Uicollectionview not scrolling smoothly ios; swift; uicollectionview; Share. If I continue scrolling it's fine and goes into the safe area and below the screen. If #1 did not help, then it is because when page is first laid out, the CollectionView was not marked as needing to scroll. Now we come to the part as to how they have managed the infinite flow, and trust me my friend, it took me UICollectionView not able to scroll to see the entire last row. width) } My UICollectionView does not scroll smoothly using Swift. I've been trying to do this with a I have a vertically-scrolling scroll view that has a single subview. Setting the height of the UICollectionView to 3000 will make your scrolling problem worse. That means not only the active scrolling issued by the user, but also scrolling The issue I'm having is when scrolling for the first time screen loaded it has bug in scroll animation: After this bug happens, then scroll becomes smooth. Please set the collectionview estimate size Automatic into None. 1 1 1 silver badge. Hot Network Questions How can the bad guys follow the PCs over a The scrolling on my UICollectionView is really choppy. Here's a screen shot: Here's the a storyboard snippet: EDIT 1: Constraints: UICollectionView is not scrolling smooth on reload data. If i remove all the UILabels, it scrolls smoothly. Hot Network Questions How to see material properties It is not scrolling smooth, and it looks like the lag is caused by [UICollectionView _updateVisibleCellsNow] being called on each rendering loop. Follow edited May 26, 2014 at 16:15. The number of objects you want to instantiate will mean handling your own cache of visible objects that free themselves when they are not visible and allocate themselves before they do become visible. layer. Notice an inconsistent scrolling experience. This should be unnoticeable. It appears onscreen, complete with the correct data in the correct cells. Follow answered Mar 20, 2015 at 13:10. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer Observe that scrolling gets jumpy especially when it decelerates; If unable to reproduce, you should scroll up and down several times; Expected Behavior. Same for the second and the fifth, the third and the sixth Also don’t keep horizontal scroll position from portrait to landscape or opposite. Problem and Learnings. To improve the I have to scroll for precise merchandise in my assortment view, so I’m making an attempt: collectionView. Load 7 more related questions Show fewer related questions This UICollectionView is called topTabView and it uses tabCells. UICollectionView reloadData() crashes after emtying datasource I have a UICollectionView which shows a list of playlists and an image from one of the songs in the playlist. And in completion block set it to actual value. What is causing the initial bounce? It seems that it bounces off the top of the bottom safe area first, and then goes below the safe area fine if you continue scrolling. scrollViewDidScroll(_:) is indeed called each time the content offset changes. - It's not smooth at all and can be a pain to scroll through. userInitiated for that. Download Image Url Data in collectionView: UICollectionView, cellForItemAt indexPath: IndexPath delegate - ASYNCHRONOUSLY. scrollToItem(at: IndexPath(row: indexOfItem, part: 0), at: As for your scrolling issue, check that your scrolling is enabled, your constraints are setup correctly, and you don't have the problem mentioned at this link. . Issue with scrolling in CollectionViewController - Swift. It starts to get slower on scrolling and not smooth like in TableView. @walinaqvi It's more possible that the size of your images is too big to fit in a UICollectionView to scroll smoothly. 0 CollectionView in TableViewCell scroll isn't smooth in I'm having trouble to scrolling to bottom, I tried other solutions but with no success. Here is the code of my cellForItemAtIndexPath: - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { AppDelegate *d = (AppDelegate *)[ This works but since the focus engine also moves my cell (scrolls it) I end up with animation which is not smooth, there is a "kick" at the end of it. Also, compare this to the Android project. And under this I have UICollectionView(), filled with restaurant Coupons. I have the images save to the a subdirectory in the documents directory so more can be added and removed. Don't use qos: . I need the scrolling to stop at the begining of a cell. What I tried, I tried to load google map in background and then update the cell in main UI thread but it crashes. My UICollectionView does not scroll smoothly using Swift. As others have already said, the UICollectionView can only scroll one direction using a flow layout. UICollectionView scrollToItemAtIndexPath not functioning properly in navigation controller. Is it possible to use UICollectionView to build a layout where each section can be independently scrolled? For example, imagine 20 rows of images, where each row could be scrolled independently horizontally to reveal more images offscreen (without scrolling other rows in the process); and the entire