CODEWITHSUNDEEP
iosuiviewcontrollerswift3append
Saeed Rahmatolahi
Saeed Rahmatolahi

Reputation: 1338

Why I can't append number to my Variable?! in Swift 3

I having problem with appending or adding numbers to my Integer variable!

I have to view controllers and in the first one I have this codes:

    var checkSahafi = Int()

    if sahafi.isSelected == true {
            print("sahafi Selected")
             self.checkSahafi += 1
            performSegue(withIdentifier: "secondStep", sender: self)

        } else  if safheArayi.isSelected == true {
            print("safheArayi Selected")
            self.checkSahafi += 2
            performSegue(withIdentifier: "secondStep", sender: self)

        } else if laminet.isSelected == true {
        print("laminet Selected")
            self.checkSahafi += 3
            performSegue(withIdentifier: "secondStep", sender: self)

    } else if simpichi.isSelected == true {
        print("simpichi Selected")
            self.checkSahafi += 4
            performSegue(withIdentifier: "secondStep", sender: self)

    }

and in the second View Controller I have this method :

    let checkNum = firstViewController().checkSahafi

    override func viewDidLoad() {
          super.viewDidLoad()

    print("\(checkNum)")
    print("\(checkNum)")
    print("\(checkNum)")
    print("\(checkNum)")

    }

But The app Just Print 0 how can I append those numbers?!

Remember that I used checksahafi.append method too and didn't get the result!

Upvotes: 0

Views: 55

Answers (1)

Nirav D
Nirav D

Reputation: 72410

The issue you are getting value from completely new instance of FirstViewController what you need to do is override prepareForSegue with your controller and pass value.

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let vc = segue.destination as? SecondViewController {
        vc.checkNum = self.checkSahafi
    }
}

Now simply change the declaration of checkNum in SecondViewController like this.

var checkNum = Int()

override func viewDidLoad() {
    super.viewDidLoad()
    print("\(checkNum)")
}

Instead of calling performSegue(withIdentifier:sender:) in more than once in every if condition simply call it at last after all your if conditions

if sahafi.isSelected == true {
    print("sahafi Selected")
    self.checkSahafi += 1
}
else if safheArayi.isSelected == true {
    print("safheArayi Selected")
    self.checkSahafi += 2
}
else if laminet.isSelected == true {
    print("laminet Selected")
    self.checkSahafi += 3
} else if simpichi.isSelected == true {
    print("simpichi Selected")
    self.checkSahafi += 4
}
performSegue(withIdentifier: "secondStep", sender: self)

Upvotes: 1

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