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I'm trying to use the new (announced at WWDC 2023 and available in iOS 17 and macOS 14) API to observe scroll position of SwiftUI ScrollView. I have the following view, but I can't make it work correctly. That is, using the scrollPosition(id:anchor) view modifier makes the scroll view go nuts. At some point, and in some cases even at the very beginning, the scroll view just starts jumping and is stuttering when trying to scroll. See the screen recording here: https://mastodon.social/@tomkraina/111249340792812592 The code: struct ContentView: View { private var itemSize: CGSize = .init(width: 50.0, height: 50.0) // Annotated as @State to create the sections only once @State private var sectionData = makeSections() // Tracking scroll position @State private var currentItemID: MyIdentifier? var currentItemDescription: String { self.currentItemID?.stringId ?? nil } var body: some View { VStack { // 1. Scroll View ScrollView(.vertical) { LazyVGrid( columns: [.init(.adaptive(minimum: self.itemSize.width),

This may be trivial to some but I just would like to know if you can copy an array to a new array and change the type of the data for each column of elements? I have loaded a file into an array as String data as I can't seem to do it any other way (i.e. as another type) I now want to convert some of the columns to a different type in possibly a new array. I have an array full of string data and I would like to convert it to Double, or some Int, data so that I can easily do my calculations. I would appreciate as much info as possible as I am relatively new to SwiftUI and Xcode. Many thanks, D Norris

Hello everyone, I am experiencing a very weird issue. I have a simple relationship between 2 models, that occasionally starts crashing the app, with the following error: error: : Attempting recovery from error encountered during addPersistentStore: 0x282523c60 Error Domain=NSCocoaErrorDomain Code=134110 An error occurred during persistent store migration. UserInfo={sourceURL=file:///private/var/mobile/Containers/Shared/AppGroup/F8286D67-AC8C-4441-A151-13B5AAA509F3/Library/Application%20Support/default.store, reason=Cannot migrate store in-place: I/O error for database at /private/var/mobile/Containers/Shared/AppGroup/F8286D67-AC8C-4441-A151-13B5AAA509F3/Library/Application Support/default.store. SQLite error code:1, 'duplicate column name: Z1POSITIONS', destinationURL=file:///private/var/mobile/Containers/Shared/AppGroup/F8286D67-AC8C-4441-A151-13B5AAA509F3/Library/Application%20Support/default.store, NSUnderlyingError=0x2825c6700 {Error Domain=NSCocoaErrorDomain Code=134110 An error occurred during

I am using public struct ShareLink : View where Data : RandomAccessCollection, PreviewImage : Transferable, PreviewIcon : Transferable, Label : View, Data.Element : Transferable {} And it is generating entitlement errors and not working reliably ( will transfer 1-3 items, but not 4+ ; will not work a second time) Error is: Error acquiring assertion: Received port for identifier response: <> with error:Error Domain=RBSServiceErrorDomain Code=1 Client not entitled UserInfo={RBSEntitlement=com.apple.runningboard.process-state, NSLocalizedFailureReason=Client not entitled, RBSPermanent=false} elapsedCPUTimeForFrontBoard couldn't generate a task port Received port for identifier response: <> with error:Error Domain=RBSServiceErrorDomain Code=1 Client not entitled UserInfo={RBSEntitlement=com.apple.runningboard.process-state, NSLocalizedFailureReason=Client not entitled, RBSPermanent=false} elapsedCPUTimeForFrontBoard couldn't generate a task port Received port for identifier response: <> with er

I'm confused by the stats on the TestFlight builds screen. See below. There are more crashes than sessions. So the definition of session can't quite be what I thought. Does a session have to last more than a certain amount of time to be included? Do sessions that end in a crash not count as sessions? Do multiple invocations within a short period of time count as a single session? The number of sessions falls over time. I.e. once I have released a new version, the reported Sessions numbers for older versions slowly fall. Maybe as soon as a user has used version N+1, all their sessions for version N are removed from the stats? The invites column is clearly the same for every version, while it should have been slowly increasing. Is there any value in these numbers?

I have a two column LazyVGrid inside a ScrollView and want to animate the removal of an item when the user taps on it. This seems to work fine when either the top or the bottom of the grid is visible (i.e. scrolled all the way up or down) and when removing an item doesn't change the number of rows. But when you scroll down a bit and remove an item when it results in the number of rows changing, it flashes as it's rendering. Minimally Reproducible Example import SwiftUI extension Color { static var random: Color { let red = Double.random(in: 0...1) let green = Double.random(in: 0...1) let blue = Double.random(in: 0...1) return Color(red: red, green: green, blue: blue) } } struct ContentView: View { @State private var items: [Int] = Array(1...50) let columns = [GridItem(.flexible(), spacing: 2), GridItem(.flexible(), spacing: 2)] var colorDictionary: [Int: Color] = [:] init() { for i in 1...50 { colorDictionary[i] = Color.random } } var body: some View { ScrollView { LazyVGrid(columns

If I run the exact same code on MacOS 12.7 (Xcode 14.2) and MacOS 15.0.1 (Xcode 15.0.1). In a scrollView, I display lines (lineDivider) and then a LazyVgrid, applying some offset: ScrollView(.vertical) { ForEach(1...50, id: .self) { index in LabelledDivider(label: (index), color: .gray.opacity(0.1)) .offset(y: CGFloat(65*index - 50) } LazyVGrid(columns: gridItemLayout, spacing: 33 ) { ForEach ($allItems.theItems) { $item in ItemView(item: item) } } .offset(y: 40) } In Xcode 14.2, I get the first layout and in Xcode 15.0 the second on right: The divider line is at the same position, but the view in grid is not. If I change .offset(y: 40) to .offset(y: 60) I get the same layout. So my questions: did anyone observe similar change ? is it due to Xcode, to MacOS ? Is it documented somewhere ?

I'm using two loops, one nested in another to create and assign a subclass to the parent class. I'm using x for one loop and y for the other loop. Print statement shows the loop variables being updated correctly, however the subclass has both variables as the same value. I'm not sure if the value is being stored as the same value or being displayed as the same value. I've checked both creation and display code. I can't find the error. var body: some View { NavigationSplitView { List { ForEach(routes) { item in NavigationLink { Text(Route: (item.route_name) nSeason: (item.route_season)nCoordinates: (item.route_coordinates)nProcessed: (String(item.route_processed))nNumber of baseboards: (item.route_baseboards.count)) } label: { Text(item.route_name) } //end route nav link } //end route for each .onDelete(perform: deleteItems) //end route nav ForEach(baseboards) { item in NavigationLink { //if let test = item.baseboard_heightPoints.count { Text(Grid Size: (String(item.baseboard_grid_size))nRow:(String(item.baseb

I need to know correct color conversion matrices for converting YCbCr422 and YCbCr420 10 bit video range sample buffers (BT.2020 color space) to RGB. AVFoundation framework mentions AVVideoYCbCrMatrix_ITU_R_2020 which is a string constant. But I need to know the full matrix that can be used to perform color conversion. I have this matrix for full range BT2020, not sure if this is correct and what is the correct way to adapt it to video range. let colorMatrixBT2020_fullRange = ColorConversion(matrix: matrix_float3x3(columns: (simd_float3(1.0, 1.0, 1.0), simd_float3(0.000, -0.11156702/0.6780, 1.8814), simd_float3(1.4746, -0.38737742/0.6780, 0.000))), offset: vector_float3(0.0, -0.5, -0.5))