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Questions tagged [uicollectionviewdiffabledatasource]

75 questions
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1 answer

DiffableDataSource CollectionView returning no items in section

Here is my class: class MediaViewController: UIViewController{ var collectionView: UICollectionView! = nil private lazy var dataSource = makeDataSource() fileprivate typealias DataSource =…
BigBoy1337
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Correct way to update model variable inside UICollectionViewDiffableDataSource in iOS

I'm developing an application with UICollectionViewDiffableDataSource. Everything works like a charm, in fact I've got my collectionView updated automatically when I add a new model. However I'm unable to see updated cell when I update one of my…
Bellots
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In UICollectionViewDiffableDataSource is there any way to make Supplementary View's (Header/Footer) partial text clickable?

Recently I started using Diffable Datasource. I have a section footer which has a text which should be partial clickable. Let's say the footer is: "To know more click here" So if user taps the click here it will redirect to a link. I know normally…
Mahi Al Jawad
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dataSource.snapshot().itemIdentifiers(inSection:) works extremely inefficient

Consider an app that uses UICollectionViewDiffableDataSource for the data source of UICollectionView. private func makeDataSource() -> DataSource { return DataSource(collectionView: collectionView) { collectionView, indexPath, task in …
Nominalista
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UICollectionView compositional layout: re-use dequeued cell not working iOS 14

I'm using compositional list layout with diffable data source for my collection view, for some reason I have to re-use dequeued cell, so the code looks like: let cell = referenceCell ?? collectionView.dequeue(MyCell.self, for:…
Heuristic
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UICollectionView scroll to cell without loading initial cells

I have a UICollectionView using a UICompositionalLayout for the layout and a UIDiffableDataSource for the data source. The layout is a horizontal layout with one item per page (think of a page view controller). This works fine, but the problem is…
ashipma
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How to create dynamic number of sections in diffable UICollectionView?

I know there is a way to decide the number of sections later on if we use the UICollectionView datasource. func numberOfSections(in collectionView: UICollectionView) -> Int Just want to know are there any way for diffable datasource?
yonlau
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UICollectionViewDiffableDataSource with reference types as the data items

I have an existing class that's a data model. I want to use it as the model for a collection view using UICollectionViewDiffableDataSource. This class looks like this: class DataItem: Hashable { let id: String var text: String …
Mr.P
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layout.sectionHeadersPinToVisibleBounds in UICollectionViewDiffableDataSource

I want to keep the header in a UICollectionViewDiffableDataSource, as I understand I can do it with layout.sectionHeadersPinToVisibleBounds, but it's not usable with my collectionView layout private func createLayout() -> UICollectionViewLayout { …
martin wotterman
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UICollectionViewDiffableDataSource cellProvider closure deallocated reference

I've got my view controller setup like: class HomeViewController: UIViewController { unowned var viewModel: HomeViewModelInterface! private lazy var collectionViewDataSource: UICollectionViewDiffableDataSource = { …
Mr.P
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Need to implement pagination on Collection views using Compositional layout / How to reset collectionViewLayout with new section without blinking?

I have 5 different section, 3 of them i load during initial call and the remaining 2 during scroll(pagination). If I am creating UICollectionViewCompositionalLayout before hand then the data is getting loaded in the order NSCollectionLayoutSection…
Abhinav Jha
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Why can't I set dataSource using UICollectionViewDiffableDataSource when I initialize my collectionView(programmatically)?

Sorry if I ask a dumb question first, But I have been wondering why this happen? I have been using UICollectionViewDiffableDataSource on my project using storyboard, And I try to create collectionView programmatically currently, I found that I can't…
Krauser Huang
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Swift: Accessing sections when using diffable data sources?

I have a collection view with multiple sections and eventually multiple cell types. I've read that we should avoid using indexPath with using diffable data sources. Is the way I currently access sections defeat the purpose of using diffable data…
VAlexander
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Show different layout section if collection view section has no data to display

I am trying to implement a collection view that consists of the following sections: User section: Showing the user's profile info (avatar, email, etc) Children section: Showing the user's children (if available) Statistics section: Showing the…
christostsang
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UICollectionView snapshot takes too long to RE-apply

I have a UICollectionView with a large set of data source, e.g. 30000+ items; And the data source varies depending on screen orientation (ie. portrait, landscape), so I re-create and re-apply the snapshot whenever screen rotates. What I noticed, is…
Heuristic
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