如何用CoreData保存下载的CoreML模型？

// 创建CoreData模型
let model = NSManagedObjectModel.mergedModel(from: nil)!
let persistentContainer = NSPersistentContainer(name: "Model", managedObjectModel: model)
persistentContainer.loadPersistentStores { (_, error) in
    if let error = error {
        print("Failed to load CoreData store: \(error)")
    }
}

// 下载CoreML模型
let modelURL = URL(string: "https://example.com/model.mlmodel")!
let downloadTask = URLSession.shared.downloadTask(with: modelURL) { (location, _, error) in
    guard let location = location else {
        print("Failed to download model: \(error)")
        return
    }
    
    // 将下载的模型保存到CoreData
    let modelData = try! Data(contentsOf: location)
    let entity = NSEntityDescription.entity(forEntityName: "ModelEntity", in: persistentContainer.viewContext)!
    let modelObject = NSManagedObject(entity: entity, insertInto: persistentContainer.viewContext)
    modelObject.setValue(modelData, forKey: "data")
    
    // 保存CoreData上下文
    try! persistentContainer.viewContext.save()
    
    // 加载保存的模型
    let savedModels = try! persistentContainer.viewContext.fetch(ModelEntity.fetchRequest()) as! [ModelEntity]
    if let savedModelData = savedModels.first?.data {
        let savedModel = try! MLModel(contentsOf: savedModelData)
        // 使用保存的模型进行预测等操作
    }
}
downloadTask.resume()