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             }         }     }

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)         }     } }

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

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             }     }

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/

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?

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     }