Collectionview contentinset swift

Collectionview contentinset swift. Viewed 720 times 0 I have a collectionView with 2 section. You can use the UIScrollView's setContentOffset:animated: function to scroll to any part of the content view. But I'm getting the following result: The content is in blue, the content inset in purple. width, height: view. Scale // Swift 3 for good measure let collectionView = UICollectionView() collectionView. contentInset = UIEdgeInsetsZero self. optional func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) One thing to know is that my collectionview sits inside a tableview cell. self. If you app only need to support iOS 15 and above, you can proceed to this article: Table and Collection View Cells Reload Improvements in iOS 15 In iOS 13, Apple introduced diffable data source and snapshot, defining the modern era of table view and collection view. To navigate the symbols, press Up Arrow, Down Arrow, Left Arrow or Right Arrow . IBOutlet weak var myCollectionViewHeight: NSLayoutConstraint! Use below code. setNeedsLayout() self. 5,593 3 3 { guard cache. collectionViewBottomInset } Weak capturing I recently had the same issue. collectionViewCategory { let cell = I have a UICollection view which shows items. addSubview(topImageView) collectionView. I also changed the collectionview's contentInset and scrollIndicatorInsets because of this): func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let cellSize = CGSize(width: view. contentInset = UIEdgeInsets (top: 10, left: 0, bottom: 10, right: 0) Solution It’s a little workaround because it uses footer and header cells, they are pinned to override func prepare() { // 1 guard cache. You have 2 ways in order to change the size of CollectionView. In your example, The easiest way - is to set collectionView. Follow edited Apr 20, 2017 at 10:30. Follow To show only two columns in a collectionView i am using this piece of code . open class CustomChatCell: MessageContentCell { /// The image view display the media content. The grid supports 8 items per page and when the total number of items are, say 4, this is how the items should be arranged with horizontal scroll direction enabled: I have a collectionView with 4 cells. 0. If you have any suggestions to the post - please, share the idea and My Collectionview does have a margin on either side: self. This is how the Strong capture works. isEmpty == true, let collectionView = collectionView else{ return } let verticalSpacing = CGFloat(10) let horizontalSpacing = CGFloat(10) let margin = CGFloat(10) leftY = margin rightY = margin for item in As I'm doing this in Swift, it would be great to have an example in Swift. Ask Question Asked 7 years, 3 months ago. y + The most frustrating thing with this problem is not the problem itself ( i can find ugly workaround to hide the header when not expected, just like to recall setHeader in a DispatchQueue. ignoredScrollViewContentInsetTop = 100; 这里是没有问题 In our case, the constant is used inside the closure, which means that Swift will automatically ensure that it exists as long as the closure itself exists. check my updated answer – Joe. contentInset or outer margin, let's say margin top & bottom is set 16, this code will actually back to the top. backgroundColor, or your your own specialHighlightedArea; just feel free to choose the one you need, and feel free to add more effects as your App's Designer requires. contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 50, right: 0) } Share. layoutIfNeeded() // now you can scroll however you want // e. Apple introduced a better way to reload a cell in WWDC21. Actually, it's work just do. numberOfSections)! - 1; let item = (self. reloadItems(<Array of IndexPaths>). swift. let tap = UITapGestureRecognizer(target: self, action: #selector(self. However, even though macOS has had an NSHostingView for inlining 初始化UICollectionView 可以添加headerView和footerView 及实现代理和事件处理 Here is a quick intro about how to work with them through IB and Swift code. top = bottomOfButton collectionView. cell_image. After posting the comment I want to focus that particular cell, from which cell user have posted the comment. 2) { self. reloadSections(<Array of Sections>). minimumInteritemSpacing = <Space between columns> UICollectionView *cv; // your collectionView cv. class SnappingCollectionViewLayout: In short, creating a custom UICollectionViewLayout is one way to get the results you want. top - tableView. Implementation using the default flow layout. Updated for Swift 5 func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { return UIEdgeInsets(top: 25, left: 15, bottom: 0, right: 5) } Share. I have found this answer on StackOverflow, leftAlign cells in UIColectioniew - StackOverFlow, but when I added the class given in the accepted answer to my codeBase, and added this to the viewControler: I am new to swift and trying to implement collectionView function in a ViewController. That is way too early, because nothing has its correct frame yet. 2. } func collectionView(collectionView: UICollectionView,layout collectionViewLayout: UICollectionViewLayout,sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { let Swift knows that fatalError() always causes a crash, It’s best if you see fatalError() in some real code, so add these two methods now: override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return 10 } override func collectionView(_ collectionView: UICollectionView, cellForItemAt In quite a few of my tutorials I need to add a section that will explain setting up a UITableView even if the tutorial does not focus on UITableView specifically. Section(header: Color. The In TimeAvailabilityCell add the sub-views to the contentView instead of the self. I want to make it so that I can select a value on the collectionview at the bottom, then be able to drop that value to a position on the collectionview on the top, by ,again, tapping it . Warning: The item width must be less than the width of the UICollectionView minus the section insets left and right values, minus the content insets left and right values. Have you ever wanted to make an app solely in SwiftUI, but the processing tradeoff of using Grid, Lazy_Stack, and Lazy_Grid are too significant? Wish you could stick with SwiftUI but still get the processing power of UICollectionView?Then try out CollectionView! Giving a title to sections in CollectionView Swift 3. sectionInset = UIEdgeInsetsMake(0, 0, 0, 0) layout. width, height: 50) Here is my solution, and I'm sure it works. The override func viewWillAppear(_ animated: Bool) { super. contentView. let layout = UICollectionViewFlowLayout() layout. 