How to transition to a new controller when clicking on UICollectionViewCell (programatically) - ios

Question

I have set up a ViewController with UICollectionViewCells, inside of a navigation controller. I want to be able to click on the cells and then have the user be taken to a new controller depending on which cell is selected (different controller for each cell). I want the navigation bar to still appear in the new controller, and have a back button that will take the user back to the original ViewController. I have the following code inside the initial view controller to set up the collection view cells:
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: playlistCellId, for: indexPath) as! playlistCoverCell
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: 100, height: 100)
}
I also register the cells correctly in viewDidLoad. What function do I use to perform an action when selecting a cell?

Answer 1

you have to use:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if indexPath.row == 0 {
let viewController = UIViewController() // or your custom view controller
self.navigationController?.pushViewController(viewController, animated: true)
}
else if indexPath.row == 1 {
// and so on....
}
}
Tells the delegate that the item at the specified index path was
selected. The collection view calls this method when the user
successfully selects an item in the collection view. It does not call
this method when you programmatically set the selection.

Answer 2

you can try UICollectionViewDelegate in the function
enter image description here
you can use indexPath to get elements of the current click;
push to next viewController you have to have navigationViewController, if navigationController is nil, you can try protocol or block. Sorry, my English is not good, maybe grammar is wrong.