UICollectionView with cell partially visible

uicollectionview visible cells not correct
uicollectionview check if cell is fully visible
uicollectionview visible cells swift
uicollectionview did display cell
current visible cell collectionview
collectionview willdisplaycell swift 4
uicollectionview reload visible cells
indexpathsforvisibleitems

I would like to make a collectionView that can be scrolled horizontally and has only one cell item visible and one partially visible. Cells should take the whole height of the collectionView.

I have played with the sectionInset of collectionView. But couldn't achieve my target.

My Code:

import UIKit

class BooksController: UIViewController {

    @IBOutlet weak var booksCollectionView: UICollectionView!

    override func viewDidLoad() {
        super.viewDidLoad()


        let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 20)
        layout.itemSize = CGSize(width: booksCollectionView.frame.width, height: booksCollectionView.frame.height)
        layout.minimumInteritemSpacing = 10
        layout.minimumLineSpacing = 10
        layout.scrollDirection = .horizontal
        booksCollectionView.collectionViewLayout = layout


        booksCollectionView.register(UINib(nibName: "BookCell", bundle: .main), forCellWithReuseIdentifier: "BookCell")
        booksCollectionView.dataSource = self
        booksCollectionView.delegate = self
        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

extension BooksController: UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "BookCell", for: indexPath) as? BookCell {
            return cell
        }
        return UICollectionViewCell()
    }
}

extension BooksController: UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
//    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {
//        return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 20)
//    }
}

Target (Something similar to the collectionView here)

My Output

Use this piece of code

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let width = self.view.frame.width - 100
        let height = self.view.frame.height
        return CGSize(width: width, height: height)
    }

Don't forget to add this delegate

UICollectionViewDelegateFlowLayout

How can I tell when a cell becomes visible in UICollectionView so , Now this method will get called before your cell is actually visible since collection views load cells a bit in advance for efficiency purposes, but hopefully this can� An array of UICollection View Cell objects. If no cells are visible, this method returns an empty array. If no cells are visible, this method returns an empty array. Discussion

Add UICollectionViewDelegateFlowLayout

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: self.view.frame.width, height: self.view.frame.height)
    }

indexPathsForVisibleItems, The value of this property is an unsorted array of NSIndexPath objects, each of which corresponds to a visible cell in the collection view. This array does not� I have set UICollectionView such that its size and cell size is same, means only once cell is displayed at a time. Problem: Now when user scroll UICollectionView I need to know which cell is visible I have to update other UI elements on change.

Use this Pod MSPeekCollectionViewDelegateImplementation

GitHub

visibleCells, An array of visible cells currently displayed by the collection view. Availability. iOS 10.0+; Mac Catalyst 13.0+; tvOS 10.0+. If you have a collection view of tiles you can design the app so that the tile dimensions don't fit completely in the frame. e.g. 3.5 tiles can be shown with the 4th tile partially visible. Another option is to display page/scroll indicators at the bottom of the app. In one app we've also animated the scrolling, but I'd only do this once.

You can use if you need to show half of the second collection view cell

collectionView.contentInset = UIEdgeInsets.init(top: 0, left: 10, bottom: 0, right: 10)

For height and with of the collection view you can try CollectionViewLayout delegate

iOS UICollectionView: How to show there's hidden cells, e.g. 3.5 tiles can be shown with the 4th tile partially visible. Another option is to display page/scroll indicators at the bottom of the app. In one app we've also� UICollectionView contains several key components, as you can see below: Take a look at these components one-by-one: UICollectionView: The main view in which the content is displayed, similar to a UITableView. Like a table view, a collection view is a UIScrollView subclass. UICollectionViewCell: This is similar to a UITableViewCell in a table view. These cells make up the content of the view and are added as subviews to the collection view.

Expanding Cells in iOS Collection Views, Learn how to make expanding cells in iOS collection views, as in the Out of the box, UICollectionView is a powerful and ultra-flexible way but it appears masked by the standard cell height until the cell is fully in view. By doing this, you're making sure the session details aren't visible in standard cells,� The collection view presents items onscreen using a cell, which is an instance of the UICollection View Cell class that your data source configures and provides. Figure 1 A collection view using the flow layout. In addition to its cells, a collection view can present data using other types of views.

how to get indexPath for cell which is located in the center of , How can i find indexPath for cell in the middle of UICollectionView ? I have horizontal scrolling and only one big cell is visible (partially two other cell s on the � UICollectionView-Not displaying cells (4) What I'm trying to achieve is a 3x3 table with UICollectionView. But it just doesn't display any cells when running the application. It does display the background color of the CollectionView though (which I set to blue) Can someone help me here?

Tutorial: Horizontal UICollectionView with paging, But, in my design, each cell (page) is smaller then the size of the collectionView . The cells are centered and the previous cell and the next cell peek from the� So, I select 90x90 (or the like) on the UICollectionView and display the original png's (no matter the size). hope it may help others. To restate the problem, the collection view cells contain images that are loaded lazily, but you require that they appear immediately.

Comments
  • Seems to be what you are looking for: stackoverflow.com/questions/35045155/…
  • Reduce cell width to 50 or 100 as your requirement.
  • It might be better to use the collectionView.frame instead of self.view.frame since the collectionView might be smaller than the view.
  • When the collectionView is scrolled, I need the second(next) items should be visible fully. I have tried the above way. But in this way, when I scroll, the second item is not visible fully. instead, the rest of it is visible
  • What do you mean is not visible fully? You want the snap effect? How could it be not visible fully if its width is less big than the collection view?
  • When the collectionView is scrolled, I need the second(next) items should be visible fully. I have tried the above way. But in this way, when I scroll, the second item is not visible fully. instead, the rest of it is visible
  • In storyboard, remove default insets in UICollectionView.