What's new in SwiftData + SwiftData Group Lab Recap

WWDC26 - Japan-\(region).swift 登壇資料

Transcript

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4. struct TripListView: View { @Query(sectionBy: \Trip.destination) var trips: [Trip] var body: some View { List(selection: $selection) { if _trips.sections.isEmpty { ForEach(trips) { trip in ... } } else { ForEach(_trips.sections) { section in Section(section.id) { ForEach(section) { trip in ... } } } } } } } 
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   let sortDescriptor = SortDescriptor<Trip>(\.mapItemIdentifier?.rawValue) let descriptor = FetchDescriptor<Trip>(sortBy: [sortDescriptor]) let trips = try modelContext.fetch(descriptor) 1SFEJDBUF
   let predicate = #Predicate<Trip> { trip in trip.mapItemIdentifier?.rawValue == "I78E51C9F47CC4F7B" } let descriptor = FetchDescriptor<Trip>(predicate: predicate) let trips = try modelContext.fetch(descriptor) !"UUSJCVUF DPEBCMF 
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   let sortDescriptor = SortDescriptor<Trip>(\.mapItemIdentifier!.rawValue) let descriptor = FetchDescriptor<Trip>(sortBy: [sortDescriptor]) let trips = try modelContext.fetch(descriptor) 1SFEJDBUF
   let predicate = #Predicate<Trip> { trip in trip.mapItemIdentifier!.rawValue == "I78E51C9F47CC4F7B" } let descriptor = FetchDescriptor<Trip>(predicate: predicate) let trips = try modelContext.fetch(descriptor) ͲͪΒ΋GFUDI࣌ʹ࣮ߦ࣌Τϥʔ
   Thread 1: Fatal error: Failed to validate \Trip.mapItemIdenti fi er!.rawValue because rawValue is not a member of MKMapItemIdenti fi er !"UUSJCVUF DPEBCMF 
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9. @Observable @MainActor final class MapCameraController { private let resultsObserver: ResultsObserver<Trip, Never> var bounds: MapCameraBounds? private var token: ObservationTracking.Token? init(modelContext: ModelContext) throws { resultsObserver = try ResultsObserver<Trip, Never>(modelContext: modelContext) token = withContinuousObservation(options: [.didSet]) {[weak self], event in self?.bounds = self?.calculateBounds(trips: resultsObserver.results) } } private func calculateBounds(trips: [Trip]) -> MapCameraBounds? { / * */ } } 3FTVMUT0CTFSWFS
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12. @SyncActor final class ServerSync { private let observer: HistoryObserver private var token: ObservationTracking.Token? func start() throws { self.observer = try HistoryObserver(authors: ["App"], modelContainer: modelContainer) token = withContinuousObservation(options: .didSet) {[weak self] _ in _ = self?.observer.eventCounter self?.processChanges() } } private func processChanges() { // Fetch and process history transactions } } )JTUPSZ0CTFSWFS
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