CODEWITHSUNDEEP
iosswiftuitableviewuicollectionviewsegue
Carl Andreas Julsvoll
Carl Andreas Julsvoll

Reputation: 39

Segue programatically from custom tableView inside collectionView

I have two classes:

class FeedAndGroupsViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {}

class eventsCustomCollectionCell: UICollectionViewCell, UITableViewDataSource, UITableViewDelegate {}

... where the collectionView class creates a UITableView.

I am trying to create a custom segue when the tableViewCell is clicked. I have implemented the tableView(didSelectRowAt) function for tableView which works fine. However, I am not able to call performSegue from this function. Anyone know how to solve this?

Upvotes: 0

Views: 344

Answers (2)

chuninator
chuninator

Reputation: 63

This had me spinning my wheels for some time. In my case, I have a UITableViewCell with a UICollectionView inside of it. The table view cell is holding the array of items. I wasn't able to access those items inside of the ViewController for the specified index. Also, not using storyboards, so rather than performSegue(withIdentifier: "Your segue identifier", sender: object) I used self.navigationController?.pushViewController(detailVC, animated: true)

Here's what ended up working for me. I had to actually pass the object in the protocol function. 

protocol NearbyTableViewCellDelegate : class{
    func didClick(cell: EatsItemNearbyTableCell, eat: Eats)
}


 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let eat = nearByEats[indexPath.row]
        delegate?.didClick(cell: self, eat: eat)
    }

In the ViewController: 

extension EatsItemDetailVC: NearbyTableViewCellDelegate {
    func didClick(cell: EatsItemNearbyTableCell, eat: Eats) {
        let detailVC = EatsItemDetailVC()
        detailVC.eat = eat
        detailVC.currentLocation = currentLocation
        self.navigationController?.pushViewController(detailVC, animated: true)
    }
}

Upvotes: 0

nishith Singh
nishith Singh

Reputation: 2998

This is because your class eventsCustomCollectionCell is a UICollectionViewCell subclass not a UIViewController subclass. 

func performSegue(withIdentifier identifier: String, sender: Any?)

is a method that is available in UIViewController. So for the solution you can create a protocol in eventsCustomCollectionCell which can have a method 

func cellClicked(cell: eventsCustomCollectionCell)

and your FeedAndGroupsViewController can implement this protocol and can call performSegue.

I have written skeleton code for your use case you can refer to this code and get started.

class EventsCustomCollectionCell: UICollectionViewCell,UITableViewDelegate{
    weak var delegate : EventsCustomCollectionCellDelegate?
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        delegate?.didClick(cell: self)
    }
}

protocol EventsCustomCollectionCellDelegate : class{
    func didClick(cell:EventsCustomCollectionCell)
}

class FeedAndGroupsViewController: UIViewController,EventsCustomCollectionCellDelegate,UICollectionViewDataSource{
var collectionView : UICollectionView!
var yourArrayForCollectionView = [String]()

func didClick(cell:EventsCustomCollectionCell){
    if let index = collectionView.indexPath(for:cell){
        let object = yourArrayForCollectionView[index.row]
        performSegue(withIdentifier: "Your segue identifier", sender: object)
    }
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell{
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Your cell reuse id", for: indexPath) as! EventsCustomCollectionCell
    cell.delegate = self
    return cell
}

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

Hope this helps.

Upvotes: 3

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