Initial Commit

CHDataManagement/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

CHDataManagement/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "512x512"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "512x512"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

CHDataManagement/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

CHDataManagement/CHDataManagement.entitlements

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.security.app-sandbox</key>
+    <true/>
+    <key>com.apple.security.files.user-selected.read-only</key>
+    <true/>
+</dict>
+</plist>

CHDataManagement/CHDataManagementApp.swift

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+//
+//  CHDataManagementApp.swift
+//  CHDataManagement
+//
+//  Created by CH on 22.06.24.
+//
+
+import SwiftUI
+import SwiftData
+
+@main
+struct CHDataManagementApp: App {
+    var sharedModelContainer: ModelContainer = {
+        let schema = Schema([
+            Item.self,
+        ])
+        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)
+    }
+}

CHDataManagement/ContentView.swift

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+//
+//  ContentView.swift
+//  CHDataManagement
+//
+//  Created by CH on 22.06.24.
+//
+
+import SwiftUI
+import SwiftData
+
+struct ContentView: View {
+    @Environment(\.modelContext) private var modelContext
+    @Query private var items: [Item]
+
+    var body: some View {
+        NavigationSplitView {
+            List {
+                ForEach(items) { item in
+                    NavigationLink {
+                        Text("Item at \(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))")
+                    } label: {
+                        Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))
+                    }
+                }
+                .onDelete(perform: deleteItems)
+            }
+#if os(macOS)
+            .navigationSplitViewColumnWidth(min: 180, ideal: 200)
+#endif
+            .toolbar {
+#if os(iOS)
+                ToolbarItem(placement: .navigationBarTrailing) {
+                    EditButton()
+                }
+#endif
+                ToolbarItem {
+                    Button(action: addItem) {
+                        Label("Add Item", systemImage: "plus")
+                    }
+                }
+            }
+        } detail: {
+            Text("Select an item")
+        }
+    }
+
+    private func addItem() {
+        withAnimation {
+            let newItem = Item(timestamp: Date())
+            modelContext.insert(newItem)
+        }
+    }
+
+    private func deleteItems(offsets: IndexSet) {
+        withAnimation {
+            for index in offsets {
+                modelContext.delete(items[index])
+            }
+        }
+    }
+}
+
+#Preview {
+    ContentView()
+        .modelContainer(for: Item.self, inMemory: true)
+}

CHDataManagement/Item.swift

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+//
+//  Item.swift
+//  CHDataManagement
+//
+//  Created by CH on 22.06.24.
+//
+
+import Foundation
+import SwiftData
+
+@Model
+final class Item {
+    var timestamp: Date
+    
+    init(timestamp: Date) {
+        self.timestamp = timestamp
+    }
+}

CHDataManagement/Preview Content/Preview Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}