Button in custom UICollectionViewCell class does not taking action - swift

Question

Hi I am developing a route finder application, and inside the application when user searches for specific places, app provides number of places on both map and in UICollectionView which contains short description of list of places found and a "Go" UIButton to show the direction. However, despite the fact that button is shown on the cell and is touchable, meaning isUserInteractionEnabled is true, button is not triggering an action. "Pressed" is not shown on console. (Note: Screen shot is available for demonstration purposes.)
Declaration of the UICollectionView in MapViewController.
let collectionViewOfListOfPlaces:UICollectionView = {
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.translatesAutoresizingMaskIntoConstraints = false
cv.register(CustomCell.self, forCellWithReuseIdentifier: "cell")
return cv
}()
In viewDidLoad function of MapViewController this lines are added.
collectionViewOfListOfPlaces.reloadData()
collectionViewOfListOfPlaces.delegate = self
In extension of MapViewController this lines functions are added.
func setupCollectionViewOfListOfPlaces(){
hideListViewButton.translatesAutoresizingMaskIntoConstraints = false
hideListViewButton.isUserInteractionEnabled = true
collectionViewOfListOfPlaces.backgroundColor = UIColor.white.withAlphaComponent(0)
collectionViewOfListOfPlaces.topAnchor.constraint(equalTo: listContentView.topAnchor, constant: 0).isActive = true
collectionViewOfListOfPlaces.leadingAnchor.constraint(equalTo: listContentView.leadingAnchor, constant: 10).isActive = true
collectionViewOfListOfPlaces.trailingAnchor.constraint(equalTo: listContentView.trailingAnchor, constant: -10).isActive = true
collectionViewOfListOfPlaces.heightAnchor.constraint(equalToConstant: view.frame.height/5).isActive = true // ?
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionViewOfListOfPlaces.frame.height/0.8, height: collectionViewOfListOfPlaces.frame.height/1.2)
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return landmarks.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionViewOfListOfPlaces.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
let cellData = self.landmarks[indexPath.item]
cell.backgroundColor = Colors.violet3
cell.setData(dataa: cellData) //????????
cell.delegate = self
return cell
}
Custom class:
import Foundation
import UIKit
protocol CustomCellDelegate {
func didPrintNameOfPlace(placeName: String)
}
class CustomCell: UICollectionViewCell {
// var data: Landmark? {
// didSet {
// guard let data = data else { return }
//
// }
// }
let directButton: UIButton = {
let button = UIButton(type: .system)
button.setTitle("Go", for: .normal)
button.titleLabel?.font = .systemFont(ofSize: 18)
button.addTarget(
self,
action: #selector(directButtonPressed),
for: UIControl.Event.touchUpInside)
button.backgroundColor = .white
return button
}()
var data: Landmark?
var delegate: CustomCellDelegate?
override init(frame: CGRect) {
super.init(frame: .zero)
setUpDirectButton()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setData(dataa: Landmark){
data = dataa
}
func setUpDirectButton(){
contentView.addSubview(directButton)
directButton.translatesAutoresizingMaskIntoConstraints = false
directButton.isUserInteractionEnabled = true
directButton.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 0).isActive = true
directButton.rightAnchor.constraint(equalTo: contentView.rightAnchor, constant: 0).isActive = true
directButton.widthAnchor.constraint(equalToConstant: 50).isActive = true
directButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
directButton.frame.size.width = 50
directButton.frame.size.height = 50
}
#objc func directButtonPressed(sender: UIButton!) {
// delegate?.didPrintNameOfPlace(placeName: data!.nameOfPlace)
print("Pressed")
}
}
```[Screen shot link][1]
[1]: https://i.stack.imgur.com/azHSd.jpg

Answer 1

Mark your button initialise with lazy
private lazy var directButton: UIButton = {
let button = UIButton(type: .system)
button.setTitle("Go", for: .normal)
button.titleLabel?.font = .systemFont(ofSize: 18)
button.addTarget(
self,
action: #selector(directButtonPressed),
for: UIControl.Event.touchUpInside)
button.backgroundColor = .white
return button
}()

Answer 2

Cut this line:
button.addTarget(
self,
action: #selector(directButtonPressed),
for: UIControl.Event.touchUpInside)
...and paste it inside setupDirectButton. Your button will start working.