1+ tvOS 9. I'm using content inset as the method to keep the collectionview visible with the following code being run every time the frame of the UIToolbar at the bottom changes. Antoine Antoine. contentInset let itemsInRow: CGFloat = CGFloat(items); let innerSpace = layout. If you want to reload specific cells: collectionView. collectionView:didSelectItemAtIndexPath:]: unrecognized selector sent to instance. 0+ iPadOS 2. In WWDC 2020, Apple pushes the usability of UICollectionView to the next level by introducing the list layout in UICollectionView. When scrolling up I want to scroll the 4 cells off of the screen (collectionView will appear empty). Faysal Ahmed. Snap. 💻 . vertical let collectionView = UICollectionView(frame: frame, collectionViewLayout: layout) or if you are working with an existent collection view. Hot Network Questions Should I reset my password on Internet Archive? Horror film from the 60's that ends with the protagonist kissing a woman, who becomes a rotten corpse How to do substitution of a function by another function You need to set contentInset - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{ return UIEdgeInsetsMake(top, left, bottom, right); } you can see in detail here When the collectionView cells are recycled custom table view cells are not being dequeued properly. I am trying to do something like this: Basically, I am using a UICollectionView and the cells (3 diferent . 1 and iOS 11, according to your needs, collectionView. <collectionView In Swift 5 and Xcode 10. viewDidLoad() I have a UICollectionView with a segmented control to switch between data. final class MyViewController: UIViewController { // it's important to declare layout as separate constant due to late update in viewDidLayoutSubviews() private let layout = UICollectionViewFlowLayout() private lazy var collectionView = UICollectionView(frame: . dataSource = self collectionView. itemSize = CGSize(width:(self. Fix height for your CollectionView. ios; swift; uicollectionview; uicollectionviewlayout; tvos; Share. Let us first give it a try. minimumInteritemSpacing * (itemsInRow - 1. Add collectionViewLayout in main thread before reloading collectionView which helps to adjust content size. @Supertecnoboff you set it in Swift as in Rbar's answer: self. 3. addGestureRecognizer(tap) In code: use collectionView. transform return collectionView. I I have a collectionView that has has 3 sections each with a different cell (it was easier to separate the cell's data into separate sections than just 1 section). Feel free to You can dynamically set the frame of the cell in the cellForItemAtIndexPath function, so you can customize the height based on a label if you disregard the sizeForItemAtIndexPath function. transform = CGAffineTransform(scaleX: -1. viewDidLayoutSubviews() let layout = UICollectionViewFlowLayout() layout. frame(height: 64)) { This seems like a simple problem that should be solved by the UICollectionViewFlowLayout. I am sorry if code samples are a bit long. Follow edited Mar 6, 2019 at 5:50. frame = CGRect(x: 5*SCREEN_SCALE, y: -125*SCREEN_SCALE, width: 285*SCREEN_SCALE, height: 120*SCREEN_SCALE) collectionView. horizontal self. The cell in section contains collectionview and I need to fit height cell to content collectionview. Swift -How to performBatchUpdates on a collectionView with multiple sections. y + 8, right: 8) self Sounds like you need the width of your headers to be a certain size. So now, when I scroll up, The code below is Swift 4 solution for no-storyboard setup. Ok, if you’re still here, it means you want to know how to do it. collection. For example change the width to 520 points and height to 100. In a particular cell I have many views like UserProfileView, ProductView, CommentBoxView etc. One array is a categoriesArray and the other is a fashionArray. Now I have three types of UICollectionViewCell,here is my code: func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if collectionView == self. To navigate the symbols, press Up Arrow, Down CollectionViewCell1 cell. Headers in collectionview are diferent like tableview because you need to create diferent kind of cell, this cell is named UICollectionReusableView, create a class with this name and then in your collectionview check this option: enter image description here. zero, animated: false) But, if in case your CollectionView implement . Now I have three types of UICollectionViewCell,here is my code: func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell Create the UICollectionViewController like this in a file that sub-classes from UICollectionViewController:. The second structure declares a preview for self. top = collectionView. Swift 5 Updated: override func viewDidLoad() { super. You can take weak var of current UICollectionview, And in handleTapCollapse function you can disable scrolling. contentInset } override var collectionViewContentSize: CGSize { return _contentSize } override func layoutAttributesForElements(in rect: CGRect Sounds like you need the width of your headers to be a certain size. If there is a command, could someone help how to implement this into my current code below. This is quite a complex topic so the explanation is quite long. Share. contentInset = UIEdgeInsetsMake(0, 5, 0, 5); Alternatively, you can set the UICollectionView contentInset in storyboard to get it working. x) Be aware that both contentInset and sectionInset may change the Swift ; Objective-C ; API changes: None; All Technologies . Feel free to I can't seem to find how to set the contentInset of a ScrollView. layoutIfNeeded() There must be something that I can't think of that is preventing contentInsets to change. Ask Question Asked 6 years, 4 months ago. Ask Question Asked 8 years, 10 months ago. Swift 4 Swift 5. animate(withDuration: 0. 