view could be scrolled vertically to reveal more rows. If you release the pinch gesture while scrolling, it just stops. Below is screenshot of fixed height & width output of CollectionView: . UICollectionView scrollToItemAtIndexPath doesn't work. When I remove 2nd card (and 2 cards total left!) animation is not smooth. I am using collection view in Xamarin and I don't know what reason the scrolling is not smooth. Ive checked every output from 'prepare' and there is never an offset or anything, it draws smoothly. x to 1 pixel more/less than it should. This is the reason why your scrolling is not smooth. After all kind of cells have been loaded at least once everything starts to scroll smoothly. UICollectionView is not scrolling smooth on reload data. I am using auto layout (my constraints don't log errors), and I am using the cornerRadius property (it's a messaging app). Adjusting UICollectionView scroll speed/sensitivity. After 3 days spend in it, I solved the smooth scroll issue in my project. What's happening. At the end on my scrollview i have a UICollectionView (embedded in my scrollview) in which i loads many data. 4 Collection view cell slow detect selected item in swift. try to animate with this and works perfectly func startScrolling(){ let co = collectionView. On the first scroll collection view noticeably lags as cells appear. Though when I scroll I feel a slight glitchy scroll but I don't know how to improve my code in order to make it run smoother. If the UICollectionView is 3000 pixels tall then it will only ever need to scroll if it has more than 3000 pixels worth of content in it. Hot Network Questions Weirdness with `\ifnum`: `\ifnum\curyear=2024` gives an error, I'm putting these into a UICollectionView as cells. Improved zooming algorythm. Remarks I'm not really sure what I'm doing wrong. centeredHorizontally, animated: false) but it is scrolling to wrong item. After a a little bit vertical scrolling happens, the collection view area is getting cut into two halves - upper section is scrollable, lower section is stuck. When this occurs I need it to bounce back to position when pulled. Better shrink it down to smaller than 50kb each pic. Swift: UICollectionView Header Disappear When Scrolling. With some added perspective from here in the future: I seem to get this issue under iOS 6 but not under iOS 7. 2 UICollectionView is not scrolling smooth on reload data. First cache the image Data with respect to key Image URL. It's simple enough: A UIView with a UICollectionView created programmatically, using UICollectionViewFlowLayout with one section, scrolling set to horizontal. So I created a UICollectionView and each cell contains an emoji (UILabel). If there is a need for scroll delegate methods in horizontal scrolling groups than a traditional approach with nested CollectionViews and FlowLayout / Custom layout is still needed. I'm building my first app in Swift. Now, scrolling performance is awful. As the ad UICollectionView scrolls up, it should gradually transform into a I notice that, normal implementation for UICollectionView + UISearchController, will not able to achieve smooth scrolling animation when hiding search bar. Logs says: Needs to scroll the top collectionView automatically while user scrolling the bottom UICollectionView. As you can see in the below video, when we scroll upward the page, it seems like "the page has slipped up suddenly". scrollToItem set animation speed. 3. That cell receives some properties and when one of those objects is set I perform some UI updates to the cell. I had to use a UICollectionView in order to reuse the multiple views displayed. how to achieve that kind of behaviour like Marquee to collectionView because I need index position value. And anything (another collection view with cells) below that is also stuck. What I use: func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) { pageControl. 1 UICollectionView scroll bug. Cells are not really complicated. Will be grateful for any help, many thanks. UICollectionView Horizontal Scroll after scrollToItemAtIndexPath: 5. g. 9 UIRefreshControl appears on top of collection view items instead of behind. contentOffset. The segue becomes butter smooth, however, scrolling is still bumpy 3. When i scroll, the application works fine, but if i continue to scroll, it start to lag and the shadow My UICollectionView does not scroll smoothly using Swift. If your data is static and you want a kind of circular behavior, you can do something like this: var dataSource = ["item 0", "item 1", "item 2"] func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return Int. It is not scrolling smooth, and it looks like the lag is caused by [UICollectionView _updateVisibleCellsNow] being called on each rendering loop. But it doesn't scroll---in fact it doesn't respond to user interaction at all. UICollectionViewCells won't load unless scrolling. UICollectionView. UICollectionView scroll glitchy/laggy. I implemented compiled binding and increased the Garbage collector size in android. horizontal collectionView. 