Segue not being executed in viewController

Question

I am working on my first iOS app.

There is a viewController that checks if the user has already signed in.

print("Usuario actual logeado:",logeado_actual ?? "ninguno")

        if (logeado_actual == "OK"){
             print("logeado:")
            self.performSegue(withIdentifier: "sinlogear", sender: nil)
        }

The print output is

Usuario actual logeado: OK
logeado:

that means that the segue should be executed, but it doesn't.

The segue exists and the Identifier is sinlogear

Is there anything missing or not valid in my code?

EDIT

Full code:

import Alamofire

import UIKit

 class ViewController: UIViewController {

    @IBOutlet weak var txtEmail: UITextField!
    @IBOutlet weak var txtPassword: UITextField!


    @IBOutlet weak var btnAcceder: UIButton!

    @IBOutlet weak var btnContinuar: UIButton!

    @IBOutlet weak var btnRegistro: UIButton!
    @IBOutlet weak var btnOlvidar: UIButton!
    //Defined a constant that holds the URL for our web service
    let URL_USER_REGISTER = "https://.../android_api/login.php"

    struct Usuario: Codable {
        var id: Int
        var activacion: Int
        var autorizado: Int
        var cif: String
        var correo: String
        var cuenta: String
        var direccion: String
        var empresa: String
        var facebook_id: String
        var foto_usuario: String
        var instagram_id: String
        var num_estrellas: Int
        var tel: String
        var token_firebase: String
        var twitter_id: String
        var usuario: String
        var nombre: String
    }

    @IBOutlet weak var txtLabel: UILabel!
    @IBOutlet weak var labelMessage: UILabel!


    let defaults = UserDefaults.standard




    @IBAction func btnLogin(_ sender: Any) {
        print("login pulsado")

        //creating parameters for the post request
        let parameters: Parameters=[
            "email":txtEmail.text!,
            "password":txtPassword.text!
        ]

        print(txtEmail.text!)

         self.txtLabel.text = ""

        //Sending http post request
            Alamofire.request(URL_USER_REGISTER, method: .post, parameters: parameters).responseJSON
            {
                response in
                //printing response
                print(response)

                //getting the json value from the server
                if let resultado = response.result.value {

                    //converting it as NSDictionary
                    let jsonData = resultado as! NSDictionary


                    let id = jsonData.value(forKey:"id") as! NSNumber?
                    let estado = jsonData.value(forKey: "error") as! NSNumber?

                    if estado == 0 {
                    print("login:","OK")
                         self.txtLabel.text = "Datos correctos"
                        print("error:",estado!)
                                          print("id user:",id!)

                        if let json = response.result.value as? [String: Any] {
                            //usuario
                            do {
                                guard let user = json["user"] as? [String: Any],
                                      let usuario = user["usuario"] as? String
                                    else {

                                      print("Failed to parse JSON")
                                      return
                                }

                                self.defaults.set(usuario, forKey: "usuario")
                                self.defaults.set("OK", forKey: "logeado")
                                print(usuario)

                        }
                            //nombre
                                do {
                                    guard let user = json["user"] as? [String: Any],
                                          let nombre = user["nombre"] as? String
                                        else {

                                          print("Failed to parse JSON")
                                          return
                                    }

                                    self.defaults.set(nombre, forKey: "nombre")

                                    print(nombre)

                            }
                            //imageb
                                do {
                                    guard let user = json["user"] as? [String: Any],
                                          let foto_usuario = user["foto_usuario"] as? String
                                        else {

                                          print("Failed to parse JSON")
                                          return
                                    }
                                    self.defaults.set(foto_usuario, forKey: "foto_usuario")

                                    print(foto_usuario)

                            }
                            //correo
                           do {
                               guard let user = json["user"] as? [String: Any],
                                     let correo_usuario = user["correo"] as? String
                                   else {

                                     print("Failed to parse JSON")
                                     return
                               }
                               self.defaults.set(correo_usuario, forKey: "correo")


                               print(correo_usuario)
                       }

                        }




                    }
                    else {
                    print("login:","NO OK")

                        self.txtLabel.text = "Datos incorrectos"

                    }




                }
            }

        }

    override func viewDidLoad() {
        super.viewDidLoad()

            let usuario_actual = self.defaults.string(forKey: "usuario")
            let nombre_usuario_actual = self.defaults.string(forKey: "nombre")
            let foto_usuario_actual = self.defaults.string(forKey: "foto_usuario")
        let correo_usuario_actual = self.defaults.string(forKey: "correo")
        let logeado_actual = self.defaults.string(forKey: "logeado")

        print("Usuario actual:",usuario_actual ?? "ninguno")
        print("Usuario actual nombre:",nombre_usuario_actual ?? "ninguno")
        print("Usuario actual foto:",foto_usuario_actual ?? "ninguno")
         print("Usuario actual correo:",correo_usuario_actual ?? "ninguno")
        print("Usuario actual logeado:",logeado_actual ?? "ninguno")

        performSegue(withIdentifier: "misegue", sender: self)

        if (logeado_actual == "OK"){
             print("logeado:")

        }


        //redondear botones


        btnAcceder.layer.cornerRadius = 5
        btnAcceder.layer.borderWidth = 1
        btnAcceder.layer.borderColor = UIColor.white.cgColor

        btnOlvidar.layer.cornerRadius = 5
        btnOlvidar.layer.borderWidth = 1
        btnOlvidar.layer.borderColor = UIColor.white.cgColor

        btnRegistro.layer.cornerRadius = 5
        btnRegistro.layer.borderWidth = 1
        btnRegistro.layer.borderColor = UIColor.white.cgColor

        btnContinuar.layer.cornerRadius = 5
        btnContinuar.layer.borderWidth = 1
        btnContinuar.layer.borderColor = UIColor.white.cgColor
    }


    }

Answer 1

You should change the performSegue a bit. But first.

1.) Remove the current segue (by clicking the connection in the storyboard and delete it)

2.) Drag a new segue (like you did when created your current one)

3.) Add the same identifier

4.) Fix your performSegue like:

performSegue(withIdentifier: "sinlogear", sender: self)

————

EDIT: A segue cannot be performed from viewDidLoad() because it's too early. This function is runned before the storyboard is there. Consider using viewDidAppear

override func viewDidAppear(){
 //perform the segue here
}