Selected UICollectionViewCell and performing a segue - swift

Question

Wanting to store a users selected collection cell title as a local variable, so then it can be passed along to the next view using a segue. I'm having trouble with the didSelectItemAt function, even if I put a print statement there, nothing happens when a cell is selected.
GoalsViewController
import Foundation
import UIKit
class GoalsViewController: UIViewController {
#IBOutlet weak var collectionView: UICollectionView!
var selectedGoal: String = ""
var goalArray = ["Goal 1", "Goal 2"]
var imageArray = ["1", "2"]
override func viewDidLoad() {
super.viewDidLoad()
collectionView.dataSource = self
collectionView.delegate = self
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToGoalDetail" {
let secondVC = segue.destination as! GoalDetailViewController
secondVC.goalSelectedOnHome = selectedGoal
}
}
}
extension GoalsViewController: UICollectionViewDataSource, UICollectionViewDelegate {
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return goalArray.count
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
selectedGoal = goalArray[indexPath.row]
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GoalCell", for: indexPath) as! GoalsCollectionViewCell
cell.goalTitleLabel.text = goalArray[indexPath.row]
cell.backgroundColor = UIColor.darkGray
cell.featuredImageView.image = UIImage(named: "\(imageArray[indexPath.row])")
return cell
}
}
GoalsCollectionViewCell
import UIKit
class GoalsCollectionViewCell: UICollectionViewCell {
#IBOutlet weak var featuredImageView: UIImageView!
#IBOutlet weak var goalTitleLabel: UILabel!
#IBOutlet weak var backgroundColorView: UIView!
}
GoalsDetailViewController
import UIKit
class GoalDetailViewController: UIViewController {
#IBOutlet weak var closeButtonImage: UIImageView!
#IBOutlet weak var goalDetailTitle: UILabel!
#IBOutlet weak var closeButton: UIButton!
var goalSelectedOnHome = ""
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
goalDetailTitle.text = goalSelectedOnHome
closeButton.setImage(UIImage(named: "closeIcon"), for: .normal)
closeButton.addTarget(self, action: #selector(closeButtonTapped), for: .touchUpInside)
}
#objc func closeButtonTapped(sender:UIButton!) {
self.dismiss(animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}