CollectionViewをドラッグアンドドロップするためにUILongPressGestureRecognizerを設定したがロングプレスしても反応がない

カスタムセルをのコレクションビューをドラッグアンドドロップするコードを書きました。
Swiftのバージョンは2.2です。

やりたいこととしては、ナビゲーションバーのeditButtonを押してから、セルを長押してドラッグアンドドロップしてセルの配列を変更するというものです。

しかしながら、ビルドは通るものの、セルを長押ししても何も反応しませんし動きません。

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
    var collectionView: UICollectionView?
    var longPressGesture: UILongPressGestureRecognizer?
    var panGesture: UIPanGestureRecognizer?
    var selectedIndexPath: NSIndexPath?

    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupSubviews()
        self.autolayoutSubviews()

        self.navigationItem.leftBarButtonItem = self.editButtonItem()
    }

    func setupSubviews() {
        let flowLayout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        flowLayout.minimumInteritemSpacing = 10.0
        flowLayout.minimumLineSpacing = 10.0
        flowLayout.sectionInset = UIEdgeInsets(top: 10.0, left: 10.0, bottom: 10.0, right: 10.0)
        flowLayout.itemSize = CGSizeMake(300.0, 100.0)

        self.collectionView = UICollectionView(frame: CGRectZero, collectionViewLayout: flowLayout)
        self.collectionView!.translatesAutoresizingMaskIntoConstraints = false
        self.collectionView!.dataSource = self
        self.collectionView!.delegate = self
        self.collectionView!.registerClass(GoodCell.self, forCellWithReuseIdentifier: "GoodCell")
        self.collectionView!.registerClass(BadCell.self, forCellWithReuseIdentifier: "BadCell")
        self.collectionView!.registerClass(TeacherCell.self, forCellWithReuseIdentifier: "TeacherCell")
        self.collectionView!.backgroundColor = UIColor.whiteColor()
        self.view.addSubview(self.collectionView!)

        panGesture = UIPanGestureRecognizer(target: self, action: #selector(ViewController.handlePanGesture(_:)))
    //self.panGesture?.enabled = false
    self.collectionView?.addGestureRecognizer(panGesture!)
    //panGesture?.delegate = self
    self.view.addGestureRecognizer(self.panGesture!)

    longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.handleLongGesture(_:)))
    longPressGesture?.minimumPressDuration = 0.5
    self.longPressGesture?.enabled = false
    self.collectionView?.addGestureRecognizer(self.longPressGesture!)
    //longPressGesture!.delegate = self
    self.view.addGestureRecognizer(self.longPressGesture!)
    }

    func autolayoutSubviews() {    self.collectionView!.topAnchor.constraintEqualToAnchor(self.view.topAnchor).active = true
        self.collectionView!.leadingAnchor.constraintEqualToAnchor(self.view.leadingAnchor).active = true
        self.collectionView!.trailingAnchor.constraintEqualToAnchor(self.view.trailingAnchor).active = true
        self.collectionView!.bottomAnchor.constraintEqualToAnchor(self.view.bottomAnchor).active = true
    }

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 3
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cellTypeNumber = indexPath.item % 3
        switch cellTypeNumber {
        case 0:
            let cell1 = collectionView.dequeueReusableCellWithReuseIdentifier("GoodCell", forIndexPath: indexPath) as! GoodCell
            cell1.backgroundColor = UIColor.grayColor()
            return cell1

        case 1:
            let cell2 = collectionView.dequeueReusableCellWithReuseIdentifier("BadCell", forIndexPath: indexPath) as! BadCell
            cell2.backgroundColor = UIColor.brownColor()
            return cell2

        default:
            let cell3 = collectionView.dequeueReusableCellWithReuseIdentifier("TeacherCell", forIndexPath: indexPath) as! TeacherCell
            cell3.backgroundColor = UIColor.grayColor()
            return cell3
        }
    }

    func collectionView(collectionView: UICollectionView, canMoveItemAtIndexPath indexPath: NSIndexPath) -> Bool {
        return true
    }

    func collectionView(collectionView: UICollectionView, moveItemAtIndexPath sourceIndexPath: NSIndexPath, toIndexPath destinationIndexPath: NSIndexPath) {
    }

    func handleLongGesture(gesture: UILongPressGestureRecognizer) {
        switch (gesture.state) {
        case UIGestureRecognizerState.Began:
            selectedIndexPath = self.collectionView?.indexPathForItemAtPoint(gesture.locationInView(self.collectionView))
        case UIGestureRecognizerState.Changed:
            break
        default:
            selectedIndexPath = nil
        }
    }

    func handlePanGesture(gesture: UIPanGestureRecognizer) {
        switch (gesture.state) {
        case UIGestureRecognizerState.Began:
            collectionView?.beginInteractiveMovementForItemAtIndexPath(selectedIndexPath!)
        case UIGestureRecognizerState.Changed:
            collectionView?.updateInteractiveMovementTargetPosition(gesture.locationInView(gesture.view!))
        case UIGestureRecognizerState.Ended:
            collectionView?.endInteractiveMovement()
        default:
            collectionView?.cancelInteractiveMovement()
        }
    }

　　　　　func LongGesture(sender: UILongPressGestureRecognizer) {
print("LongPressed")

}

}

extension ViewController: UIGestureRecognizerDelegate {
    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouledRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        if gestureRecognizer
            == longPressGesture {
            return panGesture
                == otherGestureRecognizer
        }
        if gestureRecognizer
            == panGesture {
            return longPressGesture == otherGestureRecognizer
        }
        return true
    }

    func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
        guard gestureRecognizer ==
            self.panGesture else {
                return true
        }
        return selectedIndexPath != nil
    } 
}