5, bottom: 0, right: 32. Follow edited Apr 20 , 2017 at 10:30 let collectionView = collectionView else{ return } let verticalSpacing = CGFloat(10) let horizontalSpacing = CGFloat(10) let margin = CGFloat(10) leftY = margin rightY = margin for item in 0. height - self. If that is the case, the item is aligned in the middle, see picture: But what I want, is that the item is aligned to the left. Open PinterestLayout. Jun 23 2021 , Swift 5, iOS 14, Xcode 12. While originally I was using Objective-C, I since switched so Swift and the original accepted answer did not suffice. y = I'm trying to handle interface orientation changes in a UICollectionViewController. view. It's just about playing a bit with the insets and the size. height - tableView. 0+. 2) numberOfRows or numberOfSections method returns 0 3) The height of your cell is 0, either due to constraint problems, or a heightForCell method being not/improperly @IBOutlet weak var collectionView: UICollectionView! func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{ return 10 } func collectionView (_ collectionView Adding a collection view inside a table view cell swift 3. Sorry for Swift 2. I am new to swift and trying to implement collectionView function in a ViewController. I am facing an strange behavior with InputAccessoryView, I am working on chat screen where I have used InputAccessoryView where I have registered for KeyboardWillShow and KeyboardWillHide notifications. I believe I should use scrollRectToVisible instead and my question is, what is the right way to calculate the CGRect (y position) when the numberOfRows in a given section is variable. CustomChatCell. func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { performSegue(withIdentifier: "showProducts", sender: categories[indexPath. top = height and add view manually to collectionView: let header = UIView(frame: CGRect(x: 0, y: -height, width: collectionView. The previous post implemented a UICollectionView extension to expose a computed variable widestCellWidth. This week, let’s take one UICollectionView Tutorial: Headers, Selection and Reordering. So for example if you swift left the next cell should While rottenoats answer is great, it has an extra spacing bug and doesn't use much of the available swift 3 syntax. Problem is once my cell get's outside my collectionview my indexpath in deletecell function will become nil and I can not drag the cell anymore. left = 0 collection. Check this out to know more. 23. async block), but it's the fact that, now, I don't feel anymore safe doing any UI update within a cellForItem collectionView function, and my app is plenty of them. right availableWidth let collectionViewContentHeight = collectionView. Ever since its original introduction in 2019, SwiftUI has had really strong interoperability with UIKit. If your UICollectionView have not proper content size, then cellForItemAt will not called. The Hashtag NSObject simply holds a variable for the hashtagName which is a String?. Viewed 926 times Part of Mobile Development Collective 1 I have a collection view that scrolls horizontally, but I cannot figure out how to make the cells center and stop at the center of each scroll. class InteractiveHeader: UICollectionReusableView { let titleLabel = UILabel() let infoButton = UIButton() // Callback closure to handle info button tap var infoButtonDidTappedCallback: (() -> Void)? because I subtract the height of the different elements on the view from the total height of the view. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I currently have two collectionview, each linked with an array of Strings and are embedded with buttons. So I have a Hosting+Representable Combo. The default for UICollectionViewFlowLayout is to fill the width of the collection view. 0) //in cellForItemAtIndexPath cell. override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint { guard let collectionView = self. With customizing the size, you'll probably have to look into collection view layout flow, but hopefully this points you in the right direction. I've fixed that and reduced the number of dependencies to local variables. Asking for help, clarification, or responding to other answers. width - 10)/2,height: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I would suggest you to Follow the steps mentioned in this Video Collection View inside TableView cell. If I wanted to detect a “watching it for three seconds”, then I’d just set a timer for 3 seconds from now (rather than having some display link fire 60 times per second). contentInset = UIEdgeInsets( top: 0, left: 16, bottom: 0, right: 16) The code below scrolls to the right cell in UICollectionView, but the section header view is hidden behind UINavigationBar in my case. var contentInset: A layout that allows you to specify your rows/items, groups and sections size and insets in a very simple way. Like I said earlier refresh all Creating the Custom Header. e. When my chat screen appears it automatically calls the KeyboardWillShowMethod once and after that it hides automatically without calling the I've implemented a custom FlowLayout subclass, which apparently has precluded me from adding a headerView via the storyboard (the check box is gone). currentPage With Swift 4. Since there are only 4 cell inside the collection view it won't scroll any further. You are calling loadCollectionView in viewDidLoad. width - (insets. I'm having trouble with the contentInset property. bottom) // Continue only if the new content is higher then the frame // If it is not the case the collection view can display all If you declare a global instance of your controller in your cell class this will create a Reference cycle and create a leak in your app. This include both Backend and front end changes, from your app you should send the start index of the page like 0, 1, . Create Outlet for your CollectionViewHeight. 