Uitableview scrolling performance. Mask layers are somewhat faster.

Uitableview scrolling performance Also, my scroll is fast enough but it 'kind of trembles' while I scroll it. Factors that affect the smoothness of uitableview scrolling 1, in the agent method to do too much computation takes up the UI thread time2. This can lead to a poor user experience. Below, we will explore the underlying causes and provide practical solutions to enhance TableView performance. The loading of a pandas data frame to the table is fast because I used a custom model implementation of QAbstractTableModel, but the resizing of the QTableView widget is incredibly slow. ) Jan 23, 2024 · In iOS, do not set UITableViewCell forecast line, under the condition of high priority calls “tableView: heightForRowAtIndexPath:” method, and obtain the height of each Cell will display, to determine the layout of the UITableView, Actually is to get the contentSize (UITableView inherited from UIScrollView, only get the scroll area, to May 6, 2014 · UITableView scrolling performance Asked 10 years, 9 months ago Modified 10 years, 9 months ago Viewed 1k times Apr 22, 2010 · Now I wonder if it matters to scrolling performance a lot, if outside the UITableView there are views with alpha 0. How I can improve the scrolling performance? I am posting my code here: Aug 31, 2024 · Learn how to optimize UITableView performance with efficient cell reuse and preloading techniques for smoother scrolling and enhanced user experience. The custom cell has an image with lot of details. Mask layers are somewhat faster. The pickers are in the cells underneath their corresponding value cell and are hidden away unti Apr 7, 2010 · Details: I had a tableview full of cells with two labels and a custom toggle switch control I put together from scratch. I would have thought that turning scrolling off in the table view cell's UITextview would have improved overall table scrolling performance if anything. Maybe I should look after an alternative for QTableView? Sep 30, 2009 · The scrolling performance in the table was horrible! My first thought was that it had to do with the background view I added to the custom table cell view for colouring the table cell background. May 19, 2021 · If the number of rows is under 20, while the others are hidden, performance is reasonable. In a table view, scrolling is smoother (if you get your UITableView code right). What can I do to make the resizing and scrolling smoother? On fast scroll tableview scrolling performance is not smooth and last cell in the tableview is getting cropped. This guide provides strategies to improve its scrolling performance, allowing for a smoother user experience even with high row counts. I tried to create a minimal example from scratch leaving out most of the cel Mar 3, 2013 · I have a UITableView where each cell contain some subviews and it works fine and all. Learn how to optimize cell configuration using background threading and batch UI updates for a smoother The result is a UITableView with terrible scrolling performance, as shown in this video: (Note: It is difficult to demonstrate the problem in the above in-line gif due to its low framerate. To further improve your table view performance, see the question Tricks for improving iPhone UITableView scrolling performance? JavaFX TableView is a powerful component for displaying data in a tabular format, but it can experience performance issues when dealing with large datasets. Allocating new views/layers will also slow down your scrolling--reuse them wherever you can (creating a UITableViewCell subclass that creates the subviews in init and destroys them in dealloc generally works Feb 3, 2016 · Conclusion Populating UITableViewCells asynchronously ensures that your UITableView scrolling performance is decoupled from your data model performance. I read that maybe you can subclass UITableViewCell and that could help performance, but I'm not sure on how to that or implement another solution that would fix the issue. You can configure a table to display a single long list of rows, or you Apr 11, 2011 · I have a UITableView with custom cells that were defined in the xib file, and am experiencing poor scrolling performance (choppy) on my device when the cells have a UISegmentedControl on them. May 31, 2021 · Hello, I have a table view with one row, when I insert large text doesn't show up a scroll bar even if it is enable and print some dots. Is this a performance hit in itself? Id appreciate any tips on how to find insights from time profiler and improve scroll performance. visibleCells at tableview , it is no wonder that this is your display As much as the impact is on. However, with the toggle control shown, scrolling was painfully choppy / slow on the iPhone 3G. It is only when I have upwards of 8 cells on screen at once that performance drops. I initially ha Apr 5, 2012 · First of all I am getting memory leak while scrolling tableview out of bounds. For example, the Contacts app displays the name of each contact in a separate row, and the main page of the Settings app displays the available groups of settings. "Baking" the corners into the content (as an image or using a clipping path in your drawRect:) is faster still. I really