How to scroll to a particluar index in collection view in swift

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We have a collection view. I have made a calendar which shows dates horizontally & I scroll dates horizontally. Now on screen I see only 3-4 dates. Now I want to auto scroll to a particular selected date when calendar screen I shown.So the date I want to scroll to is not visible yet.

For that I got the indexpath for particular cell. Now I am trying to scroll it to particular indexpath.

  func scrollCollectionView(indexpath:IndexPath)
  {
   // collectionView.scrollToItem(at: indexpath, at: .left, animated: true)
    //collectionView.selectItem(at: indexpath, animated: true, scrollPosition: .left)
    collectionView.scrollToItem(at: indexpath, at: .centeredHorizontally, animated: true)
    _ = collectionView.dequeueReusableCell(withReuseIdentifier: "DayCell", for: indexpath) as? DayCell

  }

Please tell how can I implement it?

In viewDidLoad of your controller, you can write the code for scrolling to a particular index path of collection view.

self.collectionView.scrollToItem(at:IndexPath(item: indexNumber, section: sectionNumber), at: .right, animated: false)

How to scroll to a particular index in collection view in swift 4 , You can use one of the life cycle method or even after your reload data call. Something like this, override func viewDidLayoutSubviews()� Open default Main.Storyboard, there is default view controller in Interface Builder (IB), add UICollectionView with top, left, right and height to 0,0,0 and 200 respectively. There is a default

In Swift 4, this worked for me:

override func viewDidLayoutSubviews() {

    collectionView.scrollToItem(at:IndexPath(item: 5, section: 0), at: .right, animated: false)
}

placing it anywhere else just resulted in weird visuals.

scrollToItem(at:at:animated:), scrollToItem(at:at:animated:) Scrolls the collection view contents until the specified item is visible. The index path of the item to scroll into view. scrollPosition. Hey, today I’m presenting you horizontal pagination in swift 5. The reference I have taken from one of my organisation’s library. Basic pagination works as you pulled to a threshold value.

You can use this

self.collectionView.scrollToItem(at:IndexPath(item: index, section: 0), at: .right, animated: false)

selectItem(at:animated:scrollPosition:), Swift; Objective-C Selects the item at the specified index path and optionally scrolls it into view. An option that specifies where the item should be positioned when scrolling finishes. For a list of possible values, see UICollectionView. ️ Subscribe 🔥 News 📱 Apps 📘 Articles 🤔 About 2018/04/17 Ultimate UICollectionView guide with iOS examples written in Swift. Learn how to use UICollectionView, with highly reusable UIKit components and some MVVM pattern without the going nuts with index path calculations.

I used your answer @PGDev but I put it in viewWillAppear and it works well for me.

self.collectionView?.scrollToItem(at:IndexPath(item: yourIndex, section: yourSection), at: .left, animated: false)

How to force UICollectionView to always scroll item to center?, Hi everyone! I'd like to be able to scroll any cell in my UICollectionView ( FlowLayout) to center. Objective-C / Swift. 1 point � 2 I'm afraid I need to subclass FlowLayout and tweak that (start to position at contentOffset maybe?) the P12 certificate (I think my boss knows the password for the certificate, but I'm not certain). The collection view’s data source object provides both the content for items and the views used to present that content. When the collection view first loads its content, it asks its data source to provide a view for each visible item. The collection view maintains a queue or list of view objects that the data source has marked for reuse.

In viewDidLoad of your controller, you can write the code

     self.myCollectionView.performBatchUpdates(nil) { (isLoded) in

     if isLoded{
                 self.myCollectionView.scrollToItem(at: self.passedContentOffset, at: [.centeredVertically,.centeredHorizontally], animated: false)
               }
      } 

To scroll the collectionViewCell to centre, you need to simply call , To scroll the collectionViewCell to centre, you need to simply call scrollToItem(at: at:animated:) on collectionView with the relevant scrollPosition� 5. On the Attributes Inspector of the Collection View, change the Scroll Direction to horizontal. 6. Switch to the Collection View Cell and set its background color to red. 7. Within CategoryRow.swift, implement the Collection View DataSource method numberOfItemsInSection. For now, hard-code 12 videos per genre.

Maintaining visible scroll position while inserting items in a , Playground.swift This is the important part: the collection view will always let the layout know about If we have a cached topmost index path, use it. Note: The code uses “LiquidLayoutDelegate“, which contains a method for computing the height, given the index path. This delegate is usually the view controller, that has access and knowledge about all the current items in the collection. That’s all you need in order to layout a collection view with flexible cell sizes, in Swift.

Scroll UICollectionView automatically in Swift 3, When you show banners in UICollectionView and you want to scroll it can also scroll UICollectionView automatically in a vertical position. The collection view uses this information internally to configure its scroll view’s content size. prepare() : Whenever a layout operation is about to take place, UIKit calls this method. It’s your opportunity to prepare and perform any calculations required to determine the collection view’s size and the positions of the items.

Xamarin.Forms CollectionView Scrolling, CollectionView defines two ScrollTo methods, that scroll items into view. One of the overloads scrolls the item at the specified index into view,� The collection view’s delegate can override the default size values. Footer Size. The default size of footer views. The layout object uses only the dimension that does not match the current scrolling direction. For example, for a vertically scrolling collection view, the layout sets only the width of the footer to the specified value.

Comments
  • It seems like there is a problem with calling scrollCollectionView. Where are you calling this method from?
  • just after my collection view is ready
  • It would be helpful if you post your code where you create, prepare, and ultimately add your collection view for us to see.
  • how to pass my particular indexpath to (item: indexNumber, section: sectionNumber)
  • What do you mean by your indexPath? Isn't the above code doing the same?
  • "animated: false" was the key for me
  • It's worked for me at viewDidLayoutSubview but every time i am trying to swipe left or right it's let me back to the same index
  • Can't remember the details off hand, but Is your collection view data populated properly? And have you implemented the appropriate delegate methods?
  • what should i use in "(item: yourIndex, section: yourSection)" in order to focus a particular cell?