In my Table View I have the label text set to a different colour if the name is in the Flagged Array (flaggedNames). The correct cell labels turn red but as I scroll the text of other labels are also red. This changes as I scroll.     override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {         let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)         let name = names[indexPath.row]         cell.textLabel?.text = name         if flaggedNames.contains(meterNumber) {             cell.textLabel?.textColor = .systemRed         }         return cell     }

In a section of my app I would like to recommend restaurants to users based on certain parameters. Some parameters have a higher weighting than others. In this WWDC Video a very similar app is made. Here if a user likes a dish a value of 1.0 is assigned to those specific keywords (that apple to the dish) with a value of -1.0 to all other keywords that don't apply to that dish. For my app if the user has ordered I then apply a value of 1.0 (to the keywords that apply) but if a user has just expressed interest (but not ordered) then can I apply a value of 0.5 (and -0.5) instead, would the model adapt to this?

I'm trying to access another class in my CollectionView Controller but when I try and initialise the class I get the error Here is the class @MainActor class AlbumsViewModel {     private let albumService: AlbumService     private let favouritesService: FavouritesService     private let recommendationService: RecommendationService     @Published var favourites = [Bool]()     @Published var recommendedAlbums = [Album]()     @Published var allAlbums = [Album]() {         didSet {             updateFavourites()         }     }     init(albumService: AlbumService, favouritesService: FavouritesService, recommendationService: RecommendationService) {         self.albumService = albumService         self.favouritesService = favouritesService         self.recommendationService = recommendationService     } ...(functions here) Collectionview Controller Class class CVC: UICollectionViewController, UICollectionViewDelegateFlowLayout {     var viewModel: AlbumsViewModel     init?(viewModel: AlbumsViewModel, coder: NSCoder) {         self.viewModel = viewModel         super.init(coder: coder)     }     required init?(coder: NSCoder) {         fatalError("init(coder:) has not been implemented")     }     override func viewDidLoad() {         super.viewDidLoad()         collectionView.delaysContentTouches = false         Task {             print(viewModel.allAlbums)         }     } // End viewDidLoad ... Trying to recreate this https://martinmitrevski.com/2021/07/11/ml-recommendation-app-with-create-ml-on-ios-15/

I have button inside a CollectionViewCell and when tapped I want to run an animation. The animation doesn't run and I'm not sure why. Inside the Cell class @IBAction func hoursExpandBtnTapped(_ sender: Any) { UIView.animate(withDuration: 3, delay: 0, options: .curveLinear) { [self] in addressLbl.frame = CGRect(x: addressLbl.frame.minX, y: addressLbl.frame.minY, width: 20, height: addressLbl.frame.height)             } completion: { _ in             }     }

One part of my app uses CreateML but I still need to test the UI on other screen sizes with the simulator. I tried using this condition but still get the same error. #if os(iOS) import CreateML // CreateML is not available when building for iOS Simulator. Consider using `#if os(iOS)` to conditionally import this framework when building for iOS. #endif

In my tableview I have a few custom cells. When I scroll in the tableview it lags in the same spot but only for the first time the app is open. if I go back to the root view then open the tableview again it doesn't seem to lag. I've traced the lag to one cell. In that cell I have an embedded collection view and each of those cells has image view with is showing a MKMapSnapshot and also a few labels etc. If run with 0 collectionView cells (numberOfCellsInSection) the tableview scrolls smoothly but lags when I have 1 or more CollectionViewCell cells. I initially loaded the image in the collectionView cell class in layoutSubviews which worked but I then learned that this is called numerous times so code like that shouldn't be there. if I put it in awakeFromNib the Branch struct doesn't seem to have been passed to the cell as yet (from cellForRowAt) so it doesn't work there. I then moved setting the image in cellForItemAt but I'm still not sure if it is correct there. // Table View cellForRowAt         case .branchesCell:             let cell = tableView.dequeueReusableCell(withIdentifier: "branchesCell", for: indexPath) as! BranchesCell             cell.branches = restaurant?.branches // This is the info the embedded collectionView cell should display. Text for labels and coordinates for the MKMapSnapshot.             return cell // TableView Cell Class class BranchesCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {     @IBOutlet var collectionView: UICollectionView!     var branches: [Branch]?     var restaurantName = String()     override func awakeFromNib() {         super.awakeFromNib()         collectionView.delegate = self         collectionView.dataSource = self         collectionView.backgroundColor = .clear         collectionView.delaysContentTouches = false     }     // MARK: UICollectionView     func numberOfSections(in collectionView: UICollectionView) -> Int { return 1 }     func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {         if let branches = branches {             return branches.count         } else { return 0 }     }          func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {         let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! NestledBranchCell         cell.layer.masksToBounds = false         cell.backgroundColor = .clear         let imageView = cell.viewWithTag(1) as! UIImageView         if let branches = branches {             cell.branch = branches[indexPath.row]             cell.restaurantName = restaurantName // Tried to run this in a different thread to see if it would make a difference.             DispatchQueue.main.async() { [self] in                 let size = CGSize(width: 314, height: 195) // Set the image here                 getMapImage(branch: branches[indexPath.row], size: size) { mapImage in                     imageView.image = mapImage                 }             }         }         return cell     }     func getMapImage(branch: Branch, size: CGSize, completion: @escaping (UIImage?) -> ()) {         var mapImage = UIImage()         let mapSnapshotOptions = MKMapSnapshotter.Options()         let location = branch.coordinates.coordinate         let region = MKCoordinateRegion(center: location, latitudinalMeters: 300, longitudinalMeters: 300)         mapSnapshotOptions.region = region         mapSnapshotOptions.scale = UIScreen.main.scale         mapSnapshotOptions.size = size         mapSnapshotOptions.showsBuildings = true         mapSnapshotOptions.pointOfInterestFilter = .none         let snapShotter = MKMapSnapshotter(options: mapSnapshotOptions)         snapShotter.start { snapshot, error in             let image = snapshot?.image             mapImage = image!             completion(mapImage)         }     } }

