Thanks for your response, David. I have more questions. Are there plans to have MusicLibrary "sit on top of" iTunesMusicLibrary? Alternately, is there a plan to have iTunesMusicLibrary return MusicKit types for Swift? Thank you, Greg

I should also clarify: I'm running this on macOS.

I just tested; it reproduces on iPad. However it works fine on iPhone.

Looks like this is related: https://stackoverflow.com/questions/73267638/how-to-run-task-or-onappear-on-navigationsplitview-detail-for-every-selectio

I re-watched the Demystifying SwiftUI and Data Essentials in SwiftUI WWDC sessions. I basically learned that the LoadingState I have above needs to be "extracted" from CategoryDetail and maintained in the CategoryNavigation*View as a [Category:LoadingState] dictionary. This way the state is persisted and associated with the Category. I also used the modifier .task(id:) so that it would execute when the selection changed. It's also still tricky to understand the best way to show "this hasn't ever started loading yet". enum Category: CaseIterable, Hashable, Identifiable {   case first   case second   var id: Self {     self   } } struct CategoryRow: View {   let category: Category   var body: some View {     Text("Row: \(String(describing: category))")   } } extension Binding {   public func defaultValue<T>(_ value: T) -> Binding<T> where Value == T? {     Binding<T> {       wrappedValue ?? value     } set: {       wrappedValue = $0     }   } } struct CategoryDetail: View {   enum LoadingState {     case none     case loading     case loaded     case error   }   @Binding var category: Category?   @Binding var loadingState: LoadingState   var body: some View {     Group {       if category == nil {         Text("Select A Category")       } else {         VStack {           Text("Category: \(String(describing: category))")           Text("LoadingState: \(String(describing: loadingState))")         }       }     }.task(id: category) {       guard let category else {         debugPrint("nothing selected")         return       }       guard loadingState == CategoryDetail.LoadingState.none else {         debugPrint("Early Exit \(String(describing: category)): \(String(describing: loadingState))")         return       }       loadingState = .loading       do {         try await Task.sleep(for: .seconds(2))         loadingState = .loaded       } catch {         loadingState = .error       }     }   } } struct CategoryNavigationSplitView: View {   @State var selectedCategory: Category?   @State var loadingStates : [Category : CategoryDetail.LoadingState] = [:]   var body: some View {     NavigationSplitView {       List(Category.allCases, selection: $selectedCategory) { category in         NavigationLink(value: category) { CategoryRow(category: category) }       }     } detail: {       CategoryDetail(category: $selectedCategory,                      loadingState: (selectedCategory != nil) ?                             $loadingStates[selectedCategory!].defaultValue(.none) :                       .constant(.none))     }   } } struct CategoryNavigationView: View {   @State var selectedCategory: Category?   @State var loadingStates : [Category : CategoryDetail.LoadingState] = [:]   var body: some View {     NavigationView {       List(Category.allCases, selection: $selectedCategory) { category in         NavigationLink {           CategoryDetail(category: $selectedCategory,                          loadingState: (selectedCategory != nil) ?                                 $loadingStates[selectedCategory!].defaultValue(.none) :                           .constant(.none))         } label: {           CategoryRow(category: category)         }       }     }     Text("Select a Category")   } }

I just created a new macOS SwiftUI Project, and imported another SwiftUI library (using File → Swift Packages → Add Package Dependency). In the simple app's ContentView, I imported the module and added the new random SwiftUI view. I did Command-R, which is a Debug configuration by default, and it builds and runs, and shows the library UI. If I then xcodebuild -verbose -configuration Debug it has the same problem. It has the same problem if I remove -configuration Debug. When compiling app Swift code, the compiler cannot find the module defined by the swift package manager. /Users/bolsinga/Desktop/SPMText/SPMText/ContentView.swift:9:8: error: no such module 'MovingNumbersView' import MovingNumbersView        ^ How do I "inspect" a swift module? I may be able to learn it is being built incorrectly. How do I inspect where the swift compiler is "looking" for swift modules? I may be able to learn why it isn't looking in the right places. Thanks for any tips! Perhaps there is a better place to ask this question?

I've also tried here: https://github.com/apple/swift-package-manager/issues/6074

Thanks to the GitHub issue, I learned that SPM and legacy builds (which I think is the -configuration) do not work together. The trick is to xcodebuild -list, gather the scheme name you want to build, and then use xcodebuild -scheme <name-of-scheme>.

FWIW My app is a full SwiftUI lifecycle app, so it is using onOpenURL.

My app is on macOS too. By reading the transcripts of https://developer.apple.com/videos/play/wwdc2020/10098/, I found swcutil. Here is its output of sudo swcutil show --verbose. I have not denied it. Service: applinks App ID: D3F44CA7F4.gdb.SiteApp App Version: 1.0 App PI: <LSPersistentIdentifier 0x11f61dd80> { v = 0, t = 0x8, u = 0x7134, db = 2183ADB1-C496-48F1-B7FF-1301111FE8A7, {length = 8, bytes = 0x3471000000000000} } Domain: www.bolsinga.com User Approval: unspecified Site/Fmwk Approval: denied Flags: Last Checked: 2023-06-12 21:37:13 +0000 Next Check: 2023-06-17 21:09:09 +0000 I found openul: $ sudo swcutil --verbose openul -u https://www.bolsinga/com/dates/sh624.html NSOSStatusErrorDomain -10814 { _LSLine: "763", _LSFunction: "+[LSAppLink(Internal) _openWithAppLink:state:completionHandler:]" }

#wwdc20-10098

@eskimo Hi! Thanks so much. What is this new download? Is it related to this problem? Do we install it on the VM or in the host? https://developer.apple.com/download/ Regardless, I tried on the host and the VM w/o success. How do we update our VM running macOS 14 beta 1 to beta 2? Thanks! Device Support for macOS 14 beta 2 Install Device Support for macOS 14 beta 2 if installing the macOS Seed in a virtual Machine fails on a host Mac. Released June 21, 2023 Build 1700B21 Download Device Support Image Device Support for macOS 14 beta 2 1700B21

It works great now that the CDN has caught up. Thanks again!

Thanks! This is terrific.

See https://github.com/apple/swift-package-manager/issues/6993 At least I found a workaround. xcstrings no longer need the "en.lproj" directory, and it appears maybe SPM is looking for that. If I add a "fake" file in that directory it will build!