Ios 未调用Swift-UICollectionView didSelectItemAt

当我点击卡片翻转时，我遇到了一个问题。did select函数没有被调用，因为我测试了它的打印功能，它显示它根本没有点击。是否可以提供一些帮助？

如果collectionview启用了用户交互，请检查情节提要，对于单元格也是如此。viewcontroller是否继承了

UICollectionViewDelegate

和

UICollectionViewDataSource

？检查单元格的内容视图（添加到单元格的元素）是否阻止点击手势通过，导致collectionview单元格无法识别点击手势

@IBOutlet weak var collectionView: UICollectionView!

  var model = CardModel()

  //Kepp track of the cards veiwed
  var cardArray = [Card]()

  override func viewDidLoad() {
    super.viewDidLoad()

    //Call the getCards method of the card model

    cardArray = model.getCards()

    collectionView.delegate = self
    collectionView.dataSource = self
  }

   // MARK: -UICOlecctionView Protocol Methods

  func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

    return cardArray.count
  }

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

    // Get a card CardCollectionViewCell object
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CardCell", for: indexPath) as! CardCollectionViewCell

    //Get the card that the collection view is trying to display
    let card = cardArray [indexPath.row]

    //Set the card for the cell
    cell.setCard(card)

    return cell
  }

  func collectionView( _ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
   print("Cell is taped: \(indexPath.row)")

   let cell =  collectionView.cellForItem(at: indexPath) as! CardCollectionViewCell

    // Flip the card
    cell.flip()
  }
}