Core Data vs SwiftData 对比

// Core Data - 待办事项列表 CRUD
import CoreData

class TodoRepository {
    let container: NSPersistentContainer

    init() {
        container = NSPersistentContainer(name: "TodoModel")
        container.loadPersistentStores { _, error in
            if let error { fatalError("Failed: \(error)") }
        }
    }

    func addTodo(title: String) {
        let context = container.viewContext
        let todo = Todo(context: context)
        todo.title = title
        todo.createdAt = Date()
        try? context.save()
    }

    func fetchTodos() -> [Todo] {
        let request = Todo.fetchRequest()
        request.sortDescriptors = [NSSortDescriptor(keyPath: \Todo.createdAt, ascending: false)]
        return (try? container.viewContext.fetch(request)) ?? []
    }
}

// SwiftData - 待办事项列表 CRUD
import SwiftData

@Model
class Todo {
    var title: String
    var createdAt: Date

    init(title: String) {
        self.title = title
        self.createdAt = Date()
    }
}

struct TodoListView: View {
    @Query(sort: \Todo.createdAt, order: .reverse) private var todos: [Todo]
    @Environment(\.modelContext) private var context

    func addTodo(title: String) {
        let todo = Todo(title: title)
        context.insert(todo)
        try? context.save()
    }
}