UICollectionView didSelectItemAt not being called

Question

I am puzzled because It is just a simple thing but doesn't work.

This is my checked list before write question at here.

1. UICollectionViewDelegate is registered

2. There is nothing on above than UICollectionView from "Debug View Hierarchy"

3. isUserInteractionEnabled of UICollectionView and UICollectionViewCell is true

4. isAllowsSelection of UICollectionView is true

Is there anything else I should check out?

=====

class MyView: NibDesignable { // It's UIView with NibDesignableProtocol (https://github.com/mbogh/NibDesignable)
    @IBOutlet weak var collectionView: UICollectionView!

    override init(frame: CGRect) {
        super.init(frame: frame)

        self.setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        self.setup()
    }

    private func setup() {
        print("test - It's called.")

        self.collectionView.dataSource = self
        self.collectionView.delegate = self
        self.collectionView.isUserInteractionEnabled = true
        self.collectionView.isAllowsSelection = true
    }
}

extension MyView: UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath {
        print("test - It's not called")
    }
}

I pasted only the part relating to question because all of code is too long.

Answer 1

This can happen if you have a gestureRecognizer in your custom cell. this will override the didSelectItemAt delegate of the collectionView.

If this is your issue, then you can resolve it by identifying the gestureRecognizer and doing the following:

let tap = UITapGestureRecognizer(target: self, action: #selector(self.someViewInMyCellTapped(_:)))
someViewInMyCell.addGestureRecognizer(tap)

tap.cancelsTouchesInView = false

Answer 2

I changed the isUserInteractionEnabled property of the subviews of Cell to false. and it works.