selector for button inside collectionView cell

Question

This is driving me nuts, I've been reading SO for hours and tried everything and cant get this button selector to work. This shouldn't be difficult.

Inside CellForItemAt i have set the button tag and try call the button.

cell.deleteCellButton.tag = indexPath.item
cell.deleteCellButton.addTarget(self, action: #selector(deleteCellButtonTapped(sender:)), for: UIControlEvents.touchUpInside)

I've tried (_:), "deleteCellButtonTapped:", and any other number of parenthesis combinations and i still get unrecognised selector. i don't know why autocomplete recommends (sender:) I've never seen this before.

then my button function:

func deleteCellButtonTapped(sender: UIButton!) {
    self.packArray.remove(at: sender.tag)
        print(packArray.count)
    self.outerCollectionView.deleteItems(at: [IndexPath(item: sender.tag, section: 0)])

    self.outerCollectionView.reloadData()
    self.outerCollectionView.layoutIfNeeded()
}

Answer 1

Assuming you're using Swift 3, and func deleteCellButtonTapped(sender: UIButton!) is in the same class:

addTarget(self, action: #selector(deleteCellButtonTapped(sender:)), for: .touchUpInside)

works fine.

Answer 2

Refering the selector method from it's class works for me.

What you can do is access selector method prefixing by it's class name .

I assume your class name is MyClassViewController . And you code will look like:

class MyClassViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {

    .... // Other implementation methods

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        ....// create cell object and dequeue

        cell.deleteCellButton.addTarget(self, action: #selector(MyClassViewController.deleteCellButtonTapped(_:)), for: .touchUpInside)
        return cell
    }

    func deleteCellButtonTapped(_ sender: Any) {
         // your method implementation
          print("Selector method called")
    }
}

Hope this works fine