private func setupCollectionViewItemSize() {
        if collectionViewFlowLayout == nil {
            let numberOfItemFerRow: CGFloat = 2
            let lineSpacing: CGFloat = 5
            let interItemSpacing: CGFloat = 5
            
            let width = (UIScreen.main.bounds.width - (numberOfItemFerRow - 1) * interItemSpacing) / numberOfItemFerRow
            let height = width
            
            collectionViewFlowLayout = UICollectionViewFlowLayout()
            collectionViewFlowLayout.itemSize = CGSize(width: width, height: height)
            collectionViewFlowLayout.sectionInset = UIEdgeInsets.zero
            collectionViewFlowLayout.scrollDirection = .vertical
            collectionViewFlowLayout.minimumLineSpacing = lineSpacing
            collectionViewFlowLayout.minimumInteritemSpacing = interItemSpacing
            
            collectionView.setCollectionViewLayout(collectionViewFlowLayout, animated: true, completion: nil)
        }
    }

lazy var doubleTapRecognizer: UITapGestureRecognizer = {
        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(didDoubleTap))
        tapRecognizer.numberOfTapsRequired = 2
        tapRecognizer.delaysTouchesBegan = true
        tapRecognizer.cancelsTouchesInView = true
        return tapRecognizer
    }()