DidSelect a cell in Collection View implemented in Collection View cell - ios

Question

Have an issue with collection view cell.
i've got a collection view (vertical scroll) with 2 sections (1st is ServiceCell and the 2nd is OfferCell as ). First section is with 1 item - another collection view that is set in class ServiceCell: UIcollectionViewCell {} (horizontal scroll) with multiply subcells (ServiceSubCell).
i can't understand where i have to implement didselect method for subcells
main view conroller looks like this:
extension HomeScreenViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
func numberOfSections(in collectionView: UICollectionView) -> Int {
2
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if section == 0 {
return 1
}
return offers.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: ServiceCell.reuseId, for: indexPath) as! ServiceCell
return cell
}
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: OfferCellSubCell.reuseId, for: indexPath) as! OfferCellSubCell
cell.backgroundColor = .white.withAlphaComponent(0.6)
cell.layer.cornerRadius = 20
cell.setup(with: offers[indexPath.row])
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if indexPath.section == 0 {
// this part doesn't work
let serviceVC = ServiceScreenViewController() as ServiceScreenViewController
serviceVC.category = servicesCategoriesArray[indexPath.row]
self.navigationController?.pushViewController(serviceVC, animated: true)
} else {
let offerVC = OfferScreenViewController() as OfferScreenViewController
offerVC.offerNew = offers[indexPath.row]
self.navigationController?.pushViewController(offerVC, animated: true)
}
}
}
Service cell with extension
class ServiceCell: UICollectionViewCell, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return servicesCategoriesArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: ServiceCellSubCell.reuseId, for: indexPath) as! ServiceCellSubCell
cell.setup(with: servicesCategoriesArray[indexPath.row])
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: 140, height: 140)
}
}

Answer 1

You should implement "didSelect" in ServiceCell
and you should implement in your ViewController "should highlight" for first section to "false"
func collectionView(_ collectionView: UICollectionView,
shouldHighlightItemAt indexPath: IndexPath) -> Bool {
return yourServiceSection ? false : true
}
the below code must be in ServiceCell and ViewController
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
collectionview.deselectItem(at: indexPath, animated: true)
}
in your "ServiceCell" you must add this extension:
import Foundation
import UIKit
extension ServiceCell: UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return viewModel.list.count ?? 0
}
func collectionView(_ collectionView: UICollectionView,
cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier:
ServiceSubCell.nameOfClass,
for: indexPath) as? ServiceSubCell
if let item = viewModel.data?.item(at: indexPath.item) {
cell?.config(item: item)
}
return cell ?? UICollectionViewCell()
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: SizeConstant.ServiceSubCellWidth.rawValue,
height: SizeConstant.ServiceSubCellHeight.rawValue)
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
collectionview.deselectItem(at: indexPath, animated: true)
// implement your code you need
}
}