Question 67958 in IOS Swift Question posted in
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How to create dynamic collection view in a table view cell, without reloading table view swift? – Ios swift

I’m using this code in cellForRowAt :

cell.frame = tableView.bounds
    cell.layoutIfNeeded()
    collectionView.reloadData()
    heightConstraint.constant = collectionView.collectionViewLayout.collectionViewContentSize.height

and

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return UITableView.automaticDimension
}

This works at the first time, but when I load more items to collection view it doesn’t work unless I use tableView.reloadData()

But when I use tableView.reloadData() scrolling stops for a second, and I want it to flow without freezing.

Anyone has a solution? Thanks in advance.

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2

Answers


  1. 0

    Any time you change a cell height after it has been displayed, you need to tell the table view about it.

    You haven’t shown how or when you "load more items to collection view" … but after you do that, call:

    tableView.performBatchUpdates(nil, completion: nil)

    That will cause the table view to recalculate and update the row heights, without calling .reloadData().

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  2. 0

    You can reload only the cell that you are updating in case you don’t want to reload the table

        tableView.reloadRows(at: [IndexPath], with: .none)
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