2. Here is all the code that does something with that UIVisualEffectView the code:. Commented Sep 24, 2015 at 9:28 I have a UICollectionView in a static UITableView. 1 UICollectionView Scrolling is Very Choppy. 938 Xcode building for iOS Simulator, but linking in an object file built for iOS, for architecture 'arm64' 0 How to disable I notice that, normal implementation for UICollectionView + UISearchController, will not able to achieve smooth scrolling animation when hiding search bar. Smooth scrolling in UITableView and UICollectionView - Download as a PDF or view online for free. In turn, for collectionview - hundrends of new items are randomly added to collectionview, everything is freezing, including the contentoffset. I have a UIScrollView with some UIView's added in. Improve this answer. bottomSheetVC. When you lay your view out in story board, you can put your UICollectionView embedded in a UIScrollView. Repeat steps 4-5. I have a collection view that I populate dynamically. - FastScrollingCollectionView. I suspect there is more than one issue here since not only is the scrolling choppy, but the tabs I've just run in to a similar / the same issue after adding an item to a UICollectionView. I have commented out the codes for applying image. Unfortunately, I still have this issue after trying iOS 10's optimized collectionView. 7. row;//this will give you the indexPath for cell For again scroll bottom to top which move to index 0 When a user taps on a letter, the letter needs to be removed from the board. sectionInset = UIEdgeInsets(top: 20, left: 15, bottom: 20, I guess you can implement the datasource methods for UICollectionView. 0 SWIFT 2 - UICollectionView - slow scrolling. As I scroll past half the screen, it gets stuck for a moment and then proceeds. zero, collectionViewLayout: layout) layout. With paging enabled, the collection view scrolls the whole page, which is 2 cells at once, and then it stops. Everything works fine, but I wanna disable scrolling INSIDE the CollectionView, and allow to scroll in entire page - so when user scrolls in coupons, whole I have UICollectionView with horizontal scrolling and there are always 2 cells side-by-side per the entire screen. Let it scroll smooth. I'm using IGLiskit Here's the error: attempt to scroll to invalid index path Here's the code: f After a lot of R&D I have come up with an answer for you, and the answer is :-RSDayFlow which is developed using DayFlow I have gone through most of the part of it and I recommend, if you want to make calendar app, use the DayFlow Library, its good. Here is my implementation of zoom in/out : Default zooming lvl. Posted by u/UnusualBrit - 9 votes and 24 comments UIScrollViewDelegate only interacts with vertical scrolling groups. frame. testIndexPath=indexPath. Here is my code : - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath In this post we examined some common tips to achieve smooth scrolling for both UITableView and UICollectionView. Follow edited May 23, 2017 at 12:32. When i scroll the tableview the scroll isn't smoothly. Understanding Choppy Scrolling. This subview has a couple of collection views. You'll notice that Android scrolls better. use this class in place of ImageView and set the image paths to "ImageURL" property. rmaddy I have a UICollectionView, it runs as it should when I add fixed data to it, but if I reloaded it again (getting data from service) Not scrolling smooth on UICollectionViewController for large data loading. Half of the screen is filled by restaurant name, description, logo, atd. Hot Network Questions I have a UICollection which is implemented and works, however I cannot achieve the scrolling I want. 2,384 1 1 gold badge 21 21 silver badges 17 17 bronze badges. I've setup the delegate and datasource correctly, and it renders with no problem. x) / Int(scrollView. How can I make the scroll nice and smooth? My UICollectionView does not scroll smoothly using Swift. 1 like • 1,728 views. Is this there something I'm doing wrong or is this supposed to happen? //Test scrollToItem func collectionView(_ collectionView: So for tableView it works as expected (new lines are smoothly added at the beginning of the tableview, once, and contentoffset is also smoothly continuing to change). contentView. That way you can avoid the premature cell dequeuing problem and get smooth scrolling animation ;) Here is an example of scrolling to the right page (e. I'm trying to make the collectionView scroll to an indexPath in viewDidLoad. I mean that the things happening when you scroll with your finger happen programmatically. Hello guys! I have a collection view that displays images fetched form Firebase Storage. I have just created a UICollectionView in which The user can add images from their phone to the photo album feature in the app. imageimages are displaying but scrolling is not smooth and when i am trying to get back from another ViewController its taking too much time to load the view. AFAIK the also should not set the contentSize directly, instead you need to Scrolling though UICollectionVIew is not smooth. I expect that you use this when you want to add UICollectionView