how to pass data from cell to another ViewController

Question

@TusharMordiya Please check this image I have created a tableView inside a CollectionView.The contents of the view are UIImage and a UILabel.I want to design the cell in which when I click on a cell the image and label must go to another ViewController.

import UIKit

class ExploreTableViewCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout{

   @IBOutlet var collectionView: UICollectionView!

   var namearr = ["images-1", "images-2", "images-3", "images-4", "images-5"]

   override func awakeFromNib() {
      super.awakeFromNib()
    
      collectionView.delegate = self
      collectionView.dataSource = self

   }
   override func setSelected(_ selected: Bool, animated: Bool) {
      super.setSelected(selected, animated: animated)

   }

   func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
      return 10
   }



   func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
      let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
      return cell
   }

   func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
      return CGSize(width: 132, height: 134)
   }


   func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    
      let vc = UIStoryboard(name: "DetailViewController", bundle: nil).instantiateViewController(withIdentifier:"DetailViewController") as? DetailViewController
    
      vc?.name = namearr[indexPath.row]
      vc?.img.image = UIImage(named: namearr[indexPath.row])
      //self.navigationController?.pushViewController(vc, animated: true)
    
      // showing error in here and while declaring object of viewcontroller
   }
}

Answer 1

Please try this.

1. Add function for get top most view controller

   extension UIApplication {
   
        class func topViewController(_ viewController: UIViewController? = UIApplication.shared.connectedScenes
                                .filter({$0.activationState == .foregroundActive})
                                .compactMap({$0 as? UIWindowScene})
                                .first?.windows
                                .filter({$0.isKeyWindow}).first?.rootViewController) -> UIViewController? {
            if let nav = viewController as? UINavigationController {
                return topViewController(nav.visibleViewController)
            }
            if let tab = viewController as? UITabBarController {
                if let selected = tab.selectedViewController {
                    return topViewController(selected)
                }
            }
            if let presented = viewController?.presentedViewController {
                return topViewController(presented)
            }
            return viewController
        }
    }
   

2. Use this code in your didSelectItemAt method

   func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
   
       let storyBoard = UIStoryboard(name: "Main", bundle: nil)
       if let vc = storyBoard.instantiateViewController(withIdentifier:"DetailViewController") as? DetailViewController {
   
         vc.name = namearr[indexPath.row]
         print("You tapped the cell\(indexPath) with car name \(namearr[indexPath.row]) ")
         UIApplication.topViewController()?.navigationController?.pushViewController(vc, animated: true)
       }
   }
   

3. In your Detail Screen

   class DetailViewController: UIViewController {
   
      @IBOutlet var lbl: UILabel!
      @IBOutlet var img: UIImageView!
   
      var name = ""
   
   
      override func viewDidLoad() {
          super.viewDidLoad()
          lbl.text = name
          img.image = UIImage(named: name)
   
      }
   }