Collection View inside Table View Cell - ios

Question

I want to create collection view inside the table view cell for horizontal scrolling of elements. But I have the problem how to fill right my collection views. I need a way to connect collection views with my data.
How can I get and loop through Table View Cells to find needed collection view and return the cells with data?

Answer 1

below is a general example of how you can pass data to collection views inside your table view cell. Also this link is a youtube tutorial on this subject.
Models:
class ListOfParents: NSObject {
var parents:[Parent]?
}
class Parent: NSObject {
var children: [Child]?
static func fetchParents(_ completionHandler: #escaping (ListOfParents) -> ()) {
//fetch parents data
}
}
class Child: NSObject {
}
TableView cell:
class CustomTableViewController: UITableViewController {
var listOfParents: ListOfParents?
override func viewDidLoad() {
super.viewDidLoad()
Parent.fetchparents { (listOfParents) in
self.listOfParents = listOfParents
}
tableView.register(CustomParentCell.self, forCellReuseIdentifier: "tableCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
guard let parentsCount = listOfParents?.parents?.count else {return 0}
return parentsCount
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell", for: indexPath) as! CustomParentCell
cell.parent = listOfParents?.parents?[indexPath.item]
return cell
}
}
Parent cell:
class CustomParentCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {
var parent: Parent? {
didSet {
// set child value here
}
}
lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
return collectionView
}()
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
collectionView.delegate = self
collectionView.dataSource = self
collectionView.register(CustomChildCell.self, forCellWithReuseIdentifier: "childCellID")
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
guard let childrenCount = parent?.children?.count else {return 0}
return childrenCount
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "childCellID", for: indexPath) as! CustomChildCell
cell.child = parent?.children?[indexPath.item]
return cell
}
}
Child cell:
class CustomChildCell: UICollectionViewCell {
var child: Child?
}