does not have a reuseIdentifier - cells must be retrieved by calling -dequeueReusableCellWithReuseIdentifier:forIndexPath swift

 Problem:

While run the collectionview with headers it shows the below error

does not have a reuseIdentifier - cells must be retrieved by calling -dequeueReusableCellWithReuseIdentifier:forIndexPath

    func configCell(message: String, atIndex: IndexPath) -> UICollectionViewCell {

        return UICollectionViewCell()

    }

Solution:

Because it have no cell.That's why it shows exception

    func configCell(message: String, atIndex: IndexPath) -> UICollectionViewCell {

        guard let cell = self.CollView.dequeueReusableCell(withReuseIdentifier: NewCell.identifier, for: atIndex) as? NewCell else {

            return UICollectionViewCell()

        }

        return cell

    }