displaying images to your app. Problem is probably you having big images, my code will remove stutter of scrolling, but it will not shorten the time necessary to load your image. The problem is <layer-list> drawable set in the background of item_user. 0 CollectionView lag while scrolling. We also presented some specific tips that apply to each specific collection type. I need any possible solution to this issue. This can be caused either by the dynamic IsVisible property, or by layout occurring before DataSource had any contents. The problem is that the pan/scrolling gesture is working just for the scroll view and it doesn't propagate to the collection views. This solution provides a smooth user interaction as it capitalises on UICollectionView’s default scroll mechanism. CollectionView in TableViewCell scroll Running this on a simulator it works, but if any scrolling takes place it causes this crash *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: UICollectionView is not scrolling smooth on reload data. Horizontal scrolling groups do not communicate with the collection view's scroll delegate. Each UITableView cell functions as the delegate and data source for its collectionView. 1 UIcollectionview lagging while scrolling cells. Dennis Dennis My UICollectionView does not scroll smoothly using Swift. Keep in mind, I have found the solution to jerky scrolling for UICollectionView with many labels dynamically set. Hot Network Questions I'm making a horizontal picker by using a UICollectionView. There are several methods that will notify you when a collection view gets scrolled, all of them are contained in UIScrollViewDelegate, and thus in UICollectionViewDelegate protocol, which inherits from the former. Under below picture you can see;. scrollToItem works when the direction of the collectionview is vertical but doesn't when direction is horizontal. it follows the concept of lazy loading. xml file so it takes GPU time for rendering that's why scrolling not smooth. UICollectionView: Smooth scrolling with many visible cells. I'm trying to implement a I'd consider myself advanced in getting smooth scrolling performance, but this has stumped me. Apple’s SDK provides two components There's no easy fix without UICollectionView. scrollToItem(at: IndexPath(row: indexOfItem, section: 0), at: . However you can accomplish this very easily without creating a custom layout or using a third party library. Hot Network Questions Dutch Public Transportation Electronic Payment Options UICollectionView, scrolling to an Item without knowing its NSIndexPath. View The ScreenShot. I have a UICollectionView in my ViewController. It doesn't crash, and playback is smooth; the only problem, horrible scrolling: I have a UICollectionView within a UIViewController with paging enabled. Instead of using labels I draw all NSStrings using drawLabel method described by Miroslav Hudak in this post: How to change color of NSString in drawAtPoint. I load photos in that collection view. When cells are supposed to move by animation under 6 they often leave copies behind; when scrolling if I add code The UICollectionView disables scrolling by default when there is not enough cells in the view. But it's not scrolling smoothy. 4. Emojis are in a plist file, I open it in viewDidLoad; I'm using a xib cell file for my UICollectionViewCell (since there is no other way I am getting list of data need to show at bottom like new tricker in iOS automatic smooth and continuous Scrolling. The UICollectionView's default scrolling has deceleration if you let go while scrolling, and also smoothly bounces the content back when you scroll outside of it. can you guys please help me to fix this. To disable automatic scrolling of a UICollectionView when focus changes, just disable scrolling in the 'Scroll View' properties for the 4) Lastly, even though it's not mentioned in my post, UITableView has no scrolling issue with 5,000 section. As you can see in the below I use UICollectionView and UICollectionViewLayout smoothly, but when I scroll things start to get strange. Now I would like cell to be Centre on screen after scroll! Option 1: Option 2: What would I have to do achieve option 2? UPDATE: In the end I have used following code as scrolling with other answer is not smooth. CollectionView lag while scrolling. Maximelc. Hi i am making iOS application where i am using UICollectionView to show date and time and at the bottom i am showing xib view but problem is when i am using addSubview(self. UICollectionView is designed to reuse it cells so just this itself implies Tick on ‘Scrolling Enabled’ and if you want to scroll only in one direction each time tick on ‘Direction Lock Enabled’. But unfortunately, it's not working smoothly with dynamic width & height of Row & Column. EGOImageLoading I have around 14 items in my collectionView and the scrolling is not smooth at all. I have a problem. I checked Vertical Scroll direction in UICollectionView but is still not scrolling. CollectionView issue after scrolling to first item. Good luck! I am using UICollectionView with NSFetchResultsController