Tukukkk

I don't really understand what's wrong with my code because I did exactly the same thing as what I did on another controller and now it works. When I click on the button, nothing happens, the function is not called.

Here is my code :

class ViewControllerHome: UIViewController, UITextViewDelegate {





var btnFR : UIButton = {

    let btn = UIButton()

    btn.setTitle("", for: UIControlState.normal)

    btn.setImage(#imageLiteral(resourceName: "Bouton FR"), for: UIControlState.normal)

    btn.translatesAutoresizingMaskIntoConstraints = false

    btn.addTarget(self, action: #selector(ViewControllerHome.pressBtnFR), for: UIControlEvents.touchUpInside)

    return btn

}()



func pressBtnFR() {

    saveUserLanguage(language: "FR")

    print(ViewControllerHome.getloadLanguage())

}

Thanks in advance for your help.

As you told me, I later added the target. But it doesn't work any better. Here is my code in its entirety.

class ViewControllerHome: UIViewController, UITextViewDelegate {



var currentScreen : Int8?



var imgVwBackground : UIImageView = {

    let iv = UIImageView()

    iv.image = #imageLiteral(resourceName: "Background")

    iv.translatesAutoresizingMaskIntoConstraints = false

    return iv

}()



var imgVwLogo : UIImageView = {

    let iv = UIImageView()

    iv.image = #imageLiteral(resourceName: "LOGO MJM")

    iv.translatesAutoresizingMaskIntoConstraints = false

    return iv

}()



var imgVwAppName : UIImageView = {

    let iv = UIImageView()

    iv.image = #imageLiteral(resourceName: "MAROLLES")

    iv.translatesAutoresizingMaskIntoConstraints = false

    return iv

}()



var btnFR : UIButton = {

    let btn = UIButton()

    btn.setTitle("", for: UIControlState.normal)

    btn.setImage(#imageLiteral(resourceName: "Bouton FR"), for: UIControlState.normal)

    btn.translatesAutoresizingMaskIntoConstraints = false

    //btn.addTarget(self, action: #selector(ViewControllerHome.pressBtnFR), for: UIControlEvents.touchUpInside)

    return btn

}()



var btnNL : UIButton = {

    let btn = UIButton()

    btn.setTitle("", for: UIControlState.normal)

    btn.setImage(#imageLiteral(resourceName: "Bouton NL"), for: UIControlState.normal)

    btn.translatesAutoresizingMaskIntoConstraints = false

    btn.addTarget(self, action: #selector(ViewControllerHome.pressBtnNL), for: UIControlEvents.touchUpInside)

    return btn

}()





static let USER_LANGUAGE_KEY : String = "USER_LANGUAGE"

static let USER_MASCOT_GENDER_KEY : String = "MASCOT_GENDER"

let MASCOT_BOY_NAME : String = "Maxime"

let MASCOT_GIRL_NAME : String = "Julie"



override func viewDidLoad() {

    super.viewDidLoad()



    // Do any additional setup after loading the view.



    screen1()

    self.btnFR.addTarget(self, action: #selector(pressBtnFR), for:.touchUpInside)

}



override func didReceiveMemoryWarning() {

    super.didReceiveMemoryWarning()

    // Dispose of any resources that can be recreated.

}



@IBAction func unwindfromOption(_ segue: UIStoryboardSegue) {



}



//-----------------screen 1 : language choice--------------------



let french : String = "Français"

let dutch : String = "Nederlands"



func pressBtnFR() {

    saveUserLanguage(language: "FR")

    print(ViewControllerHome.getloadLanguage())

}



func pressBtnNL() {

    saveUserLanguage(language: "NL")

    print(ViewControllerHome.getloadLanguage())

}



func saveUserLanguage (language : String) {

    let userDefaultsTemp = UserDefaults.standard

    userDefaultsTemp.set(language, forKey: ViewControllerHome.USER_LANGUAGE_KEY)

}



static func getloadLanguage () -> String {

    var language : String = ""

    let userDefaultsTemp = UserDefaults.standard

    let languageTemp: String? = userDefaultsTemp.object(forKey: ViewControllerHome.USER_LANGUAGE_KEY) as? String

    if languageTemp != nil {

        language = languageTemp!

