UICollectionViewCell did select item not working - ios

Question

I have an issue with a collectionView inside a TableVieCell. When i tap on a collectionCell, didSelectItemAt doesn´t get called. I have a button in the collectionCell so i tried to disable the user interaction and enable the contentView userInteraction but it didn't work.
The red rectangle is the tableCell and the blue rectangle is the collecionView insede the table view cell
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "MedCellWithCollection") as? MedCellWithCollection{
let backgroundView = UIView()
backgroundView.backgroundColor = UIColor.white.withAlphaComponent(0.0)
cell.selectedBackgroundView = backgroundView
cell.setMedName(name: self.medCatalog[indexPath.row].nombre, uso: self.medCatalog[indexPath.row].uso , array: self.medCatalog[indexPath.row].enfermedades[0].aplicaciones , index: indexPath.row)
cell.layoutIfNeeded()
cell.layoutSubviews()
cell.setNeedsUpdateConstraints()
cell.updateConstraintsIfNeeded()
return cell
}
}
return UITableViewCell()
}
The tableCell
class MedCellWithCollection: UITableViewCell {
//Outlets
#IBOutlet weak var medText: UILabel!
#IBOutlet weak var uso: UILabel!
#IBOutlet weak var arrowIcon: UIImageView!
#IBOutlet weak var CollectionView: UICollectionView!
//Variables
var dosesType:[Aplicacion]?
override func awakeFromNib() {
super.awakeFromNib()
self.collectionViewSetUp()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func setMedName(name: String, uso: String, array: [Aplicacion], index: Int){
self.medText.text = name
self.uso.text = uso
self.dosesType = array
self.CollectionView.reloadData()
}
}
extension MedCellWithCollection: UICollectionViewDataSource, UICollectionViewDelegate{
func collectionViewSetUp(){
self.CollectionView.delegate = self
self.CollectionView.dataSource = self
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.dosesType?.count ?? 0
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "doseColletion", for: indexPath as IndexPath) as? DoseCollection {
cell.setButtonConfig(doseType: self.dosesType![indexPath.row].metodo , index: indexPath.row)
return cell
}
return UICollectionViewCell()
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("tapped")
}
}
CollectionCell
import UIKit
class DoseCollection: UICollectionViewCell {
//Outlets
#IBOutlet weak var Button: Button!
//Variables
let constants = Constants()
func setButtonConfig(doseType: String, index: Int){
self.Button.titleLabel?.text = doseType
self.Button.backgroundColor = constants.COLOR_ARRAY[index]
}
override func layoutSubviews() {
super.layoutSubviews()
}
override func layoutIfNeeded() {
super.layoutIfNeeded()
}
}

Answer 1

Potential Solutions:
1) Should be Single Selection for tableView selection property, programmatically it can be done by tableView.allowsSelection = true
2) The class is not the UITableViewDelegate for that table view, though UITableViewController is supposed to set that automatically.
tableView?.delegate = self
3) If the problem arise with UITapGestureRecognizer:
let tap = UITapGestureRecognizer(target: self, action:Selector("dismissKeyboard"))
view.addGestureRecognizer(tap)
tap.cancelsTouchesInView = false
BOL :)

Answer 2

In my case, I want to change the background of the button in other words the background of the cell in the collection view:
class CustomCVCell: UICollectionViewCell {
override var isSelected: Bool {
didSet {
grayBackgroundViewWithImage.image =
isSelected ? UIImage(named: "") : UIImage()
}
}
In the main class where the collection view is stored create this variable:
class CustomViewController: UIViewController {
///save the indexPath of last selected cell
private var lastSelectedIndexPath: IndexPath? }
In viewDidLoad() set this value to false:
customCollectionView.allowsMultipleSelection = false
Further code in data source. In my case, the first cell should be is selected:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CustomCVCell.cellID(),
for: indexPath) as! CustomCVCell
if indexPath.row == 0 {
lastSelectedIndexPath = indexPath
cell.isSelected = true
}
//update last select state from lastSelectedIndexPath
cell.isSelected = (lastSelectedIndexPath == indexPath)
return cell
}
Further code in the delegate:
///UICollectionViewDelegate
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
guard lastSelectedIndexPath != indexPath else { return }
if let index = lastSelectedIndexPath {
let cell = collectionView.cellForItem(at: index) as! CustomCVCell
cell.isSelected = false
}
let cell = collectionView.cellForItem(at: indexPath) as! CustomCVCell
cell.isSelected = true
lastSelectedIndexPath = indexPath
}