how to call presentViewController from within a UICollectionViewCell

Question

calling this function from a UIViewController results in no problems, but calling it from a UICollectionViewCell raises a pre-compilation error

Answer 1

That's because presentViewController is a UIViewController method, UITableViewCell does not has a method called presentViewController.

what to do?

You can use Delegation pattern for handling accessing the of the button's action (as @alexburtnik answer), or -for saving some extra work- I suggest to handle the action of the cell's button in the viewController by recognizing it via tag for it.

Note: Swift 3 Code.

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! TableViewCell

        cell.myButton?.tag = indexPath.row
        cell.myButton?.addTarget(self, action: #selector(), for: .touchUpInside)

        return cell
    }

    func namesIsTapped(tappedButton: UIButton) {
        // get the user (from users array for example) by using the tag, for example:
        let currentUser = users[tappedButton.tag]

        // do whatever you want with this user now...

    }

Hope that helped.