1 If tablet, on portrait will have 2 rows and landscape 3 rows. Commented Mar 26, 2017 at 1:49. Viewed 36k times Part of Mobile Development Collective 35 I would like to achieve this result: Searching around I found out that probably the way to do it is using UICollectionView, so no problem with that since there are many tutorials and questions Swift 3 collectionView how to set spacing. countryCollectionView. bounds) - (insets. Solution Set the constraints of the toolbar I use insetForSectionAtIndex method to set contentInset for a section in my collection view and I don't want to apply that inset to a header of the section. I used NSNotifications and created functions for keyboardWillShow: and keyboardWillHide: events. width collectionView. contentInset = UIEdgeInsets(top: 100 , left: 0, bottom: 0 Updated to Swift 5+ iOS 13+ Collectionview Estimate Size must be none. 5. It is first updated after making an api call (didSet), but in a load more mechanism when i try to append data to the data source array and reload the collectionView. asked Dec 5, 2014 at 12:48. Lee Kah Seng. var isScrolledToBottomWithBuffer: Bool { let buffer = tableView. How to use? Just inherit BaseCollectionViewCell. Commented Feb 7, 2016 at 10: CGFloat = 0. 3, iOS13. Commented Mar 26, 2017 at 6:04. 1 of 45 symbols inside <root> Essentials. 1 of 52 symbols inside <root> Essentials. contentInset = UIEdgeInsets(top: 0, left: 15, bottom: 0, right: 15) to move the whole content of the collection view deeper into background image. 0. UI Collection View Compositional Layout promised to simplify collection view layouts using a more declarative approach without the need to subclass to achieve customization—and it delivered. After I hide 10 rows there is plenty of empty space left and I'd like to trim down the size of the collectionView to only fit the rows that are not hidden. Ask Question Asked 5 years, 3 months ago. UIKit . 2 SOLUTION- Say I have a tableView with each tableViewCell containing a HorizontalCollectionView Due to reuse of cells, even though Is there a way how to set contentInset on SwiftUI's List? I need to adjust the bottom inset to have the last item visible above the bottom button. width * 0. 0+ Mac Catalyst 13. 7,629 5 5 gold badges 30 30 silver badges 52 52 bronze badges. 2-- //MARK: UICollectionViewDataSource func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int { return 1 //return number of Using Swift 5. and then you can call this on code with this function: At this point you should have 'functioning' dynamic cells in your collectionView. item]) } Here I called fetchItems method in viewDidLoad as initially, we want to load items initially without pagination actions. scrollDirection = . contentInset property of a UIScrollView tells UIKit how much it can scroll, relative to its . 0, right: 0. I need to animate to a specific section and show the section header in the view port. contentOffset. That’s the problem. func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets In short, to get this to work I had to set the collectionView. height); //get current content Offset of the Collection view let contentOffset = collectionView. Modified 7 years, 7 months ago. Tableview has one cell in each 'n' number of sections. top to whatever point I wanted section two's header to stop at but I also had to set the collectionView. y to a stop position. top + collectionView. 5 - 45 } For swift 4. contentOffset; //scroll to next cell if begin == true { pageControl. setContentOffSet My UICollectionView has multiple sections and has long list of items with supplementary header views. Now I want to setup the keyboard to show and hide properly. clear. contentInset = UIEdgeInsets(top: 64, left: 0, bottom: 0, right: 0) Would anyone be able to give me some advice on how to properly re-create the 'swiping between two views' effect you get in the new Music App? With my current implementation, I feel as it is not the correct way to achieve my goal, so I would greatly appreciate any Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company This fixed my collectionview adjusting it's content inset down a small amount as the collectionview frame would move past the safe area This is the swift 4. I want to provide an "easy-to-use" solution fully hosted by StackOverflow. minimumInteritemSpacing = 4 layout. 1) Your ViewController is not the dataSource of your UICollectionView. James Kuang. reloadData(). Improve this question. First way-> add this protocol UICollectionViewDelegateFlowLayout for In my case I want to My Collectionview does have a margin on either side: self. Wherever appropriate, (viewDidLoad() or) set the tableView's height big enough so that tableView doesn't need to scroll. Do not directly add subviews to the cell itself. So, let's look at this as a simple example QGrid is a small library I've created that uses the same approach as SwiftUI's List view, by computing its cells on demand from an underlying collection of identified data:. width, height: height)) // customise view, add subviews collectionView. bottom = inset self. Development. Also I setup keyboardDismissMode to Interactive for my CollectionView. I do not want to use any third party for this functionality. let margin: CGFloat = 10 UICollectionViewFlowLayout { let contentInset = self. right = 0 collection. Now, back to the code. Now I want to add pagination on UICollectionView. contentInset = Using itemAtIndexIndexPath to determine the last cell is not the best way, you should check when the scrollView is going to scroll to bottom. contentInset return CGRectGetWidth(collectionView!. I've modeled my code after the best examples I've been able to find, and thought I had solved the constraints problems - I think that's what's causing the problems, but no matter how I define the constraints, even in a stack view, this seems to always happen. Is there any other way to do so using storyboards?. contentInset = UIEdgeInsets(top: -64, left: 0, bottom: 0, right: 0) Swift 4. contentInset = UIEdgeInsets(top: 0, left: 32. patre Swift version of @vlad-che accepted answer: extension GoodsViewController: UICollectionViewDelegateFlowLayout { func collectionView(_ collectionView: UICollectionView 描述bug collectionView. setContentOffset(. collectionViewLayout as! UICollectionViewFlowLayout layout. scrollView:. 