Print image name to console from UICollectionView - swift

Question

I'm working with a UICollectionView where I have a UIImage with a Tap Gesture Recogniser as the cell model for my CollectionView. I also have 57 images with different names that I want to print to the console depending on which image I tap on.
Here is my code:
import UIKit
class ViewController: UIViewController {
let OLLData = OLLCases()
// MARK: - Outlets
#IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
// MARK: - Navigation
#IBAction func isSelected(_ sender: Any) {
print("selected \(caseName)")
}
}
//MARK: - Data source
extension ViewController: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return OLLData.list.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PhotoCell", for: indexPath) as! PhotoCell
let image = OLLData.list[indexPath.item].image
let caseName = OLLData.list[indexPath.item].image
cell.label.text = caseName
cell.imageView.image = UIImage(named: image)
return cell
}
}
I then have another swift file (PhotoCell )where I have the IBOutlets for label and imageView.
What methods are there of doing this?
Thanks.

Answer 1

You can use UICollectionViewDelegate method to detect tap on cell but to use that first of all your UICollectionView need to confirm the delegate with your UIViewController like:
collectionView.delegate = self
in your viewDidLoad method.
then you need to replace
extension ViewController: UICollectionViewDataSource {
with
extension ViewController: UICollectionViewDataSource, UICollectionViewDelegate {
and use delegate method
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
}
and you can get selected image name with
let caseName = OLLData.list[indexPath.item].image
print(caseName)
and didSelectItemAt will look like:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let caseName = OLLData.list[indexPath.item].image
print(caseName)
}
EDIT:
Your extension will look like:
extension ViewController: UICollectionViewDataSource, UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return OLLData.list.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PhotoCell", for: indexPath) as! PhotoCell
let image = OLLData.list[indexPath.item].image
let caseName = OLLData.list[indexPath.item].image
cell.label.text = caseName
cell.imageView.image = UIImage(named: image)
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let caseName = OLLData.list[indexPath.item].image
print(caseName)
}
}

Answer 2

You should implement didSelectItemAt method, then get the cell you've selected like this:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let cell = collectionView.cellForItem(at: indexPath) as! PhotoCell
print(cell.imageView)
print(cell.label)
}
Hope this help

Answer 3

Add an extension for UICollectionViewDelegate below the last extension in your ViewController:
extension ViewController: UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print(OLLData.list[indexPath.item].image)
}
}