    }

    return language

}

//----------Visual configuration---------------  

func screen1 () {

    let fibo236 : CGFloat = 0.236

    let fibo382 : CGFloat = 0.382

    let fibo5 : CGFloat = 0.5

    let fibo618 : CGFloat = 0.618

    let fibo786 : CGFloat = 0.786



    currentScreen = 1



    view.addSubview(imgVwBackground)

    imgVwBackground.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true

    imgVwBackground.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true

    imgVwBackground.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true

    imgVwBackground.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true



    imgVwBackground.addSubview(imgVwAppName)

    imgVwAppName.centerXAnchor.constraint(equalTo: imgVwBackground.centerXAnchor).isActive = true

    imgVwAppName.centerYAnchor.constraint(equalTo: imgVwBackground.centerYAnchor, constant: 20).isActive = true

    imgVwAppName.widthAnchor.constraint(equalTo: imgVwBackground.widthAnchor, multiplier: fibo5).isActive = true

    imgVwAppName.heightAnchor.constraint(equalTo: imgVwAppName.widthAnchor, multiplier:fibo5).isActive = true



    imgVwBackground.addSubview(imgVwLogo)

    imgVwLogo.bottomAnchor.constraint(equalTo: imgVwAppName.topAnchor, constant: -20).isActive = true

    imgVwLogo.centerXAnchor.constraint(equalTo: imgVwBackground.centerXAnchor, constant: 0).isActive = true

    imgVwLogo.widthAnchor.constraint(equalTo: imgVwAppName.widthAnchor, multiplier: fibo382).isActive = true

    imgVwLogo.heightAnchor.constraint(equalTo: imgVwLogo.widthAnchor, multiplier: 1.618).isActive = true



    imgVwBackground.addSubview(btnFR)

    btnFR.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: fibo236/2.5).isActive = true

    btnFR.widthAnchor.constraint(equalTo: btnFR.heightAnchor, multiplier: 1).isActive = true

    btnFR.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -80).isActive = true

    btnFR.rightAnchor.constraint(equalTo: view.centerXAnchor, constant: -7.5).isActive = true



    imgVwBackground.addSubview(btnNL)

    btnNL.heightAnchor.constraint(equalTo: btnFR.heightAnchor).isActive = true

    btnNL.widthAnchor.constraint(equalTo: btnFR.widthAnchor).isActive = true

    btnNL.centerYAnchor.constraint(equalTo: btnFR.centerYAnchor).isActive = true

    btnNL.leftAnchor.constraint(equalTo: view.centerXAnchor, constant: 7.5).isActive = true    

}

class ViewController:UIViewController{



    override func viewDidLoad() {



    super.viewDidLoad()





        self.view.addSubview(btnFR)



        self.view.addConstraint(NSLayoutConstraint(item: btnFR, attribute: .width , relatedBy: .equal, toItem: self.view, attribute: .width, multiplier: 0.9, constant: 0.0))



        self.view.addConstraint(NSLayoutConstraint(item: btnFR, attribute: .height, relatedBy: .equal, toItem: self.view, attribute: .height, multiplier: 0.7, constant: 0.0))





        self.view.addConstraint(NSLayoutConstraint(item: btnFR, attribute: .centerY, relatedBy: .equal, toItem: self.view, attribute: .centerY, multiplier: 1.0, constant: 0.0))



        self.view.addConstraint(NSLayoutConstraint(item: btnFR, attribute: .centerX, relatedBy: .equal, toItem: self.view, attribute: .centerX, multiplier: 1.0, constant: 0.0))



    }





    var btnFR : UIButton = {

        let btn = UIButton()

        btn.setTitle("", for: UIControlState.normal)

        btn.backgroundColor = UIColor.red

        btn.translatesAutoresizingMaskIntoConstraints = false

        btn.addTarget(self, action: #selector(ViewController.pressBtnFR), for: UIControlEvents.touchUpInside)

        return btn

    }()



    func pressBtnFR() {

      print("Test")

    }

}

Add the button to the Self view. It is Missing