li Apr 9, 2010 · When implementing a table view cell, there's a tension between optimal scrolling performance and optimal edit/reordering performance. The picture in the cell eats the GPU (in tableview:cellforrowatindexpath: )3. I use the QTableView. There are approximately 500 rows in the UITableView. You should typically use subviews in the cell's content view. Discover effective strategies to eliminate `UITableView` lag in your iOS applications. Dec 31, 2016 · 8 I have a program that loads a profile from a csv file and displays the data in a table. ScrollViewDidScroll is called hell a lot if you are then calling . The new 2DScrollable makes it really easy, and The TwoDimensionalScrollable performance in release mode is unbelievably good. Tags: ios objective-c uitableview I have a UITableView that contains more than 20 rows, each UITableViewCell contains a UITextView which I can set different UIFont, alignment and colour. For the JDK 8b251 version I mentioned, scrolling performance for 1,000 rows or 10,000,000 is the same (excellent). In device scroll the tableview its lagging how to increase the performance as well as fast scrolling in UITableview. On the iPad 2, I got 56-59fps smooth scrolling animation. To insert items I do: QStandardItem* vSItem = new QStandardItem(); vSItem->setText("Blabla"); mModel->setItem(row, column, vSItem); where mModel is QStandardItemModel. But after nearly an hour of debugging through the code I still couldn’t find anything wrong. NSLog scroll objective-c uitableview iphone I am trying to measure the scrolling performance for my UITableView, between using subview and drawing the view myself. It is constructed from a UITableView that uses a custom UITableViewCell which dis Jul 11, 2014 · How to improve UITableView scrolling performance? What I am I missing? Asked 10 years, 7 months ago Modified 10 years, 7 months ago Viewed 1k times Mar 29, 2023 · The major TableView scrolling performance issue with large datasets started in JavaFX version 18. When the user scrolls through the content, the OS continuously calculates the coordinates of a view, even if it’s outside of the screen. Unfortunately, the performance is horrendous, scrolling is just way too choppy. Jan 25, 2017 · In this post we examined some common tips to achieve smooth scrolling for both UITableView and UICollectionView. Apr 28, 2014 · I have a static UITableView which uses inline pickers to allow the user to change various properties. . As we scroll the UITableView, cells are recreated and tableView: cellForRowAtIndexPath: gets ca Feb 15, 2014 · In this situation, I can give you the best advice when you - (NSArray *) visibleCells < Call on / code> on tableView , then understand properly. From my experience, tableView scroll speed depends on distance between dragged cell and content origin/end points. The cells are reus Aug 8, 2011 · I've a UITableView and each UITableViewCell displays a unique UIImage which is fetched from internet. Please click the gif or follow the video link to see a full framerate HTML5 video demonstration of the problem. Apple's tableViewSuite sample code example #5 shows how to do this, but I'm having trouble finding out how to make this work for my project. In my application, I download a JSON file off of the internet and fill up a UITableView with items from the file. After optimized the table view loading and scrolling, I tested the App (same code & same UI) on both iPad 2 and iPhone 4S. Save choiceforyou/8749176 to your computer and use it in GitHub Desktop. The same issue as here. I hid the 3 DOFavoriteButtons and my scrolling performance was silky smooth. 0 I have created an custom cell in UITableview and its work fine for simulator as well as device. May 27, 2013 · UITableView with UIImageViews showing large UIImages - Scrolling Performance Asked 12 years, 5 months ago Modified 12 years, 5 months ago Viewed 547 times Oct 22, 2013 · I have a UItableViewCell that I am creating programmatically inside tableView:CellForRowAtIndexpath that is suffering from poor performance after you have been scrolling for a while. As we may know about scrolling performance, there are a couple of famous arti I had a tableview full of cells with two labels and a custom toggle switch control I put together from scratch. Jun 10, 2019 · A UITableView instead reuses its subviews, needing fewer. Jun 14, 2025 · Let’s break down key performance tips, common mistakes, and how to achieve smooth scrolling with heavy content. 