UITapGestureRecognizer in UICollectionView

CollectionViewController.swift

//
//  CollectionViewController.swift
//  CollectionViewTouch
//
//  Created by ooba on 30/01/2018.
//  Copyright © 2018 ooba. All rights reserved.
//

import UIKit

private let reuseIdentifier = "Cell"

class CollectionViewController: UICollectionViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(gesture(_:)))
        tap.numberOfTapsRequired = 1
        tap.numberOfTouchesRequired = 1
        tap.delegate = self
        collectionView?.addGestureRecognizer(tap)
    }
    
    // MARK: UICollectionViewDataSource

    override func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 3
    }


    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 6
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath)
    
        // Configure the cell
    
        return cell
    }
    
    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print(#function, indexPath)
    }

    @IBAction func gesture(_ sender: UITapGestureRecognizer) {
        let point = sender.location(in: collectionView)
        if let indexPath = collectionView?.indexPathForItem(at: point) {
            print(#function, indexPath)
        }
    }
}

extension CollectionViewController: UIGestureRecognizerDelegate {
    
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        let point = touch.location(in: collectionView)
        if let indexPath = collectionView?.indexPathForItem(at: point),
            let cell = collectionView?.cellForItem(at: indexPath) {
            return touch.location(in: cell).y > 50
        }
        
        return false
    }
}