问如何在Swift中通过UICollectionViewCell使用UILongPressGestureRecognizer？

EN

class ViewController: UIViewController, UIGestureRecognizerDelegate {

     override func viewDidLoad() {
         super.viewDidLoad()

        let lpgr = UILongPressGestureRecognizer(target: self, action: "handleLongPress:")
         lpgr.minimumPressDuration = 0.5
         lpgr.delaysTouchesBegan = true
         lpgr.delegate = self
         self.collectionView.addGestureRecognizer(lpgr)
    }

func handleLongPress(gestureReconizer: UILongPressGestureRecognizer) {
        if gestureReconizer.state != UIGestureRecognizerState.Ended {
            return
        }

        let p = gestureReconizer.locationInView(self.collectionView)
        let indexPath = self.collectionView.indexPathForItemAtPoint(p)

        if let index = indexPath {
            var cell = self.collectionView.cellForItemAtIndexPath(index)
            // do stuff with your cell, for example print the indexPath
             println(index.row)
        } else {
            println("Could not find index path")
        }
    }

func handleLongPress(_ gestureRecognizer: UILongPressGestureRecognizer) {
    if gestureRecognizer.state != UIGestureRecognizerState.ended {
      return
    }

    let p = gestureRecognizer.location(in: collectionView)
    let indexPath = collectionView.indexPathForItem(at: p)

    if let index = indexPath {
      var cell = collectionView.cellForItem(at: index)
      // do stuff with your cell, for example print the indexPath
      print(index.row)
    } else {
      print("Could not find index path")
    }
}

if gestureReconizer.state != UIGestureRecognizerState.Ended {
    return
}

if gestureRecognizer.state == UIGestureRecognizerState.Began { }