How Can I Pass the Value of A Textfield to a Button Clicked Function in Swift?

Question

I need to preform username and login checks upon pressing the login button. I need to do all of this without storyboards. However, my problem is that when I create a button that connects to a function, the textfields are then out of scope.

override func viewDidLoad() { super.viewDidLoad()

        let Login = UIButton()
        makeButton(Login, name: "Login", location: CGRectMake((screenSize.width-120)/2, 5*screenSize.width/6, 120, 30))
        Login.addTarget(self, action: "loginChecks", forControlEvents: .TouchUpInside)


        // Makes Text Fields
        let usernameField: UITextField = UITextField()
        makeTextField(usernameField, frame: CGRectMake((screenSize.width-300)/2 + 300, 175, 300, 35))

        let passwordField: UITextField = UITextField()
        makeTextField(passwordField, frame: CGRectMake((screenSize.width-300)/2 + 300, 350, 300, 35))

        // Makes Text Labels
        let usernameLabel: UILabel = UILabel()
        makeLabel(usernameLabel, name: "Username", frame: CGRectMake((screenSize.width-300)/2 - 300, 175, 300, 55))

        let passwordLabel: UILabel = UILabel()
        makeLabel(passwordLabel, name: "Password", frame: CGRectMake((screenSize.width-300)/2 - 300, 350, 300, 55))

        self.configureView()

    }

** This is a separate function outside ViewDidLoad **

func loginChecks(){
            // Checks login logic

both inputtedPassword and inputtedUsername appear to be outside of scope

            var inputtedPassword = passwordField.text
            var inputtedUsername = usernameField.text
            print(inputtedUsername)
            print(inputtedPassword)

            if (inputtedUsername == ""){
                makeAlert("No Username", message: "Please input a username.", printStatement: "No username")
                return
            } else if(inputtedPassword == ""){
                makeAlert("No Password", message: "Please input a password.", printStatement: "No password")
                return
            } else {

            }

        }

score 2 · Accepted Answer · answered Dec 29 '15 at 00:41

You should declare usernameField and passwordField as properties in your class, that way you can access them from multiple methods. E.g.:

class ViewController: UIViewController {

let usernameField: UITextField = UITextField()
let passwordField: UITextField = UITextField()

override func viewDidLoad() {
    super.viewDidLoad()

    let Login = UIButton()
    makeButton(Login, name: "Login", location: CGRectMake((screenSize.width-120)/2, 5*screenSize.width/6, 120, 30))
    Login.addTarget(self, action: "loginChecks", forControlEvents: .TouchUpInside)


    // Makes Text Fields
    makeTextField(usernameField, frame: CGRectMake((screenSize.width-300)/2 + 300, 175, 300, 35))

    makeTextField(passwordField, frame: CGRectMake((screenSize.width-300)/2 + 300, 350, 300, 35))

    // Makes Text Labels
    let usernameLabel: UILabel = UILabel()
    makeLabel(usernameLabel, name: "Username", frame: CGRectMake((screenSize.width-300)/2 - 300, 175, 300, 55))

    let passwordLabel: UILabel = UILabel()
    makeLabel(passwordLabel, name: "Password", frame: CGRectMake((screenSize.width-300)/2 - 300, 350, 300, 55))

    self.configureView()
}

func loginChecks(){
    // Checks login logic
    var inputtedPassword = passwordField.text
    var inputtedUsername = usernameField.text
    print(inputtedUsername)
    print(inputtedPassword)

    if (inputtedUsername == ""){
        makeAlert("No Username", message: "Please input a username.", printStatement: "No username")
        return
    } else if(inputtedPassword == ""){
        makeAlert("No Password", message: "Please input a password.", printStatement: "No password")
        return
    } else {

    }
}

}

How Can I Pass the Value of A Textfield to a Button Clicked Function in Swift?

1 Answers1