how to push ViewController from xib tableview Cell?

Question

I have tableView within collectionView and i created using xib. I want to pushViewController when item is selected .I tried pushing the view controller in itemForRowAt method but it's not possible

class SecondTableView: UITableViewCell , UIcollectionViewDelegate ,UICollectionViewDataSource {


func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

//        let vc = DataTableViewController()
//        vc.delegate = self
//        vc.pushNav()

        let memeVC = storyboard?.instantiateViewController(withIdentifier: "MemeViewController") as! MemeViewController
        memeVC.imagePassed = image
        navigationController?.pushViewController(memeVC, animated: true)
          print("item tapped\(indexPath)")
    }
}

errors Use of unresolved identifier 'storyboard'; did you mean 'UIStoryboard'?

https://stackoverflow.com/questions/10522957/call-storyboard-scene-programmatically-without-needing-segue — Linh Quang Pham, Jul 22 '19 at 02:17

Animesh · Accepted Answer · 2019-07-22T03:11:03.503

1

Add segue as mentioned in the image and select show

Set segue identifier in your storyboard as mentioned in the image

Add below Protocol:

protocol CollectionViewCellDelegate: class {
    func userDidTap()
}

Add below property in your table view class where the collection view delegate returns.

weak var delegate: CollectionViewCellDelegate?

Update delegate method

 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
              delegate.userDidTap()
              print("item tapped\(indexPath)")
        }
    }

confirm CollectionViewCellDelegate delegate to your first view controller & add this method:

func userDidTap() {
    performSegue(withIdentifier: "showMemeViewController", sender: nil)
}

Add prepare for segue in your first VC.

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "showMemeViewController" {
            let memeVC: MemeViewController = segue.destination as! MemeViewController
            memeVC.imagePassed = image
        }
    }

Please try this let me know if you faced any other issue. Thanks.

edited Jul 22 '19 at 03:11

answered Jul 22 '19 at 02:23

Animesh

497
5
17

@user3871074, I have updated the answer please check, – Animesh Jul 22 '19 at 02:47
I can't perform the segue in UiTableViewCell class.I am looking for a way to communicate (cell -> ViewController)the class that holds tableviewCell – Sanj12 Jul 22 '19 at 02:56
1

you need to add a delegate protocol. I have updated the answer try now. – Animesh Jul 22 '19 at 03:14
Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value .When i tap on cell – Sanj12 Jul 22 '19 at 03:32
delegate.dataPassed(img[indexPath.row]) passing an image – Sanj12 Jul 22 '19 at 03:32
Glad to help you friend :) @user3871074 – Animesh Jul 22 '19 at 06:35

Abdoelrhman · Answer 2 · 2019-07-22T02:41:15.040

0

You're trying to access storyboard property in a tableview cell, which isn't there in the first place, it's a UIViewController property not a UITableViewCell property, hence the error, you'll have to delegate your selection to the viewController then let the controller do the segue normally.

You can start doing that via delegates as I mentioned above, for example if you're passing image to the controller you wanna segue to:

protocol ImageTableViewCellDelegate: class {
    // pass the the image or any variable you want in the func params
    func userDidTap(_ image: UIImage)
}

then you'd add it to the cell and confirm the controller to it

class SecondTableView {
  weak var delegate: ImageTableViewCellDelegate?
}

In your controller:

extension MyViewController: ImageTableViewCellDelegate {
    func userDidTap(_ image: UIImage){
        let memeVC = storyboard?.instantiateViewController(withIdentifier: "MemeViewController") as! MemeViewController
        memeVC.imagePassed = image
        navigationController?.pushViewController(memeVC, animated: true)
          print("item tapped\(indexPath)")
     }

}

this should work, let me know if you had any further problems

edited Jul 22 '19 at 02:41

answered Jul 22 '19 at 02:20

Abdoelrhman

906
8
17

Can you explain how should i do that – Sanj12 Jul 22 '19 at 02:34
Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) – Sanj12 Jul 22 '19 at 03:05
When are you exactly getting this? – Abdoelrhman Jul 22 '19 at 03:06
when i click on the cell – Sanj12 Jul 22 '19 at 03:07
Are you calling delegate?.userdidtap there? – Abdoelrhman Jul 22 '19 at 03:08
let controler = DataTableViewController() controler.dataPassed(img[indexPath.row]) – Sanj12 Jul 22 '19 at 03:08
That’s totally wrong, you’re creating a new instance here, please revise using delegates between views and viewcontroller to understand this more, you’re totally not understanding it – Abdoelrhman Jul 22 '19 at 03:09
what to do then .where should i call this function? – Sanj12 Jul 22 '19 at 03:11

how to push ViewController from xib tableview Cell?

2 Answers2