Passing variable back to parent in Swift

Question

I am re-writing a tutorial converting the code from Objective-C to swift. The app moves from VC one where there is 3 sliders (Red, Green and Blue) that set the background colour

Answer 1

It's possible that the view controller returned by ViewController() has not yet loaded its views. You could try checking this in a setter function and storing it for later use once the views have been loaded.

class VC : UIViewController {
    @IBOutlet weak var colourLabel: UILabel!
    var savedLabelText: String?

    override func viewDidLoad() {
        super.viewDidLoad()

        self.colourLabel.text = self.savedLabelText
    }

    func setColorLabelText(label: String) {
        if self.isViewLoaded() {
            self.colourLabel.text = label
        }
        else {
            self.savedLabelText = label
        }
    }
}