uicollectionviewlayout – Page 2

UICollectionVIew: How can I remove the space on top first cell’s row?

June 9, 2023 by Tarik

UICollectionView is descendant of UIScrollView class which has contentInset property, setting -20 top inset fixes the problem [self.calendarView setContentInset:UIEdgeInsetsMake(-20, 0, 0, 0)]; However, the problem comes from UIViewController’s automaticallyAdjustsScrollViewInsets property. By documentation: Default value is YES, which allows the view controller to adjust its scroll view insets in response to the screen areas consumed by … Read more

UICollectionView horizontal paging – can I use Flow Layout?

June 8, 2023 by Tarik

Here I share my simple implementation! The .h file: /** * CollectionViewLayout for an horizontal flow type: * * | 0 1 | 6 7 | * | 2 3 | 8 9 | —-> etc… * | 4 5 | 10 11 | * * Only supports 1 section and no headers, footers or … Read more

What is a ‘UIView-Encapsulated-Layout-Width’ constraint?

May 4, 2023 by Tarik

A quick and nice fix, is to assign 999 priority value to the custom constraints with high priority. The encapsulated & auto-generated constraints should dominate with higher priority than your constraints. https://stackoverflow.com/a/25795758/590010

UICollectionView doesn’t bounce when datasource has only 1 item

April 18, 2023 by Tarik

UICollectionView has the properties alwaysBounceHorizontal and alwaysBounceVertical. Setting the horizontal to YES did the trick.

Dynamic size UICollectionView cell

April 17, 2023 by Tarik

Sorry this is super late… But maybe this will help people who haven’t found an answer yet. If you have your images in an array, you can simply reference the image size and make the adjustments to the cell size from there: – (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath { UIImage *image = [imageArray objectAtIndex:indexPath.row]; //You … Read more

How to create a centered UICollectionView like in Spotify’s Player

March 31, 2023 by Tarik

In order to create an horizontal carousel layout, you’ll have to subclass UICollectionViewFlowLayout then override targetContentOffset(forProposedContentOffset:withScrollingVelocity:), layoutAttributesForElements(in:) and shouldInvalidateLayout(forBoundsChange:). The following Swift 5 / iOS 12.2 complete code shows how to implement them. CollectionViewController.swift import UIKit class CollectionViewController: UICollectionViewController { let collectionDataSource = CollectionDataSource() let flowLayout = ZoomAndSnapFlowLayout() override func viewDidLoad() { super.viewDidLoad() title = … Read more

Create a book shelf by using UICollectionView

March 21, 2023 by Tarik

I would suggest to check your last row and do the [self.collectionView ScrollEnable:NO] same for first row, set background color clear of collectionView and collectionViewCell and that bookshelf image sets on background view.

UICollectionView Layout Issue

March 20, 2023 by Tarik

I found that, using storyboards, you have to go into the storyboard and click on the overall View Controller (the view should be highlighted in blue) and go to the Attributes Inspector (the fourth tab on the right side of the screen) and unchecking the “Under Top Bars”, “Under Bottom Bars”, and “Under Opaque Bars.” … Read more

Aligning right to left on UICollectionView

February 16, 2023 by Tarik

Without doing any Xtransform to the collection view, simply forced RTL: YourCollectionView.semanticContentAttribute = UISemanticContentAttribute.forceRightToLeft

iOS 10 bug: UICollectionView received layout attributes for a cell with an index path that does not exist

February 14, 2023 by Tarik

This happened to me when number of cells in collectionView changed. Turns out I was missing invalidateLayout after calling reloadData. After adding it, I haven’t experienced any more crashes. Apple has made some modifications to collectionViews in iOS10. I guess that’s the reason why we are not experiencing same problem on older versions. Here’s my … Read more