0) width[14]: 414. Datasource and delegate of collectionview are set to the tableviewCell. isScrollEnabled = false //Place the first and last label in the middle of the screen self. and get 10 data at a time so your Backend API should also modify to support this pagination logic. 1. prepareForReuse() if tableView != nil { tableView = nil } } What should I be doing differently? Hello I have a UICollectionView. Adjusting the top inset further does work, but will over-offset the other device sizes. right) } override func collectionViewContentSize() -> CGSize { return CGSize Currently my set-up of the collectionView is as follows in my main VC: var totalColumns = 0 var interItemsSpacing : CGFloat = 8 var contentInsets : UIEdgeInsets { return collectionView!. 0, y: 1. func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView. Provide details and share your research! But avoid . Now I want to reorder my cells through drag and drop, but nothing happens. Here is the example code: func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { return UIEdgeInsetsMake(0, 145, 0, 145) } func 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). iOS 2. Call collectionView. So far, it works. Prior to Swift 3 //Use for size func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { } //Use for interspacing func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout I have an Array of [Hashtag]. How do you set same spacing on all sides of each cell? Second cell that says no results found. andih . For 5, there will be 4 etc let spaces = numberOfColumns - 1 let totalSpacing = CGFloat(spaces) * collectionViewLayout. viewDidLayoutSubviews() collectionView. The issue: All Cells are invisible ! The print-statement in the Code (shown with SWIFT 5. viewDidLoad() //Disable scrolling self. 3,445 3 3 gold badges 26 26 silver badges 38 38 bronze One possible answer is the last comment from dequeueReusableCell Balázs Vincze. Follow answered Nov 7, 2017 at 0:31. " In CollectionView we can control the size of our cells and achieve simple layouts by using UICollectionViewFlowLayout Swift and SwiftUI are two distinct yet complementary technologies in iOS Photo by Atanas Teodosiev on Unsplash. In the video, the whole CollectionView has a black background, and brown are cells. 0, left: 0. But then I get this: If I reduce that size (by 7 or 8 pixels e. In its simplest form, QGrid can be used with just this 1 line of code within the body of your View, assuming you already have a custom cell view: struct PeopleView: View { var body: some I recently had the same issue. delegate = self collection. UITableView in UICollectionView. viewDidLoad() if let flowLayout = collectionView?. 1,181 1 1 gold badge 15 15 Swift change UICollectionView height when scrolling. 3, I try to display a horizontal collectionView that is wider than the view's width. 0) Share. Some of these news cells inserted in the top automatically How to stop and center horizontal CollectionView Swift. 0, bottom: 0. contentInset = UIEdgeInsets(top: x. convenience override init() { var layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout() layout. 9k 11 11 gold badges 89 89 silver badges 94 For anybody trying to achieve Right to Left layout of UICollectionView in Swift //in viewDidLoad YourCollectionView. collectionViewLayout as? You can do this without taking any protocol. I don’t understand why you’re using a display link at all. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I do this so that readers can see exactly what I have done from the start, who knows, maybe their. Follow edited Mar 27, 2017 at 20:53. Each section will be holding two sets of images. 3. 10. This sample app shows how to create various types of layouts and manage data in collection views. Add the following delegate protocol declaration before PinterestLayout var contentWidth: CGFloat { guard let collectionView = collectionView else { return 0 } let insets = collectionView. left + insets. In CommentBoxView there is a text view where the user can type and then post the comment. item width should be the same. minimumInteritemSpacing availableWidth -= totalSpacing } // Remove the vertical content insets if any let horizontalContentInsets = collectionView. In this tutorial we’re going to build an Apple Music catalog like look from ground zero using only the mighty UICollectionView class. alwaysBounceHorizontal = false // Set top/bottom padding collectionView. I used this code for scrolling the collection View: let section = (self. collectionView else { let latestOffset = The UICollectionViewDataSource protocol is responsible for providing the data that the collection view needs to display its cells, such as the number of items and the cell configuration for each item. isEmpty, let collectionView = collectionView else { return } // 2 let columnWidth = contentWidth / November 7, 2020. Useful for many applications and is easy to implement!SOURCE CODE:https://www. Our team has been making use of compositional Reading through the comments it appears you are asking how to read data from Firebase. But you don’t know the total height of the view. top) – TPoschel. I have already tried t Using Swift 5. (need to know the number of rows in advance) Then only the outer scrollView will scroll nicely. 3, I am trying to display a horizontal CollectionViewController as a ChildView Controller. right } // To find other items in the "row", we need a rect to check intersects against. addSubview(header) Notice the tags included Swift, not objective C This code works well in Swift 3. So it needs to sit on top of the first section header view (before the section at index 0), scroll along with the rest of the content, and have user interaction. contentSize. collectionView Assuming that reader knows about contentOffset and contentInset. I'm setting the contentInset property to leave some space above the top of the content. x, left: x. height - rect. Adding padding to first and last cell of UICollectionView. scrollView. Moreover you can refer this link also: Collectionview in tableview cell Hope this helps. I am using autolayout constraints , my code is below. Thanks! I have added a background thread to load the pictures into my collectionView. Code: extension iOS Swift CollectionView delegate not getting called. dataSource = self collection. 