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 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

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'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()     }

I’m trying to add a search filter UI like the one used in the Music app. I’ve tried to add a reusable view to the search controller collection view but there seems to be padding around it. My plan was just to add a Collection View there and try recreate the animation used. I tried scope buttons but those are a segment control, so they only hold a few options.

In my view controller I have a collection view and over that there is a scroll view (covering the whole main view). The collection view acts as a sort of "header" to the scroll view and has images in it. The scrollview has a clear view at the top the same size as the collection view to make the collection view visible through the scrollview - collectionViewTouchView. This is done so I can create a parallax effect when scrolling. The problem is that I can't swipe on the collection view because the scrollview is over it. Can I somehow record touch events on collectionViewTouchView and then pass it directly to the collection view?

In my app user accounts are handled with Firebase Auth. When creating a user how can I get the system to suggest a Unique password (that prompt that comes up on the keyboard) and also how can i get it to save these details to the keychain. My app will have a website in the future so I want the details come up when the user tries to login there. When the user logs in i used the func below to save the details to the keychain, it says the details have been saved but it doesnt seem to come up in the passwords tab in Settings. func saveCredentialsToKeychain(email: String, password: String) { let query: [String: Any] = [ kSecClass as String: kSecClassInternetPassword, kSecAttrServer as String: "myWebsite.com", kSecAttrAccount as String: email, kSecValueData as String: password.data(using: .utf8)!, kSecAttrAccessible as String: kSecAttrAccessibleWhenUnlocked ] let status = SecItemAdd(query as CFDictionary, nil) if status == errSecSuccess { print("Credentials saved to Keychain") } else { print("Error saving credentials to Keychain: \(status)") } }

I have a CollectionView in my SwiftUI App. The collectionView is wrapped in a UIViewRepresentable. If I tap on a collectionView cell normally the function isn't called but if I hold the cell down the console prints <0x107507790> Gesture: System gesture gate timed out. and when I let go of the cell after that's printed then didSelectItem is called. Here is my CollectionView Class: class SessionsCollectionView: UIView, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout { lazy var collectionView: UICollectionView = { let layout = UICollectionViewFlowLayout() layout.minimumInteritemSpacing = 0 layout.minimumLineSpacing = 30 let collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: layout) collectionView.translatesAutoresizingMaskIntoConstraints = false collectionView.dataSource = self collectionView.delegate = self collectionView.clipsToBounds = false collectionView.delaysContentTouches = false collectionView.register(SessionCell.self, forCellWithReuseIdentifier: "cell") collectionView.register(SessionsHeader.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "header") return collectionView }() override init(frame: CGRect) { super.init(frame: frame) self.backgroundColor = .clear setupCollectionView() } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } private func setupCollectionView() { addSubview(collectionView) collectionView.backgroundColor = .clear collectionView.alwaysBounceVertical = true collectionView.alwaysBounceHorizontal = false collectionView.delaysContentTouches = false collectionView.contentInset = .init(top: 20, left: 0, bottom: 20, right: 0) collectionView.showsVerticalScrollIndicator = false NSLayoutConstraint.activate([ collectionView.topAnchor.constraint(equalTo: topAnchor), collectionView.leadingAnchor.constraint(equalTo: leadingAnchor), collectionView.trailingAnchor.constraint(equalTo: trailingAnchor), collectionView.bottomAnchor.constraint(equalTo: bottomAnchor) ]) } // MARK: Header func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView { if kind == UICollectionView.elementKindSectionHeader { let sectionHeader = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "header", for: indexPath) as! Header return sectionHeader } } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize { let width: CGFloat = collectionView.frame.width let height: CGFloat = 33 + 20 return CGSize(width: width, height: height) } // MARK: - UICollectionViewDataSource func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return 10 } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! SessionCell return cell } // MARK: - UICollectionViewDelegateFlowLayout func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let width = collectionView.bounds.width let height = 150 return CGSize(width: collectionView.bounds.width, height: height) } func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { print(indexPath.row) } } struct SessionsCollectionViewWrapper: UIViewRepresentable { var sessionViewNavigation: SessionViewNavigation func makeUIView(context: Context) -> SessionsCollectionView { let sessionsCollectionView = SessionsCollectionView() return sessionsCollectionView } func updateUIView(_ uiView: SessionsCollectionView, context: Context) { // Update any properties or handle updates if needed } }