CollectionView Snap to the next cell

_CollectionViewFlowLayout

//
//  TransactionsCollectionViewFlowLayout.swift
//
//  Created by Shahriyar Soheilizadeh on 19/12/2019.
//  Copyright © 2019 Shahriyar Soheilizadeh. All rights reserved.
//

import UIKit

class TransactionsCollectionViewFlowLayout: UICollectionViewFlowLayout
{
    
    override func prepare() {
        super.prepare()
        
        scrollDirection = .horizontal
    }
    
    override public func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {

        guard let collectionView = collectionView else {
            return super.targetContentOffset(forProposedContentOffset: proposedContentOffset, withScrollingVelocity: velocity)
        }

        var offsetAdjustment = CGFloat.greatestFiniteMagnitude
        
        // If you don't have minimumLineSpacing, remove it at the end of this line.
        let horizontalOffset = proposedContentOffset.x + collectionView.contentInset.left + minimumLineSpacing

        let targetRect = CGRect(x: proposedContentOffset.x, y: 0, width: collectionView.bounds.size.width, height: collectionView.bounds.size.height)

        let layoutAttributesArray = super.layoutAttributesForElements(in: targetRect)

        layoutAttributesArray?.forEach({ (layoutAttributes) in
            let itemOffset = layoutAttributes.frame.origin.x
            if fabsf(Float(itemOffset - horizontalOffset)) < fabsf(Float(offsetAdjustment)) {
                offsetAdjustment = itemOffset - horizontalOffset
            }
        })

        return CGPoint(x: proposedContentOffset.x + offsetAdjustment, y: proposedContentOffset.y)
    }

}