我正在以编程方式创建单元格，并为每个单元格添加一个删除按钮。问题是，我想切换它们的.hidden状态。我的想法是使用一个编辑按钮，同时切换所有按钮的状态。也许我的方法不对？

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("verticalCell", forIndexPath: indexPath) as! RACollectionViewCell
    let slide = panelSlides[indexPath.row]
    cell.slideData = slide
    cell.slideImageView.setImageWithUrl(NSURL(string: IMAGE_URL + slide.imageName + ".jpg")!)
    cell.setNeedsLayout()

    let image = UIImage(named: "ic_close") as UIImage?
    var deleteButton = UIButton(type: UIButtonType.Custom) as UIButton
    deleteButton.frame = CGRectMake(-25, -25, 100, 100)
    deleteButton.setImage(image, forState: .Normal)
    deleteButton.addTarget(self,action:#selector(deleteCell), forControlEvents:.TouchUpInside)
    deleteButton.hidden = editOn
    cell.addSubview(deleteButton)
    return cell
}

@IBAction func EditButtonTap(sender: AnyObject) {
    editOn = !editOn
    sidePanelCollectionView.reloadData()
}