UICollectionView adding button to cell - ios

Question

I'm adding a button to a cell of a collection view as below
- (void)activateDeletionMode:(UILongPressGestureRecognizer *)gr
{
if (gr.state == UIGestureRecognizerStateBegan)
{
NSLog(#"deletion mode");
if(self.isDeleteActive == NO){
self.isDeleteActive = YES;
NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:[gr locationInView:self.collectionView]];
UICollectionViewCell *cell = [self.collectionView cellForItemAtIndexPath:indexPath];
self.deletedIndexpath = indexPath.row;
self.deleteButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[self.deleteButton addTarget:self
action:#selector(deleteImage:)
forControlEvents:UIControlEventTouchUpInside];
[self.deleteButton setBackgroundImage: [UIImage imageNamed:#"delete.png"] forState:UIControlStateNormal];
self.deleteButton.frame = CGRectMake(10, 0, 10, 10);
[cell addSubview:self.deleteButton];
}
}
}
The problem is, when the cell is reused when the collection view is scrolled, I see the button displayed in this cell too. How do I avoid this happening? Code for collection view below:
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath;
{
Cell *cell = [cv dequeueReusableCellWithReuseIdentifier:kCellID forIndexPath:indexPath];
cell.image.image = [self.imageArray objectAtIndex:indexPath.row];
return cell;
}

Answer 1

In the past I've done things like this, when adding the view add a tag:
self.deleteButton.frame = CGRectMake(10, 0, 10, 10);
//Mark the view with a tag so we can grab it later
self.deleteButton.tag = DELETE_BUTTON_TAG;
[cell addSubview:self.deleteButton];
Then remove it from any new recycled cells:
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath;
{
Cell *cell = [cv dequeueReusableCellWithReuseIdentifier:kCellID forIndexPath:indexPath];
//Remove the delete view if it exists
[[cell viewWithTag:DELETE_BUTTON_TAG] removeFromSuperview];
cell.image.image = [self.imageArray objectAtIndex:indexPath.row];
return cell;
}