Button state info - ios

Question

The question is similar to "how to pass data from different viewController" but in this case I need another information, I know how to pass the data from one viewController to another but I don't know how to tell to the second viewController a specific state of an object that is in the first view. In my case I have some buttons in the first view that go in.
button.isHidden = true
after the tap, I want to tell to the second viewController which buttons have been tap, maybe I've to create a variable that represents the status of the button, but I don't know how to do, someone can help me?
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToLast" {
guard let vc = segue.destination as? FinalClass else { return }
let guest = segue.destination as! FinalClass
if let user = sender as? User {
}
}
}
where User can be something like
struct User {
var button1 = Button1 tapped
var button2 = Button2 tapped
ecc.
}

Answer 1

Let suppose you have two viewControllers - FirstViewController and SecondViewController.
So First,
Let Declare two Arrays in FirstViewController and SecondViewController something like -
var tappedButtonsArray = NSMutableArray() // In 'FirstViewController'
AND
var previousViewTappedButtonsArray = NSMutableArray() // In 'SecondViewController'
And here is my code to add | remove tapped buttons to | from tappedButtonsArray in FirstViewController -
#IBAction func btnTapped(_ sender: UIButton) { // Single action for all buttons
if (tappedButtonsArray.contains(sender)){
tappedButtonsArray.remove(sender) // Remove previous tapped button on unselect
}
else{
tappedButtonsArray.add(sender) // Add tapped button on select
}
}
And Here is your perform segue method:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToLast" {
guard let secondViewController = segue.destination as? SecondViewController else { return }
secondViewController.previousViewTappedButtonsArray = tappedButtonsArray
}
}
I've done with a simple array concept without any model, so that you can understand the follow. I hope it'll help you to start with.