Re: UICollectionView Moving
Re: UICollectionView Moving
- Subject: Re: UICollectionView Moving
- From: Luther Baker <email@hidden>
- Date: Mon, 07 Mar 2016 13:44:43 -0600
Thanks Luke! That was it - I can drag and drop successfully now.
One more question, how do I modify a property of the item I'm dragging
around if the property is NOT currently in UICollectionViewLayoutAttributes
... I don't see a call to the datasource or delegate when I select the cell
for moving ... so I'm not sure how to change the background color to "red"
for instance.
Would I have to add my own view to the superview and manually move it
around in the dragging callbacks?
Thanks!
-Luther
On Mon, Mar 7, 2016 at 11:59 AM, Luke Hiesterman <email@hidden> wrote:
> I’d check your return value for this method in your layout:
>
> - (UICollectionViewLayoutAttributes
> *)layoutAttributesForInteractivelyMovingItemAtIndexPath:(NSIndexPath
> *)indexPath withTargetPosition:(CGPoint)position NS_AVAILABLE_IOS(9_0);
>
> Luke
>
> On Mar 7, 2016, at 9:55 AM, Luther Baker <email@hidden> wrote:
>
> I followed the directions here,
>
> http://nshint.io/blog/2015/07/16/uicollectionviews-now-have-easy-reordering/
> - to add iOS9 style dragging to my UICollectionView - and it sort of works.
>
> As described in the article, I added a long press gesture recognizer and
> wired it in to make calls on the collection view -- but now, if I long
> press, the element under my finger disappears. As I drag the transparent
> image around, the other elements shift - but I can never see the element I
> am dragging around. When I let go, there is simply a hole left where I
> "dropped" the element.
>
> I do, very much, have a custom layout and I'm not sure that if, for drag, I
> need to do anything special. Do I need to calculate the frame of the item I
> am dragging around? I'm not sure what to try next except to roll my own
> dragging. Any thoughts or things to try?
>
> Thanks in advance.
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