没有在viewController上调用协议

Question

目前，我们有一个在＆＃34; didSelectItemAt indexPath＆＃34;它位于collectionViewCell上。它是这样做的，以便将collectionViewCell嵌入tableViewCell中，以便它可以侧滚动。当按下collectionViewCell时，它应该转到另一个视图控制器。截至目前，从未调用过与该协议相关联的单元的viewController。这是代码：

protocol handleKnownForImage {
  func knownForImageTapped(movieID: NSNumber)
}

//On TableViewCell
class KnownForCell : UITableViewCell {
  var imageDelegete: handleKnownForImage?
  var movieID: NSNumber?
}

extension KnownForCell: UICollectionViewDataSource {

  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    print("Known For Cell Has Been Pressed")

    self.movieID = knownForExtendedArray[indexPath.row].id 
    guard let movieID = movieID else {return}
    imageDelegete?.knownForImageTapped(movieID: movieID)//This gets called
  }
}

//On ViewController
extension PeopleDetailViewController: handleKnownForImage {

  var knownForID: NSNumber?

  func knownForImageTapped(movieID: NSNumber) {//This is never called
    self.knownForID = movieID
    performSegue(withIdentifier: peopleToDetailSegue, sender: self)
  } 
}