to present the different sets of photos. Better use . You should set it to the height of the view it is contained in (same as the width). delegate = self This should be the accepted answer b/c OP asked "scrolling has stopped" -- without both methods in place the user can easily scroll the collection view down and release finger without flicking and scrollViewDidEndDecelerating will NOT get called, scrollViewDidEndDragging does. UICollectionView scroll bug. Rotate phone to horizontal screen orientation. UICollectionViewCell changes data as soon as scrolling begins. Here is a picture of my UICollectionView, I have resized the grey cell to 250 by 250. Hot Network Questions Also, a few observations that don't necessarily impact the performance but may improve your code: 1. UICollectionView Scrolling is Very Choppy. I am using the lastest IOS Swift. This approach allows users to continuously scroll through content without the need for pagination, making it feel like an endless stream of information. For this tutorial, we won’t delve into the details of setting up the project I need to scroll for exact item in my collection view, so I am trying: collectionView. scrollDirection = . Link to public reproduction project repository It's actually not that easy (but possible) to get it smooth, but I hope that this sets a starting point for your version to improve. 1 CollectionView issue after scrolling to first item. 0 2 UICollectionView is not scrolling smooth on reload data. I am creating 7 cells using UICollectionview. EDIT. Finally, open the Connections Inspector and connect the UICollectionView referencing outlet to your UIViewController. We also presented some I notice that, normal implementation for UICollectionView + UISearchController, will not able to achieve smooth scrolling animation when hiding search bar. These aren't handled at all currently. below is my code. Q: Why do you even use XIBs for that, why not prototype cells in a storyboard? I'm using UICollectionView to show grid based View in iPad. Strategies to achieve Smooth Scrolling: Visible lag while scrolling two way scrolling UICollectionView with large number of cells (250,000 or more) 0 View updates too late in Collection View after scrolling. You are correct that UICollectionView can manage the scrolling and do not need a UIScrollView. 1 UICollectionview Smooth Scrolling in UITableView and UICollectionView As most iOS developers know, displaying sets of data is a rather common task in building a mobile app. so when we do that like this: lazy var snapCollectionView: UICollectionView = { let layout = UICollectionViewFlowLayout() let collectionView = UICollectionView(frame: CGRect. Scrolling is not perfect. Follow edited Oct 25, 2018 at 13:15. AI-enhanced description my CollectionView's items do not scroll, when I scroll down the first items stay at their place, without any change, you can see what I mean on the image: collectionview Here is the code of the collectionView: func setUpCollectionView() { let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout() layout. Here's a gif of what it looks like: Problem. Scrolling should be perfect to meet production standards. UICollectionViewController - Over-scrolling / No vertical scrolling issue. Also top side first cell always stays on top when scrolling ( Left side cell must be always stay right now no problem there , but top side cell must be scroll when scrolling ) UICollectionView with optimized smooth scrolling and improved performance. My cell first starts off on the far left, but notice what happens if I start to scroll horizontally. Yes, the reason is because AutoLayout sucks. 1 UICollectionView jumpy scrolling. Im am aware of a hack where I can fill the UICollectionView with empty tables to enable scrolling but I was hoping there would be a slightly more fluid example as I am using UICollectionView in my UIViewController. iOS Horizontal CollectionView not UICollectionView scrolling not smooth when using NSFetchResultsController. 673 iOS app with framework crashed on device, dyld: Library not loaded, Xcode 6 Beta. Download the data in separate thread in background use either GCD or NSOperation queue. currentPage = Int(scrollView. I create 1 demo Project like Gaana Application and for that i have added UICollectionView inside multiple UITableViewCell and it works fine but when i scroll UITableView, UITableView not scrolling smoothly. What i want is keep a smooth scroll when the user scrolls to the bottom of the parent scrollview and As a result when you keep adding messages after 3, collectionView won't scroll because its contentSize is still less than its frame so scroll to item won't have any effect, but when continue adding messages and when you enter 8th message finally content size is greater than the collection view frame hence it scrolls. What I'm trying to get is a nice smooth scroll initially without the weird bounce. Which basically duplicates the functionality of what UICollectionView already does. In viewDidLoad, I fetch the urlsStrings to the images from Here's my architecture. I've tried analyzing it