5? When a table view scrolls, is the entire screen affected with compositing and drawing, or only the frame of the table view? Dec 31, 2021 · UITableView scrolling performance problem Asked 3 years, 3 months ago Modified 3 years, 3 months ago Viewed 225 times May 1, 2020 · This tool absolutely doesn’t make sense with fixed row height of the UITableView, but if your context requires dynamic height of cells for some reason, you may get choppy scrolling very easily. Each row in the table contains one piece of your app’s content. If I hid the toggle control, the tableview scrolled like a champ. But my scrolling is jumpy. Everything is fine if I have not to many rows, but when I am trying to visualize big data (about 3000 rows), then it is extremely slow (20 seconds on Win 7 64 Jan 15, 2016 · Since the upgrade to iOS 9, code that has been working fine before started to show really bad performance on scrolling. Nov 22, 2011 · I am having UItableview with the custom cell. Jul 24, 2010 · Rounded corners slow down drawing a lot. Nov 13, 2017 · UITableView is one of the most used classes in UIKIT, it provides lots of features out-of-the-box and is extremely versatile: from list-type controllers, to screens you would never guess are… Jul 27, 2012 · I want to disable the text view's scrolling but when I set it (scrollEnabled = NO) the table's scrolling behavior is just horrible - rather than smooth scrolling it is jumpy and jerky. For example, continuously running animations inside a lazily loaded list can lead to Mar 31, 2018 · Also, each tableview cell contains an image and a collectionView that can have up to 4 images downloaded. All the updates are happening in tableView (_ tableView: UITableView, didUpdateFocusIn context: UITableViewFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator). Increase and Optimize UITableView Performance In this chapter, you will do the following: Use the benchmark tools you saw in Chapter 2 in a real example. scroll objective-c uitableview iphone I am trying to measure the scrolling performance for my UITableView, between using subview and drawing the view myself. My tableview cells have no transparent components (other than the mask for the layer) and I'm reusing cells. I had a UITableViewCell with 3 DOFavoriteButtons and some UILabels yet my scrolling performance was abysmal. Can someone give me Slow scrolling in JavaFX's TableView is a common issue, particularly when dealing with large datasets or complex cell rendering. Work step by step with an example of scrolling performance optimization. Overview Table views in iOS display rows of vertically scrolling content in a single column. When I scroll down or up there is a choppy or lagging during the scrolling, when I remove the font and text colours and alignment everything become perfect. Jan 10, 2012 · I have a scrolling grid of photos that looks and functions pretty much exactly like the photo picker on the iPhone. Apr 1, 2014 · I have a UITableView that contains more than 20 rows, each UITableViewCell contains a UITextView which I can set different UIFont, alignment and colour. May 24, 2014 · Problem Statement:Scrolling with the Custom UITableViewCell is not smooth with these UIImages and UIButtons added as subviews. We also presented some specific tips that apply to each specific collection type. This led me to believe, that the underlying data structure doesn't necessarily cause the slow performance of QTableView. I have a table with 3000 rows and 8 columns. So to increase scroll speed, you don't need to subclass UITableView. It is definitely the appearance of the cells, because if I scroll the UITableView quickly in a small size class, I get smooth performance. When I scroll down or up there is a choppy or May 27, 2010 · What makes scrolling so choppy on the UITableView when images are loaded? Is it because they need to be added as subviews? Or is it because images need to be cached? Both? Oct 10, 2012 · The problem I got is so weird. Use techniques to optimize UITableView performance. Nov 13, 2025 · Am I doing something dramatically wrong that I am not noticing? Is there a limit for the number of items that should be added to a custom cell to prevent slow scrolling? Is there a way to detect the reason of slow scrolling by using something like Product->Profile in Xcode? Can anyone suggest a solution for my problem? Feb 3, 2016 · Conclusion Populating UITableViewCells asynchronously ensures that your UITableView scrolling performance is decoupled from your data model performance. It does work well, and there are no problems or errors, but the scrolling performan I am trying to measure the scrolling performance for my UITableView, between using subview and drawing the view myself. Oct 31, 2024 · Using complex views or animations inside lazy stacks can degrade performance, especially during scrolling. Complex organization of view in CellOn the 1th, the first thing to understand TableView agent (here refers to DataSource and delegate of the method, the same) method of the call Tags: ios objective-c uitableview I have a UITableView that contains more than 20 rows, each UITableViewCell contains a UITextView which I can set different UIFont, alignment and colour. This takes resources and consumes the battery faster. I am building a UITableView based Twitter like App. Jan 23, 2024 · In iOS, do not set UITableViewCell forecast line, under the condition of high priority calls “tableView: heightForRowAtIndexPath:” method, and obtain the height of each Cell will display, to determine the layout of the UITableView, Actually is to get the contentSize (UITableView inherited from UIScrollView, only get the scroll area, to Oct 26, 2010 · I'm hoping this will improve scrolling performance. But on the iPhone 4S, I got only 43-49fps scrolling animation, which is awful. I have tried tables with 100000 rows and 200 columns, and it felt like working in a native desktop app. uwvdzljm bvmsn xhvhl bvlqo rmnba xmtsnm xeaxu wetlinx ljgeof tbkhl byevu jokcgc vcjzhhq kit jswyub