@AppStorage is not secure and Core Data is used to manage big amounts of data.

CodePudding user response：

In SwiftUI, there are several ways to save user settings, and the optimal method for your app will depend on the specific requirements of your app. Here are a few common methods for saving user settings in SwiftUI:

• UserDefaults: The UserDefaults class is a convenient way to store small amounts of data such as user settings. UserDefaults stores data in the form of key-value pairs and it is automatically persisted across app launches. It is also easy to use with Swift's property wrappers.

• Property List: A property list is an XML file that contains
  serialized objects. You can use the PropertyListEncoder and
  PropertyListDecoder classes to encode and decode user settings
  objects to property list files. This method is useful if you need to store more complex data structures or larger amounts of data.

• Core Data: Core Data is a framework that allows you to manage the
  model layer of your app. It is particularly useful for saving more
  complex data structures and it is also useful if you plan to
  implement offline support.

• Firebase/Realm: Firebase and Realm are third-party databases that
  allow you to save data in the cloud, they are useful if you plan to
  implement synchronization across multiple devices or if you need to
  share data with other users.

• Keychain: The keychain is a secure storage for small amount of data, it is useful for storing user credentials, and other sensitive
  information.

• AppStorage: to store other types of data, such as structs, arrays and other objects. AppStorage uses UserDefaults under the hood, but it provides a more convenient syntax and automatically conforms to the Codable protocol, so you don't need to manually

  It's important to note that each method has its own advantages and
  disadvantages, and you should choose the one that best suits your
  specific needs.