Find which collection view cell is linked to my table view - ios

Question

I'm looking for your help for my association between a tableview and a collection view.
I've got a CollectionView with 6 horizontal scrollable cells.
In each cell, I would like to put a table view.
For each tableView, I need to know in which cell I am to put my wanted data.
Actually, I make my code work for displaying tableView inside the cells but I'm blocked for finding in which collection view cell I am.
BTW, my Meal_vc_cell controller is actually Empty, it just has a simple outlet. Nothing else.
Here is my code
class TrainFoodPlanViewController: BaseViewController, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout, UITableViewDataSource, UITableViewDelegate {
let train_meals_list: [String] = ["breakfast", "snack_1", "pre_intra_post", "lunch", "snack_2", "diner"]
#IBOutlet weak var trainCollectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Food Plan"
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
return UITableViewCell()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return train_meals_list.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collection_cell", for: indexPath) as! Meal_vc_cell
cell.meal_number.text = train_meals_list[indexPath.row]
return cell
}
}
Here is what I'm trying to do

Answer 1

There are a number of ways this can be achieved. My recommendation is to subclass UITableView and add a parentCollectionViewIndexPath property
class MyCustomTableView: UITableView {
var parentCollectionViewIndexPath: IndexPath?
}
I'm assuming Meal_vc_cell has an outlet to the relevant tableView. Change that tableView's type to MyCustomTableView
class Meal_vc_cell: UITableViewCell {
#IBOutlet weak var tableView: MyCustomTableView
}
Note: If you're using storyboard, don't forget to update the tableView's class in storyboard as well
Now, just set parentCollectionViewIndexPath in the collectionView's cellForItemAt method
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collection_cell", for: indexPath) as! Meal_vc_cell
cell.tableView.parentCollectionViewIndexPath = indexPath
return cell
}