CODEWITHSUNDEEP
iosiphoneswift
FactorJose
FactorJose

Reputation: 491

Instance member '' cannot be used on type '' prepareForSegue

I've tried to understand this error before. I hope something is not initialized yet but I can't to figure out how to fix the problem.

This is wrong in prepareForSegue:

Instance member 'choice' cannot be used on type lastVC

I have the following app:

Picture

The idea is to store the option chosen in each view and send information to the lastVC throughout prepareForSegue. I have this code but it's not working just it like should.

class VC1: 

UIViewController {
    var choice : MyChoices?

    @IBOutlet weak var nextOutlet: UIButton!
    @IBOutlet weak var colourLabel: UILabel!

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

    @IBAction func redButton(sender: AnyObject) {
        nextOutlet.hidden = false
        colourLabel.text = "Red colour selected"
        choice.color = "Red"
    }

    @IBAction func blueButton(sender: AnyObject) {
        nextOutlet.hidden = false
        colourLabel.text = "Blue colour selected"
        choice.color = "Blue"
    }

    @IBAction func greenButton(sender: AnyObject) {
        nextOutlet.hidden = false
        colourLabel.text = "Green colour selected"
        choice.color = "Green"
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        let lastVC = segue.destinationViewController as! lastVC
        lastVC.choice = self.choice
    }
}

VC2 and VC3 are the same as VC1 (same outlets and buttons)

lastVC {
    var choice : MyChoices?

    @IBOutlet weak var colourLabel: UILabel!
    @IBOutlet weak var styleLabel: UILabel!
    @IBOutlet weak var sizeLabel: UILabel!

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

And the last class to store the strings

import UIKit

class MyChoices {
    var colour : String?
    var style : String?
    var size : String?
}

Upvotes: 0

Views: 1117

Answers (2)

MatthiasUttendorfer
MatthiasUttendorfer

Reputation: 11

try to init a new instance of myChoices and try to pass this to lastVC.choice

And: you should add a convenient init to your myChoices class or make a struct instead

Upvotes: 0

emresancaktar
emresancaktar

Reputation: 1567

You should check your segue identifier in prepareForSegue method before cast the lastVC. I think your prepareForSegue method tries to cast your all VCs to lastVC so it crashes every time. Try to check your segue identifier.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "YourSegueIdentifier" {
        let lastVC = segue.destinationViewController as! lastVC
        lastVC.choice = self.choice
    }
}

Upvotes: 1

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