using the Time Profiler instrument, and this was what I see when I scroll: UPDATE: I answered this myself; the code that produces perfectly smooth scrolling in a UICollectionView while playing multiple, simultaneous videos using AVPlayer The following code plays up to 10 AVPlayers at a time, each inside a collection view cell. Modified 4 years, 1 month ago. I have only 200 (20rows x 10 columns) cells at a time on screen, each cell contain one UILabel only. When designed completely, it does not scroll smoothly. I want them to scroll horizontally. No need to call cell. UICollectionView not scrolling when stat scrolling from UICollectionViewCell. With a large amount of data, scrolling must remain smooth. You need to add the protocol UICollectionViewDelegateFlowLayout to your ViewController and In this post we examined some common tips to achieve smooth scrolling for both UITableView and UICollectionView. Read on to I was hoping to see silky smooth scrolling with CollectionView since a lot of layouting and virtualization are native. But the photos loaded go beyond the height of the controller and there is no way to scroll up. I have created a UICollectionView programmatically that will be displayed within a larger UIView. My issue is, when I start scrolling, this is what happens. SWIFT 2 - UICollectionView - slow scrolling. Now my UICollectionView is scrolling smoothly :) There is one library to load images in the back ground. Improve this question. I'm not a fan of the accepted answer. This is the first time I am using both UICollectionView & NSFetchResultsController. I have RestaurantViewController. Ok, that works better! Two problems though: 1) My scroll to bottom method does not work in viewWillAppear: anymore - only in viewDidAppear: making the initial scrolling to Bottom (scrollToLastMessageAnimated:) visible to the user, which is unwanted. Thanks UICollectionView is not scrolling smooth on reload data. Any solution? I am going crazy :(refs to: Independent scrolling for each section of a UICollectionView? I want to implement a smooth transition where, as I scroll up, the ad UICollectionView gradually transforms into a UISearchBar. 0. Why do we Everything works as expected, but there are some performance issues. Lagging scrolling problem on UICollectionView. 2 Not scrolling smooth on UICollectionViewController for large data loading. In the following library there is "EGOImageView". – Currently my CollectionView with Horizontal Scrolling has a vertical layout for each section. Performance is OK for < 30 items, but at around 100 or more, its terribly slow. However, the scrolling appears to have a very bad performance, when scrolling up and down it is a bit shaky and not smoothly like it should - compared to the photo app from Apple. No matter cards are just yellow, you should look on scroll position and card disappearing animations only. 5 UICollectionView's prefetchItemsAt not being called. view) UICollectionView scroll view is not working. i am storing images as base64 NSData in database and getting from Database and display in UICollectionView cellForItemAtIndexPathas cell. It doesn't work because they are inside the scroll view. When scrolling programmatically, just set the end contentOffset. I made a clean project that produces the problem. If you happen to I built my own UICollectionView framework with a custom UICollectionViewFlowLayout for vertical card paging and creating a card stack effect. Its a subtle bug in CollectionView, that has been seen in other circumstances. I don't know if it comes from the UICollectionView of something else. Without this, there may be one or more "hiccups" ("stutters", brief pauses) the first time you scroll the list, while the needed images are fetched. Smooth scrolling In UICollectionView inside UICollectionViewCell. Load 7 more related questions Show fewer related questions if you did not use storyboard and all is done with programmatically. UIcollectionview lagging while scrolling cells. UICollectionView horizontal scroll not working properly. For some strange reason collectionView. bgImageView. Community Bot. NOTE: <Image HeightRequest="200" - if a fixed height works for your needs, this allows layout logic to determine item height before reading image source, which helps make scrolling smooth. If I just move items around screen (no scrolling) it works perfectly. answered May 30, 2013 at UICollectionView scrolling not smooth when using NSFetchResultsController. Haha, seriously something else probably is constrained to the collectionView, check either the orange or red arrow in the object bar on the left of the IB to find out what it is, or select the collection view and look at the constraints on the right inspector, under the ruler icon. In my iOS project I use a regular UICollectionView with a custom cell. This is not ideal because it negatively affects the user experience. – Any ideas on what would cause my view to 'jump' when dragging items around and page scrolling. if you use that your app scrolls smoothly. It was working just fine, then I added sections to show additional albums, using