3D Touch doesn't in CollectionView - swift

Question

I created a soundboard and I would like when you long push on the tile (CollectionView Cell) that become a 3D Touch popup with the text of the tile.
I have a ViewCollection with the storyboard ID 'tilePreview'. And the below code, but the 3D touch doesn't.
What do I wrong? Can anybody help me?
import UIKit
import AVFoundation
class CollectionViewController: UICollectionViewController, UIViewControllerPreviewingDelegate {
#IBOutlet var soundBoard: UICollectionView!
var list = [String]()
var buttonOn: Bool = true
override func viewDidLoad() {
super.viewDidLoad()
if traitCollection.forceTouchCapability == UIForceTouchCapability.available {
registerForPreviewing(with: self, sourceView: collectionView!)
}
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> MyCollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! MyCollectionViewCell
let tileText = list[indexPath.row]
cell.cellTitle.text = tileText
return cell
}
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
Speak(currentTitle: list[indexPath.row])
}
// MARK: - Preview tile
func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
guard let indexPath = collectionView?.indexPathForItem(at: location) else { return nil }
guard let cell = collectionView?.cellForItem(at: indexPath) else { return nil }
guard let detailVC = storyboard?.instantiateViewController(withIdentifier: "tilePreview") as? DetailViewController else { return nil }
previewingContext.sourceRect = cell.frame
return detailVC
}
func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {
show(viewControllerToCommit, sender: self)
}
}

Answer 1

1) in viewDidLoad check 3D Touch is available or not
override func viewDidLoad() {
super.viewDidLoad()
//3D touch
if(traitCollection.forceTouchCapability == .available){
registerForPreviewing(with: self, sourceView: view)
}
}
2) Delegate method for 3D touch
//3D Touch delegate method
extension PostViewController : UIViewControllerPreviewingDelegate {
#available(iOS 9.0, *)
func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {
self.navigationController?.show(viewControllerToCommit, sender: self)
}
#available(iOS 9.0, *)
func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
let locationCell : CGPoint = self.collectionView.convert(location, from: self.view)
guard let indexPath = self.collectionView?.indexPathForItem(at: locationCell) else {
print(locationCell)
print("Cell Not found")
return nil
}
print("indexPath.row :: \(indexPath.row)")
guard let cell = self.collectionView?.cellForItem(at: indexPath) else { return nil }
let didSelectProduct : ProductDM = self.products[indexPath.row]
let destination: ProductDetailsViewController = UIStoryboard(storyboard: .main).instantiateViewController()
destination.selectedProduct = didSelectProduct
//destination.preferredContentSize = CGSize(width: 0.0, height: 300)
previewingContext.sourceRect = self.collectionView.convert(cell.frame, to: self.collectionView.superview)
return destination
}
}