Collection View inside table view delegate - swift

Question

I have a table view with collection view inside table rows.
structure is next:
MainViewController.swift:
class MainViewController: UIViewController {
#IBOutlet weak var customTable: UITableView!
func callSegue() {
performSegue(withIdentifier: "customSegue", sender: self)
}
override func viewDidLoad() {
customTable(UINib(nibName: "CustomTableCell", bundle: nil), forCellReuseIdentifier: "TipsTableCell")
}
}
extension MainViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomTableCell", for: indexPath) as! CustomTableCell
//Fill cell with my data
return cell
}
}
CustomTableCell.swift
class CustomTableCell.swift: UITableViewCell {
#IBOutlet var collectionView: UICollectionView!
override func awakeFromNib() {
super.awakeFromNib()
self.collectionView.dataSource = self
self.collectionView.delegate = self
self.collectionView.register(UINib.init(nibName: "CustomTableCell", bundle: nil), forCellWithReuseIdentifier: "CustomTableCell")
}
}
extension CustomTableCell: UICollectionViewDataSource, UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dataArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CustomTableCell", for: indexPath) as! CustomTableCell
cell.label1.text = dataArray[indexPath.item]
return cell
and my CustomCollectionvCell.swift
class CustomCollectionvCell: UICollectionViewCell {
#IBOutlet weak var label1: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
I need something like this:
I need to call "callSegue" func in MainViewController when I tapped at cell where label1.text == "Something".

Answer 1

Use closures to solve that.
Add a closure in CustomTableCell and call it when the collectionViewCell is tapped in collectionView(_:didSelectItemAt:) method, i.e.
class CustomTableCell: UITableViewCell {
var handler: (()->())?
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.handler?()
}
}
In MainViewController, set the closure while dequeuing CustomTableCell in tableView(_:cellForRowAt:) method, i.e.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomTableCell", for: indexPath) as! CustomTableCell
cell.handler = {[weak self] in
self.callSegue() //here.....
}
return cell
}
Also cross-check if you have a segue with identifier customSegue in your storyboard.

Answer 2

In your case, you have to implement delegate from CustomTableCell.swift and use in MainViewController.swift
// MainViewController.swift:
class MainViewController: UIViewController {
#IBOutlet weak var customTable: UITableView!
func callSegue() {
performSegue(withIdentifier: "customSegue", sender: self)
}
override func viewDidLoad() {
customTable(UINib(nibName: "CustomTableCell", bundle: nil), forCellReuseIdentifier: "TipsTableCell")
}
}
extension MainViewController: UITableViewDataSource, collectionViewCellTapped {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomTableCell", for: indexPath) as! CustomTableCell
//Fill cell with my data
return cell
}
func cellTapped(_ text: String) {
if let text = dataArray[indexPath.item], text == "Something" {
callSegue()
}
}
}
// CustomTableCell.swift
protocol collectionViewCellTapped {
func cellTapped(_ text: String)
}
class CustomTableCell : UITableViewCell {
#IBOutlet var collectionView: UICollectionView!
var delegate: collectionViewCellTapped!
override func awakeFromNib() {
super.awakeFromNib()
self.collectionView.dataSource = self
self.collectionView.delegate = self
self.collectionView.register(UINib.init(nibName: "CustomTableCell", bundle: nil), forCellWithReuseIdentifier: "CustomTableCell")
}
}
extension CustomTableCell: UICollectionViewDataSource, UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dataArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CustomTableCell", for: indexPath) as! CustomTableCell
cell.label1.text = dataArray[indexPath.item]
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if let delegate = self.delegate {
delegate.cellTapped(text)
}
}
}