a different layout. I'm assuming it's sluggish cause the UICollectionView loads on You’ll add functionality to DataStore and EmojiViewController to enhance the scroll performance. I would like any recommendation on how to optimize the I have some horizontal UICollectionViewCell in my UICollectionView. CODE. 2) The translucent effect of the UICollectionView behind the UIToolBar and the keyboard is gone Both methods would work in the way that they are scrolling but have you an idea to let it scroll from item 1 to 2, to 3, to 4 and after 10 to 1 and that as a uniformly accelerated motion that happens endless. Have the scrollview set up to scroll horizontally and the I am trying to figure out how could I achieve smooth zooming inside UICollectionView, so far I've got first step - It's zooming in/out but without greater control on which value I would like to stop it. If I delete the last item, then the collection view's scroll position jumps to the N-1th item (doesn't smoothly animate), and then I see the Nth item (the one I My UICollectionView does not scroll smoothly using Swift. Since then, the scrolling performance became extremely choppy. class ThemeCardCell: UICollectionViewCell { private let priceTagEffectView = UIVisualEffectView() override func I have implemented an Appstore/Netflix like UI where there is a UITableView and inside each (custom) cell there is a UICollectionView scrolling horizontally. i am making app with CollectionView cells using Swift and i fetching posts from my WordPress Website, i want to show posts in CollectionView cell and i want to show full text in Label, but the problem is that when is show posts on CollectionView , scroll is not smooth and sometimes it just stop scrolling for some seconds, this is my code to fetch posts. UICollectionView does not scroll. The date cell's background color is changed Actually for me it works terrible for some reason on simulator but scroll is really smooth on the device. I think the reason is a big pictures in image attribute (from 300 to 500k). CollectionView images are loaded from Firebase. 5. Share. Not scrolling smooth on UICollectionViewController for large data loading. I actually tested with 10,000 sections, and scrolling is smooth. I can't have the board stop scrolling, it needs to continuously scroll. children is not called in cellForItem, and it is only called when user taps on the cell to trigger a segue. UICollectionView Doesn't Respond Until Scrolling Completely Stops. I want to scroll collectionView cells slowly ,Smoothly and automatically like marquee in swift 4. Hot Network Questions 1970's short story with the last garden on top of a skyscraper on a world covered in concrete UICollectionView scrolling not smooth when using NSFetchResultsController. If you need to set the UICollectionView scrolling Direction Horizental and you need to set cell width and height static. 0 UICollectionView Doesn't Respond Until Smooth scrolling in UITableView and UICollectionView. i can see there is no lag on scroll and my collection view is scrolling smoothly . Hot Network Questions. Collection view cells are moving, when scrolled within the main window before any vertical scrolling of the page. However, when I scroll up and down the collection view, it is very laggy. How do I improve? Thanks in advance! My UICollectionView does not scroll smoothly using Swift. Otherwise, you could scroll in both directions at the same time. UICollectionView jumpy scrolling. If the UICollectionView is 568 pixels tall then it will only ever need to scroll if it has more than 568 pixels worth of content in it. Any help will be appreciated. 3 UICollectionView scroll issue with paging enabled after tap. UICollectionView not updating. Create a Class. A simple item template containing an image and two I have setup an array to hold an image and two labels that set the data for the dynamic cells. It's not scrolling to position on startup, when I select an indexPath it scrolls to that position. UICollectionView scrolling performance decreases when reloadData. UICollectionView scrollToItemAtIndexPath: and get fresh cell position. The problem is that the view doesn't allow me to scroll to view the cells off screen. The user types in a movie title, I query omdb and parse the resulting json into cells. The profiling tool told me that the time gas been allocated for the collectionview reuse inside tableview cell. 3 UICollectionView doesn't scroll inside UITableViewCell. Ask Question Asked 11 years, 10 months ago. Only the initially displayed cells can be seen, and none of the To create a UICollectionView with sticky headers in both the horizontal rows and vertical columns. md Setting the height of the UICollectionView to size of UIView will make your scrolling problem disabled. Don't use <layer-list> If you prefer a standard UIViewController with a nested UINavigationBar and UITextView for scrolling content, you should consider using additional UIScrollViewDelegate methods like scrollViewWillBeginDragging(_:), scrollViewDidScroll(_:), and scrollViewDidScrollToTop(_:) to update largeTitleDisplayMode more often. In cellForItemAtIndexPath add this line after adding images to the imageview. Hot Network Questions UICollectionView is not scrolling smooth on reload data. From time to time, willDisplay cell will return the wrong page for the page control depending on users interaction. 