I have a TableviewController which has multiple customs cells. One of them has a CollectionView (inside the tableView cell). In the CollectionView Cell I have as Image View where I need to display a map. Everything works but when I navigate to the TableviewController for the first time and scroll down I get a glitch/lag/frame drop at a certain spot. this only happens once and if you go back to the previous view then again to the TableView Controller the lag doesn't seem to be present. If I don't set the map image then the lag goes away so this is definitely causing that issue. // TableView cellForRowAt         case .branchesCell:             let cell = tableView.dequeueReusableCell(withIdentifier: "branchesCell", for: indexPath) as! BranchesCell             cell.branches = restaurant?.branches             cell.restaurantName = restaurant?.metadata.name ?? ""             return cell // Tableview Cell Class - BranchesCell     func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {         let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! NestledBranchCell         cell.layer.masksToBounds = false         cell.backgroundColor = .clear         if let branches = branches {             cell.branch = branches[indexPath.row]             cell.restaurantName = restaurantName         }         return cell     } // Collectionview Cell Class - NestledBranchCell     override func awakeFromNib() {         super.awakeFromNib()         contentView.layer.applySketchShadow(color: .black, alpha: 0.14, x: 0, y: 7, blur: 14, spread: 0)         containerView.clipsToBounds = true         containerView.layer.cornerRadius = 15         tradingStatusLbl.layer.cornerRadius = 10         tradingStatusLbl.layer.masksToBounds = true         directionsBtn.layer.cornerRadius = 10         callBtn.layer.cornerRadius = 10     }     override func draw(_ rect: CGRect) {         super.draw(rect)         setupCell() // Setting a few labels         Task {             await setupMap()         }     }     func setupMap() async {         if let branch = branch {             let mapSnapshotOptions = MKMapSnapshotter.Options()             let location = branch.coordinates.coordinate             let region = MKCoordinateRegion(center: location, latitudinalMeters: 300, longitudinalMeters: 300)             mapSnapshotOptions.region = region             mapSnapshotOptions.scale = UIScreen.main.scale             let size = CGSize(width: 314, height: 195)   mapSnapshotOptions.size = size             mapSnapshotOptions.showsBuildings = true             mapSnapshotOptions.pointOfInterestFilter = .none             let snapShotter = MKMapSnapshotter(options: mapSnapshotOptions)             snapShotter.start { snapshot, error in                 let image = snapshot?.image                 self.imageView.image = image             }         }     }

How do you set the size of an area light in sceneKit?         let areaLightNode = SCNNode()         areaLightNode.light = SCNLight()         areaLightNode.light!.type = .area                  areaLightNode.position = SCNVector3(x: 0, y: 5, z: 0)         areaLightNode.light?.intensity = 1000 Nothing appears when using the above

I subclassed UISlider and changed the track width (and nothing else) and as you move the slider to the end the last bit of the track appears before the thumb has been moved to the end and there is no radius on the end. If the thumb is at the start you have to move the thumb quite a bit before the track starts to highlight.

