Implement didSelect in a collection view inside a cell - ios

Question

I am trying to perform a segue from a collection view which is inside a table view cell, the view looks like this
enter image description here
To explain it well, I have a table view, each row has a cell , inside the second row , I have a collection view which includes several products
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch indexPath.row {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "HeaderCell", for: indexPath)
return cell
case 1:
let cell = tableView.dequeueReusableCell(withIdentifier: "ItemTitle", for: indexPath)
return cell
case 2:
let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath)
return cell
case 3:
let cell = tableView.dequeueReusableCell(withIdentifier: "SectionTitle", for: indexPath)
return cell
case 4:
let cell = tableView.dequeueReusableCell(withIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
return cell
default:
let cell = tableView.dequeueReusableCell(withIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
return cell
}
}
Inside my ItemCell class I have the following
#IBOutlet weak var collectionView: UICollectionView!
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "singleItemCell", for: indexPath) as! singleItemCell
cell.itemImage.image = images[indexPath.row]
cell.itemImage.contentMode = .scaleAspectFit
return cell
}
I want to perform a segue such as when the user select a cell from the collection view, It takes him to another view controller. How can I do that ?
I tried performSegue but it does not allow me since I am in the cell class
Please any tips ?

Answer 1

In Your ItemCell class make a variable for referencing your ViewController like this:
var productVC:UIVIewController?
while loading TableView Cell set the reference to self like this:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch indexPath.row {
case 2:
let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath)
cell.productVC = self
return cell
default:
let cell = tableView.dequeueReusableCell(withIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
return cell
}
}
then implement the didSelect UICollectionView delegate method in ItemCell Class
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
productVC.performSegue(withIdentifier: "pass your segue identifier here..", sender: nil)
}

Answer 2

protocol ProductCellDelegate: class {
func didChoosedProduct(item: ItemImage)
}
class ProductCell {
#IBOutlet weak var collectionView: UICollectionView!
// Your Model Array
var itemImages: [ItemImages] = [] {
didSet {
self.collectionView.reloadData()
}
// Must set the delegate to your viewcontroller object in tableviewcell cell for rowat indexpath method
weak var delegate: ProductCellDelegate?
override func awakeFromNib() {
self.collectionView.delegate = self
}
}
extension ProductCell: UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedItem = self.itemImages[indexPath.row]
self.delegate?.didChoosedProduct(item: selectedItem)
}
}
Implement ProductCellDelegate in your viewcontroller. Call performsegue to navigation.

Answer 3

Implement UICollectionViewDataSource and UICollectionViewDelegate not in tableView cell, but in your ViewController.
You can access to collectionView in cellForRowAtIndexPath method, so you can assign it dataSource and delegate to self
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch indexPath.row {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "HeaderCell", for: indexPath)
return cell
case 1:
if let cell = tableView.dequeueReusableCell(withIdentifier: "ItemTitle", for: indexPath) as? ItemCell {
cell.collectionView?.delegate = self
cell.collectionView?.dataSource = self
return cell
}
...
}
}
And from ViewController you can make performSegue method