Storing Button Pressed In Swift - swift

Question

I have collection view where you can select 4 buttons, it is like a quiz with A, B, C, D. I need to store which one they clicked before they go to the next question (They will swipe to go to the next question since it is a collection view) The controller looks like this:
First: Essentially the code used to display the image above, I have created a database which is parsed using this:
struct Question {
let fact: String
let question: String
let answers: [String: String]
let correctAnswer: String
let revenue: String
init?(with dictionary: [String: Any]) {
guard let fact = dictionary["fact"] as? String,
let question = dictionary["question"] as? String,
let answerA = dictionary["answer_a"] as? String,
let answerB = dictionary["answer_b"] as? String,
let answerC = dictionary["answer_c"] as? String,
let answerD = dictionary["answer_d"] as? String,
let revenue = dictionary["revenue"] as? String,
let correctAnswer = dictionary["correctAnswer"] as? String else { return nil }
self.fact = fact
self.question = question
self.revenue = revenue
var answersDict = [String: String]()
answersDict["answer_a"] = answerA
answersDict["answer_b"] = answerB
answersDict["answer_c"] = answerC
answersDict["answer_d"] = answerD
self.answers = answersDict
self.correctAnswer = correctAnswer
}
Second: Then I display using this code:
extension QuestionCell {
func configure(with model: Question) {
factLabel.text = model.fact
questionLabel.text = model.question
revenueLabel.text = model.revenue
let views = answersStack.arrangedSubviews
for view in views {
view.removeFromSuperview()
}
for (id, answer) in model.answers {
print(index)
print(id)
let answerLabel = UILabel()
answerLabel.text = answer
answersStack.addArrangedSubview(answerLabel)
let answerButton = UIButton()
let imageNormal = UIImage(named: "circle_empty")
answerButton.setImage(imageNormal, for: .normal)
let imageSelected = UIImage(named: "circle_filled")
answerButton.setImage(imageSelected, for: .selected)
answerButton.setTitleColor(.black, for: .normal)
answerButton.addTarget(self, action: #selector(answerPressed(_:)), for: .touchUpInside)
answersStack.addArrangedSubview(answerButton)
}
}
}
Is there a way to store the button I clicked? Thanks

Answer 1

Well there is one sure shot way out of this situation.
Make a custom cell for the collectionView.
Add button outlets and action the the customCell's class
Create and make use of delegate methods in customCell's class and when implementing the customCell in your ViewController set the delegate to
self.
Trigger the delegate methods when button actions are done (inside your custom cell).
Provide your customCell the current indexpath when using it in cellForItemAt method.
Make use of that indexPath to decide which button was triggered.
You should be thinking something close to this approach for a robust solution.

Answer 2

The way I've handled this in the past is to use the tag on a UIButton and just keep track of which tag is currently selected. With this approach I can use the same IBAction for every button and all I need to do is pull the tag from the sender in the function body. While maybe not as flexible and robust is an approach using subclassing, it's a bit quicker to implement.
First set your tags when you create your buttons (I use 100-104 to avoid conflicts with other buttons). Since you're creating your buttons in a CollectionView, you'll need to set the tag in your configure() function:
func configure(with model: Question) {
...
for (id, answer) in model.answers {
...
answerButton.setImage(imageSelected, for: .selected)
answerButton.tag = index
answerButton.setTitleColor(.black, for: .normal)
answerButton.addTarget(self, action: #selector(answerPressed(_:)), for: .touchUpInside)
}
}
Create an instance variable:
var selectedAnswerIndex = -1
Then assign this IBAction to each of you buttons:
func answerPressed(_ sender: UIButton){
selectedAnswerIndex = sender.tag
hilightNewOne(sender: sender)
}