not conform to expected type 'URLRequestConvertible'

yet you give me the following option

Fix-it Insert as! URLRequestConvertible

If I accept the suggestion is put in the code what they say but the error persists and tells to put again and is this infinitely.

Does anyone know how to solve this problem?

Answer 1

Swift 3 you must use Urlrequest instead of Nsurlrequest. When it is Nsmutableurlrequest you should also use Urlrequest but as Urlrequest is a Structure and not a class to be able to change its properties you need to declare your object as variable instead of constant. In addition you are passing URL where a URL object should be:

var mutableURLRequest = URLRequest(url: URL(string: "http://www.exemplo.com")!)

Answer 2

Not being a direct answer to the question, and to be able to put some code here, I just wanted to indicate an alternative to using Alamofire only to make HTTP requests. The Alamofire is a cannon and I suggest using it only when necessary. That said, I leave here a code that can be pasted directly into a playground (Xcode 8) and GET to an endpoint of the Stack overflow api.

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

let url = URL(string: "https://api.stackexchange.com/2.2/answers?order=desc&sort=activity&site=stackoverflow")!
var request = URLRequest(url: url)
let session = URLSession(configuration: URLSessionConfiguration.default)

session.dataTask(with: request) { (data, response, error) in
    print("response:", response)
    print("error: ", error)

    var responseDictionary: NSDictionary?
    if data != nil {
        do {
            responseDictionary = try JSONSerialization.jsonObject(with: data!,
                                                 options: []) as? NSDictionary
            print(responseDictionary)
        } catch {
            print("error")
        }
    }


    }.resume()