如何用SwiftUI和CoreData实现动态列表排序(@FetchRequest)

import CoreData

@objc(MyEntity)
class MyEntity: NSManagedObject {
    @NSManaged var name: String
    @NSManaged var age: Int16
}

import CoreData

class AppDelegate: NSObject, NSApplicationDelegate {
    lazy var persistentContainer: NSPersistentContainer = {
        let container = NSPersistentContainer(name: "MyApp")
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()
    
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
    }
    
    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }
    
    func saveContext() {
        let context = persistentContainer.viewContext
        if context.hasChanges {
            do {
                try context.save()
            } catch {
                let nserror = error as NSError
                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
            }
        }
    }
}

import SwiftUI

struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext
    
    @FetchRequest(
        sortDescriptors: [NSSortDescriptor(keyPath: \MyEntity.name, ascending: true)],
        animation: .default)
    private var entities: FetchedResults<MyEntity>
    
    var body: some View {
        List {
            ForEach(entities) { entity in
                Text(entity.name)
            }
        }
    }
}

import SwiftUI

class SceneDelegate: NSObject, UIWindowSceneDelegate {
    var window: UIWindow?
    
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        let contentView = ContentView().environment(\.managedObjectContext, (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext)
        
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            window.rootViewController = UIHostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }
    }
    
    func sceneDidEnterBackground(_ scene: UIScene) {
        (UIApplication.shared.delegate as? AppDelegate)?.saveContext()
    }
}