1. If you then try to scroll the added item Currently, it flickers on scrolling, I need smooth scrolling and smooth loading of map. Card is disappear and after that scroll position jumps to the single card left. I don't know the reason for this slower scrolling performance. I'm building a custom keyboard, I'm trying to recreate the iOS emoji keyboard. Viewed 27k times Let it scroll smooth. My UICollectionView scrolling is not smooth. I'm not exactly sure how to do this. I used the If I delete an item that is not the last item, everything works as expected and a new item slides in from the right. So technically speaking, why should collection and table views behave so differently in this aspect? When it comes to creating a smooth and engaging user experience in mobile applications, infinite scrolling has become a popular technique, especially in UICollectionView. My collectionview properties are set as below. The tabCells are just vessels for a custom button class called TabButton. Here are my specific requirements: When scrolling up, the ad UICollectionView should move up together with the product UICollectionView. 0 Handle scrollview items in UICollectionViewCell (the cell is not appearing ) 0 UICollectionView The answers to other questions like Poor UICollectionView Scrolling Performance With UIImage might help. from page 1 I have implemented Row & Column based CollectionView and enabled it with customlayout of UICollectionView and it's working fine as expected with fixed width & height of Row & Column. The text in a cell does not update immediately. background for work that prepares data to be displayed on screen while the user is awaiting it. Alright, the culprit was following code, constraint and everything was set correctly, but when I update the constant of height constraint in viewWillLayoutSubviews, although the constant value gets updated, collection view scrolling stops working. Recently I spent some time optimizing the scrolling performance of a UICollectionView so that scrolling is now 60 fps (frames per sec) and buttery smooth (iPhone 5/6/6s) I followed some hints on a Ray Wenderlich tutorial which links to a very good WWDC 2012 video on iOS app performance: graphics & animations. uicollectionview; tvos; apple-tv; Share. Ideally I would like the following layout with horizontal scrolling: So my question is how can I have horizontal scrolling on my I have UICollectionView that contains cells with large images. – James. cornerRadius = 20 every time you dequeue a cell, better move that to I'm developing an iOS app that use UICollectionView to achieve a module like a normal calendar app. The issue seems to be that immediately following [collectionView reloadData] or [collectionView insertItemsAtIndexPaths: @[newItemIndexPath]], the collection view's content size is not yet updated. 2 UIRefreshControl endRefresh jumps when used with Large Title enabled. Actual Behavior. How can I fix this? I have also used Github Framework but it didn't help. CollectionView in TableViewCell scroll isn't smooth in swift3. If you insist on preloading, UICollectionView is not scrolling smooth on reload data. My problem is that if I scroll the horizontal list in the first cell to another position, the fourth cell will also be at that same position. Item. I have a UICollectionViewController that shows pictures from the camera roll. However, when I add to the array and reload the data in the collection view I cannot scroll The best bet for fast scrolling is no blending, no scaled images, no misaligned images, no shadows modulo what you can live with respect to design. Scrolling was smooth until I added (small) UIVisualEffectView to each cell. I've turned on slow animations in the end of the video to make it super easy to notice. You can achieve smooth scrolling by making sure your app meets the 60 frames per Hello I have working uicollectionview custom layout and i have issuesfor bottom padding and scrolling sizes. count } func collectionView(collectionView: I have a UICollectionView used to display images which I load from the filesystem. max // instead of returnin dataSource. How would I make this smoother? ios; uitableview; uicollectionview; Share. NSData My UICollectionView does not scroll smoothly using Swift. However, when I increase the number of cells in the view to the point that scrolling is necessary to see the last row, I find that the UICollectionView is not able to scroll to the bottom. Scroll to the back of the CollectionView; Swipe on the CollectionView from the left to right ends of the screen in an attempt to scroll; Notice a relatively smoothly experience. Collection view scroll items only. However, when displaying a very large amount of data, it could be very tricky to achieve a perfectly smooth scrolling. hvnd tyyh vwszb yjmm tcvhyxg mcq xrmfi dedqe luhuz bcdo