how to reload a collectionview that is inside a tableviewcell

Question

I have a collectionView inside a tableViewCell

for example: example credit: How to use StoryBoard quick build a collectionView inside UITableViewCell

I would like to reload the collectionView when I update information.

I have put a print in the collectionView's cellForItemAtIndexPath to test if it is being called but it isn't. How can I get the collectionView to reload?

I'm voting to close this question as off-topic because its not really an issue as "i just needed to call cell.collectionView.reloadData()" — some_id, Feb 25 '16 at 09:05

score 10 · Accepted Answer · edited Feb 25 '16 at 09:08

10

I found out how! In my tableViewCell class I just need to link the collectionView as an outlet so in my tableViewCell's cellForRowAtIndexPath I just needed to call cell.collectionView.reloadData()

edited Feb 25 '16 at 09:08

DeyaEldeen

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answered Feb 25 '16 at 08:32

stephw

513
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2

After I added cell.collectionView.reloadData(), CollectionView scrolling is so slow in my project. How to solved that kind of problem. – San San May 09 '17 at 10:59
2

I am also facing the same problem. How can we fix slow scrolling? – Navjot Jun 08 '17 at 18:08
Try the following on the collection view - invalidateLayout and layoutIfNeeded – SRP-Achiever Dec 14 '18 at 15:20

score 6 · Answer 2 · answered Oct 06 '19 at 20:37

Simplest Way

for cell in tableView.visibleCells {
    (cell as? YourTableViewCell)?.collectionView.reloadData()
}

Or If you need to reload Specific UICollectionView

if let cell = tableView.cellForRow(at: IndexPath(row: 0, section: 0)) as? YourTableViewCell {
   cell.collectionView.reloadData()
}

score 1 · Answer 3 · answered Oct 19 '18 at 01:56

1st on tableview cell create this function:

func collectionReloadData(){
        DispatchQueue.main.async(execute: {
            self.collectionView.reloadData()
        })
    }

then call it from

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { ...

    cell.collectionReloadData()

score 0 · Answer 4 · edited Feb 25 '16 at 09:28

0

create tags for collection view with indexPath.row of UITableView and create an instance of the UICollectionView using the tag and reload !

edited Feb 25 '16 at 09:28

DeyaEldeen

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10
42
75

answered Feb 25 '16 at 08:58

good4pc

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how to reload a collectionview that is inside a tableviewcell

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