How to pass data between two cells - ios

Question

After hours of googling it seems that I need a hint from society.
So the problem is:
I have two custom prototype cells. First one contains UICollectionView with 12 cells, second one contains only a label.
My task is to pass indexPath.row from that collectionView from first cell to the label from the second cell.
didSelectItemAtIndexPath: not working or I didn't tuned it properly.
Any ideas on how to implement will be very appreciated!
Here's my code (sorry for poor StackOverflow formatting)
import UIKit
class MainTableViewController: UITableViewController {
var storedOffsets = [Int: CGFloat]()
var descrLabel = UILabel()
override func viewDidLoad() {
super.viewDidLoad()
}
override func preferredStatusBarStyle() -> UIStatusBarStyle {
return .LightContent
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCellWithIdentifier("MainCell", forIndexPath: indexPath) as! MainTableViewCell
let bgImg = UIImageView(image: UIImage(named: "background"))
bgImg.contentMode = UIViewContentMode.ScaleAspectFill
cell.backgroundView = bgImg
return cell
}
else {
let cell = tableView.dequeueReusableCellWithIdentifier("DescriptionCell", forIndexPath: indexPath) as! DescriptionTableViewCell
cell.descriptionLabel.text = self.descrLabel.text
return cell
}
}
override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
guard let tableViewCell = cell as? MainTableViewCell else { return }
tableViewCell.setCollectionViewDataSourceDelegate(self, forRow: indexPath.row)
tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
}
override func tableView(tableView: UITableView, didEndDisplayingCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
guard let tableViewCell = cell as? MainTableViewCell else { return }
storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
}
}
extension MainTableViewController: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("MainCollectionViewCell", forIndexPath: indexPath) as! MainCollectionViewCell
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("Collection view at row \(collectionView.tag) selected index path \(indexPath.row)")
self.descrLabel.text = "testText"
}
}

Answer 1

I played around in playground and made this.
It's not tested, but it should give you idea.
protocol CustomDelegate{
func passData(data: AnyObject)
}
class CustomColletionView : UICollectionView, UICollectionViewDelegate{
var customDelegate : CustomDelegate!
func didSelectItemAtIndexPath(collectionView : UICollectionView, indexPath : NSIndexPath){
let cell = collectionView.cellForItemAtIndexPath(indexPath)
let someData = ""
customDelegate.passData(someData)
}
}
class ViewController: UITableViewController, CustomDelegate{
var labelCellData : AnyObject?{
didSet{
//reloadCell when data is received
tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 1, inSection: 0)], withRowAnimation: .Bottom)
}
}
func passData(data: AnyObject) {
labelCellData = data
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.registerClass(CustomTableViewCell.self, forCellReuseIdentifier:"Indetifier1")
tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "simpleCell")
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 0
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
switch indexPath.row{
case 0:
//this should contain CustomCollectionView
let cell = tableView.dequeueReusableCellWithIdentifier("Indetifier1") as! CustomTableViewCell
cell.collectionView.customDelegate = self
return cell
case 1:
let cell = tableView.dequeueReusableCellWithIdentifier("simpleCell")
cell?.textLabel?.text = labelCellData as? String
return cell!
default:
break
}
return UITableViewCell()
}
}
class CustomTableViewCell: UITableViewCell {
var collectionView : CustomColletionView!
// You need to implement it
}