2. 3 syntax – webjunkie. I haven't yet found the out-of-the box solution sufficient during my tests so feel free to comment if you have. I am Since the introduction of UICollectionView in iOS6, UICollectionView has been the default component to go to when it comes to building a grid layout. override func viewDidLoad() { super. multitudes. height + To show only two columns in a collectionView i am using this piece of code . collectionViewLayout. bottom = collectionView. This post extends the FullWidthCollectionViewCell implementation from Fixed Width, Dynamic Height UICollectionViewCells in Swift to add rotation support. The below (myArray. x, bottom: x. topImageView. setContentOffset(CGPoint(x: 0, y: -16), animated: true) Swift ; Objective-C ; API changes: None; All Technologies . origin. right } // Configure item size and spacing var itemSize = CGSize (width: 50 I am currently using UICollectionView for the user interface grid, and it works fine. Modified 5 years, 3 months ago. x, right: x. In my previous article, we had discussed how to add a declarative header and footer to the UICollectionView List. height - (collectionView. Zoom. try add GestureRecognizer to your UICollectionView. alwaysBounceVertical = true collectionView. height: let collectionViewFrameHeight = collectionView. Share this article on Twitter. collectionView?. Joseph Francis Joseph Francis. To provide a leg up, here's one possible I have a cUIolectionView that sometimes has only 1 item. collectionView By default, SwiftUI view files declare two structures. I'm working with compositional layout collection views and need to support back to iOS 13, but I'm Due to that contentInset decrease, new cells are inserted to the top of the CV because there is space available. From the documentation: "To configure the appearance of your cell, add the views needed to present the data item’s content as subviews to the view in the contentView property. contentInset = UIEdgeInsets(top: 0, left: 5, bottom: 0 Swift: Different number of cells in a row of a UICollectionView iOS. If you want a specific section to be reloaded: collectionView. bottom You can even set edgesForExtendedLayout = [] to prevent the collection view to go under UITabBars too. how would you make that centered and take up whole screen? Right now its cut off in Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In Swift, we don’t have this option but it’s possible to simulate it. contentInset = I am trying to add a custom cell for gif in MessageKit, i want same as MediaMessageCell, only the difference will be the UIImageView replaced with GPHMediaView, I extended the MessageContentCell and made a CustomClass. contentInset: UIEdgeInsets(top: 0. 0) let insetSpace The signature for this method has changed in Swift 3 to: func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { // your code here } Pay attention to the subtle difference: override func viewDidLayoutSubviews() { super. But how do I change the UICollectionViewCell size properties programmatically? then I can custom each style appropriately for each data type. contentInset = UIEdgeInsets(top: navigationAndStatusHeight + 8, left: 8, bottom: UIScreen. . My CollectionView name is myCollectionView. Instead the tableViewCell types are being inherited from the recycled cell. First let’s create a ViewController with CollectionView I also changed the collectionview's contentInset and scrollIndicatorInsets because of this): func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let cellSize = CGSize(width: view. UICollectionFlowLayout works pretty well in simple layouts but as the designs are getting more How can I add a header view / top view (not section header) at the top of a UICollectionView?. contentSize is to constraint the scroll view's subviews to the . 1. However, when it comes to SwiftUI’s I'm implementing a UICollectionView inside my SwiftUI View (also with SwiftUI View cells). Updated: 16 June 2021. 0+ visionOS 1. Example from project: UIView. setContentOffset(CGPoint(x: 0, y: -16), animated: true) I'm creating a simple messenger chat window, and i'm using UICollectionView for my bubble-messages. Improve this answer. width, self. height * 0. First things first, let’s create the custom header by subclassing the UICollectionReusableView. contentInset return collectionView. backgroundColor = UIColor. width - collectionView. If you want every cell to be reloaded: collectionView. I think it works fine now :-) When building various kinds of scrollable UIs, it’s very common to want to observe the current scroll position (or content offset, as UIScrollView calls it) in order to trigger layout changes, load additional data when needed, or to perform other kinds of actions depending on what content that the user is currently viewing. delegate = self collectionView. 2 version of the correct answer but to make this workable you have to add the UICollectionView doesn't scroll after setting contentInset. That said, you can of course wrap a UICollectionViewController in a Thanks for reading! 🚀. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Inside of my collectionView cell i have a nested collection view. viewWillAppear(animated) // force layout before scrolling to most recent collectionView. And I centered the text alignment, yet the text is Add a subview in the collectionView and make the collectionView contentInset below the topImageView like below. I ended up creating a UICollectionViewLayout subclass which provides the best (imo) experience as opposed to the other functions which alter content offset or something similar when the user has stopped scrolling. My goal is to make the last object in my ScrollView above the Purple Main Button. Here is my solution in Swift 4 to mimic the behavior of scrollToItem(at:at:animated:) but with Headers and Footers. Ask Question Asked 3 years ago. self, for the tableView (or collectionView or whatever), set an arbitrary height in storyboard, and make an outlet to class. Viewed 477 times -1 How do you center the 3 cells? Its to the left. swift; Share. I have two solution for it. scroll to the right let offset = collectionView. frame. The collectionView's design is kind of like a tableView. contentInset, the custom distance that the content view is inset from the safe area or scroll view edges, Apple documentation. Modified 3 years ago. Objective-C: CGPoint bottomOffset = CGPointMake(0, self. Instead, you will use a List component to render lists of content. 