swiftdata-prepare | ios-app-dev-memo

Core Data on iCloud 準備

プロジェクト作成時

• Storage: SwiftData
• Host in CloudKit : On

あとから iCloud 対応にする場合

• Signing and Capability
  • iCloud 追加
    • CloudKit
  • Background Modes 追加
    • Background fetch?

XxApp

swift

import SwiftUI
import SwiftData

@main
struct SmartListMemoApp: App {
    var sharedModelContainer: ModelContainer = {
        let schema = Schema([
            Item.self, // ← ★ ここに自前のクラス
        ])
        let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)

        do {
            return try ModelContainer(for: schema, configurations: [modelConfiguration])
        } catch {
            fatalError("Could not create ModelContainer: \(error)")
        }
    }()

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        .modelContainer(sharedModelContainer)
    }
}

PersistentModel/

swift

import SwiftUI
import SwiftData

@Model
class Book: Identifiable {
 var id: UUID = UUID()

 var name  : String?  = ""
 var order : Int?     = 0

 init(
  name : String
 ) {
  self.name = name
 }
}

ContentView : NavigationSplitView を使うとして

swift

import SwiftUI

struct ContentView: View {
    var body: some View {
  NavigationSplitView {
   BookListView()
  } content: {
   Text("Directory")
  } detail: {
   Text("Contents")
  }
 }
}

一覧の取得

swift

import SwiftUI
import SwiftData

struct BookListView: View {
 @Environment(\.modelContext) private var modelContext

 @Query private var books: [Book]
 
 @State var selection: Book? = nil

 var body: some View {
  List(books, id: \.self, selection: $selection) { book in
   HStack {
    Image(systemName: "square.fill")
     //.foregroundStyle(Color(cgColor: calendar.cgColor))
    Text(book.name ?? "-")
   }
  }
 }
}