I have a collectionView inside my UIKit view controller using UIViewControllerRepresentable (App is SwiftUI). How can I segue to another view when a cell is tapped. Usually I’d just segue from didSelectCellAt but how can I create a SwiftUI NavigationLink from there? (I will be switching to another Viewcontroller)

I have a basic List made in SwiftUI. When I scroll with the Digital Crown I get the "light haptics" however when I get to the top or bottom of the list I don't get the more pronounced dent. Update - If I use a plain list style then I get the haptics as expected. However it should work with the elliptical style as this is used in the system. The console outputs the following 2022-05-19 23:32:53.782614+0200 WatchApp WatchKit Extension[326:41020] [default] Error: Error Domain=NSOSStatusErrorDomain Code=-536870187 "(null)" 2022-05-19 23:32:53.783181+0200 WatchApp WatchKit Extension[326:41020] [detents] could not play detent NO, 2, Error Domain=NSOSStatusErrorDomain Code=-536870187 "(null)", (         {         Gain = "0.01799999922513962";         OutputType = 0;         SlotIndex = 4;     },         {         Gain = "0.4900000095367432";         OutputType = 1;         SlotIndex = 5;     } ) Here is my code struct ContentView: View {     var body: some View {             List {                                  ForEach(0..<100) { i in                                         NavigationLink(destination: FeedView()) {                         Text("Hello")                     }                 }                              }.navigationTitle("Title")         } }

I'm trying to recreate the watchOS App Store layout however there are a few parts I am not how to recreate. When scrolling an Elliptical Style List the cells will "snap" up if you are scrolling slowly. This effect works well with regular size cells with just a line of text but makes the List scrolling seem a glitchy when the cells are taller. In the App Store app this "snap" effect is not there. When scrolling there is still a visible "Elliptical Scroll Style" but this effect is missing for the "See All" cells which scroll as if it were a "Plain Style List". How would you create this effect? Also when using a Plain Style List and you scroll to the very top or bottom you get a "heavy" haptic feedback which is absent on Elliptical Style Lists. The App Store app still has this "heavy" haptic feedback when you get to the top or bottom yet it uses an Elliptical List style (or at least something in between as explained above.)

How do I overlay an annotation/detail popup to AR Models in QuickLook? This was done with the WWDC Trading Cards AR Model. I haven't been able to find any other info on this. Here is an article which has an image of what I am referring to https://vrscout.com/news/apple-shows-off-ar-trading-cards-ahead-of-wwdc-2022/

I want to add a small banner to my AR model when viewed in QuickLook in my app. I haven't been able to find much information on this however I found this resource where it explains how to add it when you have a model on a website. My model is locally stored on the device so how would I add this?

In my collection view I have an image with some text below. I have a height constraint for the image view so the image aspect ratio can be adjusted (cells are the width of the screen). I set the constraint constant in cellForItemAt. The cell heights only resize correctly after I scroll. CollectionViewController     override func viewDidLoad(_ animated: Bool) {         super.viewDidLoad(animated)         let layout = collectionView.collectionViewLayout         if let flowLayout = layout as? UICollectionViewFlowLayout {             flowLayout.estimatedItemSize = CGSize(width: collectionView.widestCellWidth, height: 800)         }     }     override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {         let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! selectCell         cell.setupView() // Image resolution is already downloaded         let gsReference = storage.reference(forURL: thumbnail.storageLocation)         cell.imageView.sd_setImage(with: gsReference, placeholderImage: nil)         cell.layoutIfNeeded()         cell.layoutSubviews()         return cell     } selectCell.swift     override func systemLayoutSizeFitting(_ targetSize: CGSize, withHorizontalFittingPriority horizontalFittingPriority: UILayoutPriority, verticalFittingPriority: UILayoutPriority) -> CGSize {         var targetSize = targetSize         targetSize.height = CGFloat.greatestFiniteMagnitude         let size = super.systemLayoutSizeFitting(targetSize, withHorizontalFittingPriority: .required, verticalFittingPriority: .fittingSizeLevel)         return size     }     func setupView() { // Changing the labels size the cell correctly when first loaded             titleLbl.text = ""             descriptionLbl.text = ""                          let imageAspectRatio = CGFloat(metadata.thumbnail.width) / CGFloat(metadata.thumbnail.height)             let imageViewHeight = containerView.frame.width / imageAspectRatio             imageViewHeightConstraint.constant = imageViewHeight             self.contentView.setNeedsLayout()             self.contentView.layoutIfNeeded()     }