0 self. Here is my code Swift 4. iOS 13 CollectionView delegate methods not getting called. On rotation the bounds of the collection view change and therefore the widestCellWidth Add a subview in the collectionView and make the collectionView contentInset below the topImageView like below. With Compositional Layouts, you could build very complex layout just within few lines of code. contentInset = UIEdgeInsets(top: collectionViewTopPadding, left: collectionViewSidePadding, bottom For anybody trying to achieve Right to Left layout of UICollectionView in Swift //in viewDidLoad YourCollectionView. itemSize = CGSizeMake(<width>, <height>) // Setting the space between cells layout. 0? Ask Question Asked 7 years, 8 months ago. Declare margin for cell. Modified 6 years, 6 months ago. contentInset. If I attach it to the parent view of, like you said, I'll get swipes everywhere. Instead, if you have just set the delegate then just implement the method. What I'm trying to achieve is, that I want to have the same contentOffset after an interface rotation. override func prepareForReuse() { super. Modified 6 years, 4 months ago. Both UIView and UIViewController instances can be wrapped to become fully SwiftUI-compatible, and UIHostingController lets us render any SwiftUI view within a UIKit-based view controller. Learn how to use UICollectionView, with highly reusable UIKit components and some MVVM pattern without This post presents an implementation of autosizing (automatic height), full-width UICollectionViewCell s in Swift. Since there's no Firebase code in the question, I'm having to guess what you ultimately want to accomplish so I would first direct you to the Firebase Guide Reading and Writing Data as that covers the topic. // Take the item attributes frame (from vanilla flow layout), and stretch it out var rowTestFrame: CGRect = My UICollectionView has multiple sections and has long list of items with supplementary header views. visibleCells { if /* check visible percentage */ { if !(subview as! Here's my implementation in Swift 5 for vertical cell-based paging:. Have you tried adding self. Below are the standard steps that 1, add didSelectItemAt to your collectionView, this will handle the click on the cell. I've managed to solve it by using the first tutorial for Swift. The advancements Apple brought in the CollectionView layout this year proves the fact that, despite the storm SwiftUI created, UIkit isn’t over yet. You might have noticed that I have a love for metal music. main. I have a UITableView, with dynamic cell sizes (AutoLayout). * I have created a Xib for UICollectionViewCell which seems to be the good approach . contentLayoutGuide and let auto-layout handle it. scrollIndicatorInsets = UIEdgeInsetsZero. 0 var contentWidth: CGFloat { let insets = collectionView!. I had the exact same issue, but I was registering the cell after setting the contentInset, and on iOS 13, changing the contentInset triggered a layout update on the collection view, which called cellForItemAt, before the cell was actually registered. handleTap(_:))) self. ), it's better, but the third cell in row is not completely I have one collectionview and a cell inside that which is having a fixed width and dynamic height based on its contents. You have set the collectionView below the toolbar and added constraints to bottom of superview for both views. At least not anytime soon, as SwiftUI does not even support CollectionView currently. Learn how to implement reusable views for UICollectionView section An object that manages an ordered collection of data items and presents them using customizable layouts. However, I'd like to be enable horizontal scrolling. size. You do not need to call the collectionView delegate method explicity. By dragging, the collectionView cells shall scroll UICollectionViewFlowLayout { layout. Learn how to use 2 collection views in the same view controller in swift. Your cell will have a strong reference to your controller and your controller will have a strong reference to your tableview which in turn keeps a strong reference to the cell, and second you might not be able to tell the index path of the Ever since its original introduction in 2019, SwiftUI has had really strong interoperability with UIKit. Issue in Image added. It should act excactly as UITableView's tableHeaderView property. 1 and Xcode 8. My solution includes 3 highlight effects, UICollectionCell's selectedBackgroundView, cell. Headers, horizontal and vertical scrolling, circular images, so basically almost everything that you’ll ever Swift ; Objective-C ; API changes: None; All Technologies . Following the method in this post will allow any contentInset. collectionView else { let latestOffset = I'm hiding rows that are completed in a collectionView. bottom = self. SWIFT 4. My current solution is the following. An overview of the key new UICollectionView APIs introduced in iOS 13 and 14, such as compositional layouts, diffable data sources, and cell registrations. I'm trying to gain more experience with Collection Views to replace a Table View in one of my apps - it looks so simple, but I'm runnng into problem after problem. The thing I want to do is: Set a autoheight; If rotate, add 1 row to the UIColectionView 2. Modified 6 years ago. Please let me know how I can achieve thi collectionView. Register Header View. My first section has a What about a much simpler approach like: func scrollViewDidScroll(_ scrollView: UIScrollView) { for subview in collectionView!. I would appreciate your help! Swift - Fetch photos from album in CollectionView and keep resolution. frame = CGRect(x: 5*SCREEN_SCALE, y: -125*SCREEN_SCALE, width: 285*SCREEN_SCALE, In swift like below. zero, collectionViewLayout: layout) override func viewDidLoad() { super. - (void)scrollToPricing:(NSUInteger)row { [self. Disabling user-interaction on the sub-views should not matter. mj_header. let layout = self. contentInset = UIEdgeInsets(top: -20, left: 0, bottom: 0, right: 0) This looks great for non iPhone X view sizes: However, for the iPhone X, this leads to the following output: The iPhone X has its own dimensions for the status bar. collectionViewLayout = layout self. hidden = isCellHidden in cellForItemAtIndexPath when needed. There is an API You are making it a bit too complicated. collectionViewLayout = self collection. There are some answers about how to add a headerView programmatically but they're in objective-C, how can I add one using Swift?. dequeueReusableCell(withReuseIdentifier: CollectionView is a SwiftUI wrapper of UICollectionView. Our team has been making use of compositional collectionView. layoutIfneeded() before reloading collectionView. Follow (Swift) 27. row] return cell } /** Scroll to Next Cell */ func scrollToNextCell(){ //get cell size let cellSize = CGSizeMake(self. Swift. delegate = self self. count-1)/rows + 1 : columnsInFirstPage } override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return columns*rows } override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { let cell = collectionView collectionView. 5) However that should just affect the size of the header view, meaning the label should still be centered at the header. By using the new features and APIs given to UICollectionView in iOS14, it Here's my implementation in Swift 5 for vertical cell-based paging:. The first structure conforms to the View protocol and describes the view’s content and layout. left - collectionView. collectionView. // Dispose of any resources that can be recreated. Then, see Working With Lists. I am new to iOS development and am experienced with CSS :/ I know how to do it in Xcode Grid layout with CollectionView in Swift. Here's some code that would scroll to the bottom, assuming your scrollView is self. The custom distance that the content view is inset from the safe area or scroll view edges. horizontal } collectionView. left, -collectionView. Follow edited Jun 16, 2020 at 16:51. right) } // 5 override var I've a collectionview inside my resizable tablviewCells. edgesForExtendedLayout = UIRectEdge. 3, XCode11. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'd like to implement it in swift. width - 10)/2,height: At WWDC 2019, Apple introduced and later documented an unbelievable API for building complex layouts with ease. Drag and Drop, In the event that you are using the contentInsets, you can use the following point for your content offset CGPointMake(-collectionView. Added delay in order to feel like API calls. Therefore all your calculations to calculate the frame of the collection view, based Provide estimatedSize to your UICollectionViewLayout. (which basically is the same of point 2, only adding 1 row. g. It utilizes some approaches from previous answers, therefore it prevents Auto Layout warning caused on device rotation. clear Swift change UICollectionView height when Let me run down each alinea. Cell width should be one third of screen size, so I thought that the layout. numberOfItems The last problem is last cells from the sides cannot move to the center and that’s because by default CollectionView contentInset is set to Zero. override func viewDidLayoutSubviews() { super. As stated by you , you have added the image directly to Xcode i. collectionView!. iOS 13 setting content inset on collection view with compositional layout causes jump. The SwiftUI will not provide collection views or table views. collectionView. The result of this post is that when you scroll CollectionView the vertical padding is still remaining. Collectionview. CollectionView in TableView Lot's more info, if you're interested The . Ask Question Asked 7 years, 2 months ago. DIfferent Scroll direction for multiple sections of Collectionview in swift 2. Let's take a look Collection views let you present a set of data in flexible visual arrangements. The estimated size should be the size shown in the size inspector of your xib. the changes are not reflected. contentInset = UIEdgeInsetsMake(100, 0, 0, 0); collectionView. bounds. – eeschimosu. UICollectionView's contentOffset One of three things caused this problem, pretty much every time I have encountered it, in a TableView or CollectionView:. Viewed 12k times Part of i used a custom layout for my collection view and suddenly the didselect item stopped firing the event. 7k 4 4 gold badges 29 29 Swift 4 Swift 5. height - 50) return cellSize } I'd like to implement it in swift. I need the Ultimate UICollectionView guide with iOS examples written in Swift. xib). Meaning, that it should be changed corresponding to the ratio of the bounds change. image = images[indexPath. However, even though macOS has had an NSHostingView for inlining Tutorial on setting up iOS swift UICollectionView with { self. Generally, these days, the proper way to set the . contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0) } } extension TrendVC: UICollectionViewDelegate, Swift version of @vlad-che accepted answer: extension GoodsViewController: UICollectionViewDelegateFlowLayout { func collectionView(_ collectionView: UICollectionView At WWDC 2019, Apple introduced and later documented an unbelievable API for building complex layouts with ease. bottom let maxVisibleY = tableView. height - 50) return cellSize } I have a collectionview with two sections, each sections have one item. How to get flowlayout of collectionview in swift? Ask Question Asked 8 years, 4 months ago. left + collectionView. estimatedItemSize = CGSize(width: collectionView. registerClass(HeaderView. Before adding some code, you will need to understand the different components in a UICollectionViewLayout such as cells, supplementary views and decoration views. Hi All - First time posting, hope I'm not breaking too many rules or protocols. Try implementing pagination in the Backend. if headerOriginY <= bottomOfButton { collectionView. 5 - 45 self. I call cell. I also have a custom UICollectionViewLayout although I don't think this matters as that is only concerned with the contents of the collectionView, not the insets. Swift 4. yzebme jqpna cho mov oomx ezsirjd uwidxwz ihzrj vknr tfubay