can delete collection view cell

CanDeleteCollectionViewCell.swift

import UIKit

protocol CollectionViewCellDeleteDelegate: class {
    func collectionViewCellDeleteClick(cell: UICollectionViewCell)
    func collectionViewDidSelectCell(cell: UICollectionViewCell)
}

class CanDeleteCollectionViewCell: UICollectionViewCell, UIScrollViewDelegate {
    
    static let notifyDeleteCellScrollName = "notifyScrollName"
    
    weak var delegate: CollectionViewCellDeleteDelegate?
    override func awakeFromNib() {
        super.awakeFromNib()
        setupDelete()
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "notifyresetScroll:", name: CanDeleteCollectionViewCell.notifyDeleteCellScrollName, object: nil)
        let singleTap = UITapGestureRecognizer(target: self, action: "didSelectCell:")
        scrollView.addGestureRecognizer(singleTap)
    }
    
    func didSelectCell(gesture: UITapGestureRecognizer) {
        NSNotificationCenter.defaultCenter().postNotificationName(CanDeleteCollectionViewCell.notifyDeleteCellScrollName, object: self)
        if gesture.state == .Ended {
            delegate?.collectionViewDidSelectCell(self)
        }
    }
    
    func notifyresetScroll(notification: NSNotification) {
        if notification.object as? CanDeleteCollectionViewCell == self {
            return
        }
        scrollView.setContentOffset(CGPointMake(0, 0), animated: true)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        var buttonWidth = frame.width / 3
        if buttonWidth > CGFloat(80) {
            buttonWidth = CGFloat(80)
        }
        mainView.frame = CGRectMake(0, 0, contentView.frame.width, contentView.frame.height)
        scrollView.frame = CGRectMake(0, 0, contentView.frame.width, contentView.frame.height)
        deleteButton.frame = CGRectMake(contentView.frame.width, 0, buttonWidth, contentView.frame.height)
        scrollView.contentSize = CGSizeMake(contentView.frame.width + deleteButton.frame.width, contentView.frame.height)
    }
    
    var scrollView = UIScrollView()
    var deleteButton = UIButton()
    var mainView = UIView()
    func setupDelete() {
        scrollView.pagingEnabled = true
        scrollView.showsHorizontalScrollIndicator = false
        scrollView.bounces = false
        scrollView.delegate = self
        contentView.addSubview(scrollView)
        
        mainView.frame = CGRectMake(0, 0, frame.width, frame.height)
        scrollView.addSubview(mainView)
        
        deleteButton.setTitle("Delete", forState: .Normal)
        deleteButton.backgroundColor = UIColor.redColor()
        deleteButton.addTarget(self, action: "deleteButtonClick:", forControlEvents: .TouchUpInside)
        scrollView.addSubview(deleteButton)
    }
    
    func scrollViewWillBeginDragging(scrollView: UIScrollView) {
        NSNotificationCenter.defaultCenter().postNotificationName(CanDeleteCollectionViewCell.notifyDeleteCellScrollName, object: self)
    }
    
    func deleteButtonClick(sender: UIButton) {
        delegate?.collectionViewCellDeleteClick(self)
    }
}