ios - 如何在收藏 View 中显示复选标记(图像)

Question

在表格 View 中，我们可以轻松地在单元格上打勾。

但在 Collection View 中，当我们选择一个单元格(图像)时，我们如何放置复选标记？

我只是在单元格和 ImageView 中拍摄了一个 ImageView ，并放置了一个刻度线图像。我的代码如下。

但它不起作用。

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{

   //  handle tap events
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! customCollectionViewCell


    if(cell.checkMarkImage.hidden == true)
    {
        print("Hidden")
       cell.checkMarkImage.hidden = false

    }
    else
    {
         cell.checkMarkImage.hidden = true
        print("No Hidden")
    }
}

Answer 1

//委托(delegate)方法cellForItemAtIndexPath

func collectionView(collectionView: UICollectionView,
cellForItemAtIndexPath indexPath: NSIndexPath) ->
UICollectionViewCell
{
    //Get a reference to our storyboard cell
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(
                                                            "pickSomecell",
                   forIndexPath: indexPath) as! pickSomeGridViewController

    //Show Images in grid view
    cell.cellImage.image = self.arrAllOriginalImages[indexPath.row]
                                                            as? UIImage        

    //Check Mark toggle.
    cell.toggleSelected()      

    //return cell.
    return cell
}

并在 pickSomeGridViewController 中显示已选中或未选中的复选标记图像。

class pickSomeGridViewController: UICollectionViewCell{
//Outlet of cell image.
@IBOutlet var cellImage: UIImageView!

//Outlet of checkMark image.
@IBOutlet var cellCheckMarkImage: UIImageView!

//Function  for select and deselect checkmark.
  func toggleSelected ()
  {
    //If image is selected.
    if (selected)
    {
            //Show check mark image.
            self.cellCheckMarkImage.hidden = false           
    }   

    else
    {
             //Hide check mark image.
            self.cellCheckMarkImage.hidden = true            
    }
  }   
 }