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iOS

Posted by Jonas Kristensen
Jonas Kristensen
2,738 Points

Making a default value when i go back

How can i make a default value everytime i go back to my FirstViewController? Ive got two viewcontrollers. The FirstViewController has four buttons, with four different values, so the Labeltext on my SecondViewController will be different for each button. But when i go back from the SecondView to the FirstView and press a new button, it will put the values together, and makes a wrong answer. I will show you the codes below, and i really hope you guys can help!

Jonas Kristensen
Jonas Kristensen
2,738 Points 
import UIKit

class ViewController: UIViewController {

    var lande = 0

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func spainBut(sender: UIButton) {
        lande = lande + 1
        performSegueWithIdentifier("sideSkift", sender: sender)
    }

    @IBAction func denmarkBut(sender: UIButton) {
        lande = lande + 2
       performSegueWithIdentifier("sideSkift", sender: sender)
            }

    @IBAction func italyBut(sender: UIButton) {
        lande = lande + 3
        performSegueWithIdentifier("sideSkift", sender: sender)
    }




    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "sideSkift" {
            let sideKontrol = segue.destinationViewController as! SecondVC

            if lande == 1 {
                sideKontrol.segueText = "Madrid"
            }
            else if lande == 2 {
                sideKontrol.segueText = "København"
            }
            else if lande == 3 {
                sideKontrol.segueText = "Rom"
            }
            else {
                sideKontrol.segueText = "Du har ikke trykket"
            }

        }

    }




}
Jonas Kristensen
Jonas Kristensen
2,738 Points 
import Foundation
import UIKit



class SecondVC: UIViewController {

    @IBOutlet var buttonLabel: UILabel!
    var segueText: String = ""


    override func viewDidLoad() {
        super.viewDidLoad()

        buttonLabel.text = segueText
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

2 Answers

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

You will have to clear the array to do what you want I think, as in re-assigning the array after you go back to the first view-controller.

Jonas Kristensen
Jonas Kristensen
2,738 Points

Can you make me an example?

Jonas Kristensen
Jonas Kristensen
2,738 Points

How do i re-assign the array after i go back to FirstView?

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

It might be something like this for the button:

@IBAction func homeBut(sender: UIButton) {
        lande = 0
       performSegueWithIdentifier("sideSkift", sender: sender)
 }

I'm not sure you would need an if statement.

Jonas Kristensen
Jonas Kristensen
2,738 Points

I see the idea. But i can't add my "Go back" button from my SecondView to Firstview when im using the navigation?