Uicollectionview reloaddata not working swift 4. If you don't go into more details your not going to get anyone to help you. collectionView reloadData Dec 12, 2018 · Have a good weekend and thanks again. Feb 1, 2016 · I need to know when reloading a UICollectionView has completed in order to configure cells afterwards (because I am not the data source for the cells - other wise would have done it already) I've tried code such as [self. g. I confirmed this in following environment - Xcode 12. Questions: I would like to scroll the UICollectionView to the bottom so the last item is in the print. It seems that reloadData () doesn't always work or work as expected. But what about animation? ReloadData method is invalidating the current items provided by data Aug 9, 2015 · How do I know that the UICollectionView has been loaded completely? I'm trying to reproduce this solution in Swift, but I'm having trouble reading the Obj-C. UICollectionView reloadData () does not work Solution 1: Solution 2: Solution 3: Analysis of the reasons: Solution 3 is to force the collection view to change, which is suitable for some areas where the visible area has not changed and thus fail My problem is: In order to update the Header text, I have to call uicollectionView. the way to do that is to start splitting the problems. override func collectionView(_ collectionView: You can't update UI elements in a background thread. I encountered a similar effect and for me worked [collectionView. Here's a basic usage: // Assuming you have a UICollectionView instance called `collectionView` // Update your data source // For example, if Explore the potential reasons behind why the reloadData () function might not work correctly after deleting cells in a UICollectionView using iOS and Swift. insertItems(at:) works where . Feb 4, 2020 · I have used UICollectionViewController and I'm trying to add images to my collection view cell but UICollectionView method is not being called. removeFromSuperView (). I encountered a similar effect and for me worked [collectionView. What else can we try? Surprisingly UICollectionView. collectionView. async, invalidating the collectionView, removing the deleteSections function and accessing the specific cell and removing it using cell. S. i just needed to put collectionView. Can someone help? Explore the potential reasons behind why the reloadData () function might not work correctly after deleting cells in a UICollectionView using iOS and Swift. collectionViewLayout invalidateLayout] before [collectionView reloadData]. Dec 12, 2018 · The idea is, that you take the width of the collectionview, divide that value by the number of columns you wish to display and than substract the spaces between each column. You obviously want to keep the current offset after the rotation, just imagine you scroll through your Facebook feed, rotate your device and the feed starts UICollectionView reloadData not workingIts getting called in viewDidLoad, after fetching the data used. wrapperView. An object that manages an ordered collection of data items and presents them using customizable layouts. How come collectionView cellForItemAt is not being called? I see that my collectionView numberOfItemsInSection method, and collectionView sizeForItemAt methods get called. Jun 20, 2018 · Why scrollToItem isn't working in my CollectionView? I want to work scrollToItem on EnabledID. for example, replace user. getListMuscle with explicit 1 muscle object. collectionView Feb 4, 2015 · I'm trying to add UICollectionView to ViewController, and I need to have 3 cells 'per row' without blank space between cells (it should look like a grid). Discover how to resolve unexpected behaviors in iOS Collection Views when reloading data using Swift. This means the data source methods like numberOfItemsInSection and cellForItemAt will be called again to fetch the latest data. So, what could be wrong here? P. Find solutions and learn more about UICollectionView and the reloaddata tag. Jun 15, 2021 · This is a very very weird bug that happens when you use PDFView in the UICollectionViewCell. Often users can update this list by using Pull-to-Refresh technique or by pressing the update button. Learn the proper methods to manage cell states effectiv I'm also clearly not understanding how to match up the items in the datasource e. you need to get to the point that something IS WORKING and then start testing the change one by one (not the opposite) Nov 4, 2021 · A self?. Also try keeping a reference to the old contentOffset (before the reload) and set it after the reload with . collectionView reloadData]; [self configure cells]; // BOOM! cells are nil I've also tried using [self. reloadData () and whenever I do that, the UIImageView that I drew in the cell (the correctCircle) gets moved to another cell! Mar 13, 2019 · Most of our apps present lists or grids of some data by using UITableView or UICollectionView. I obviously want to keep reloadData () to a minimum because if the user is viewing the VC in question, the cells jump around the place when they are updated. So what's a problem and how fixed it? Code: var dataArray = NSMutableArray() // dataArray is has a dat Dec 12, 2018 · Have a good weekend and thanks again. collectionView [IndexPath]. The height of each cell will be set according to your desires. You say they do not work but provide no more details. After some print debugging it looks like Jun 20, 2018 · Why scrollToItem isn't working in my CollectionView? I want to work scrollToItem on EnabledID. if _queue doesn't happen to be processed by the main thread, you will get unpredictable results in the collectionView and more likely crashes. collectionView reloadData] is called from parseRss which is itself called form parseFeed which is called by an operation on _queue. 6) UICollectionView. setContentOffset(oldContentOffset, animated: false). Cell width should be one third of screen s EDIT (Solution): ok so the problem was that i wasn't reloading the data after i fetched images from firebase. collectionView performBatchUpdates:^{ [self. Jul 12, 2018 · I'm very new to Swift, and have googled for hours (and read plenty of StackOverflow articles), and cannot seem to find the correct answer to this question. 5 iPhone SE 2020 (iOS 14. May 25, 2018 · There are several answers now providing the basics of how to refresh the UICollectionView. When I add the code below to updateUIView, the scrolling sometimes stops until another favorite dish isn't added/removed: UICollectionView reloadData not workingIts getting called in viewDidLoad, after fetching the data used. After some print debugging it looks like When you call reloadData () on a UICollectionView, it triggers a reload of all the items and sections in the collection view. reloadData () in the functions where i fetch data. contentView. reloadData() calls are not reliably working when PDFView is added as a subview inside UICollectionViewCell. Feb 11, 2022 · If the user scrolls main collection view after making item favorite, the app could crash (or could not). Unfortunately Safari on iOS supports neither WebRTC nor Flash so Twilio Client cannot work within any browser on iOS. In my case the collectionview-viewcontroller (obj-c) is a child-viewcontroller of a swift-viewcontroller. [self. Jul 4, 2019 · I tried to use reloadData, doing it in the Dispatch. You should dispatch your call to [self. animalCollection [Index] to the items in the UICollectionView e. Everybody knows how to update UITableView by calling the reloadData method on the tableView instance. So what's a problem and how fixed it? Code: var dataArray = NSMutableArray() // dataArray is has a dat Sep 28, 2019 · you need to debug you code. After some print debugging it looks like How to add header and footer view of UICollectionView in Swift I have added the delegate function in the controller class but it won't called at the run time. layoutIfNeeded() right after the reloadData might work. main. So the problem lies outside the code you have provided. wheo 52 ueemgt hpr ywt s62c cva3gy do1 z6wc xpmrvt