How to access variables which located in another class - ios

Question

I'm trying to access a var which located in another class(ViewController), but I cannot access answeredCorrectly variable in LastView class. How can I access it and when I call answeredCorrectly like that(marked with 1) is it going to use the default instance of ViewController?
I tried that(LastView.swift)
import Foundation
import UIKit
class LastView: ViewController {
#IBOutlet weak var numberLabel: UILabel!
func assignLabelToCount(){
numberLabel.text = "\(answeredCorrectly)"
}
}
Whole View Controller
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var questionLabel: UILabel!
#IBOutlet weak var answerBox: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
answerBox.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
var questionShowing = ""
var answerForControl = 0
#IBAction func newButton() {
var question = getQuestion()
questionShowing = question.0
answerForControl = question.1
questionLabel.text = questionShowing
var timer = NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: Selector("endGame"), userInfo: nil, repeats: false)
print()
}
func print(){
println("\(questionShowing) >>>>>> \(answerForControl)")
}
var answeredCorrectly = 0
func textFieldDidChange(textField: UITextField) {
var answerInInt = String(stringInterpolationSegment: answerForControl)
var answer: String? = String(answerInInt)
if answerBox.text == answer {
newButton()
answeredCorrectly++
answerBox.text = ""
} else {
}
}
func endGame(){
println("Count of correct answers: \(answeredCorrectly)")
answeredCorrectly = 0
LastView().assignLabelToCount()
performSegueWithIdentifier("toEnd", sender: nil)
}
func getQuestion() -> (String, Int){...}
}

Answer 1

There are a couple of things you could do, if you want to utilize inheritance, go ahead and try this kind of structure:
class ViewController : UIViewController {
//the var you want to access
var answeredCorrectly: Int = ViewController().answeredCorrectly
//your other code
//....
}
then, inherit the class, since your class LastView inherits ViewController, any class that inherits ViewController will now have access to UIViewController.
Note
If you haven't changed the subclass of your ViewController, it should be UIViewController by default.
let's inherit the class for your LastView class:
class LastView : ViewController {
//now your LastView class inherits from ViewController, which also inherits
//from UIViewController, it's like a big chain of classes
#IBOutlet weak var numberLabel: UILabel!
func assignLabelToCount() {
numberLabel.text = "\(answeredCorrectly)"
}
}
The function just simply assigns your variable answeredCorrectly, which is located in ViewController.

Answer 2

declare variable numberLabel as public

Answer 3

You need to create instance of that class to access the variable.
Ex:
var lastViewInstance: LastView = LastView() // Declare in the class in which you want to access the variable
lastViewInstance.numberLabel.text = "Access from Another class"
This is how you can access any variable or outlet!

Answer 4

You can store your object into disk by using NSUserDefaults and you can use it this way:
Store your object to NSUserDefaults:
NSUserDefaults.standardUserDefaults().setObject("YouObjectValue", forKey: "YourKey")
After that you can access it anywhere into your project this way:
let yourVar: AnyObject? = NSUserDefaults.standardUserDefaults().objectForKey("YourKey")
Hope it will help you.