hi ,I am a new developer ,I know use SwiftUI to develop the client ,but how to develop the backend ? app have two part : client and server ,is it right ? I need someone help me . I look forward to your answer.
How to develop the server of app ?
I'm not sure if I've understood you correctly (maybe you're after App Store Server information), but here goes:
SwiftUI apps typically consist of a number of Views (i.e. the User Interface) and a single Data Model, which handles all of the data processing logic. The Data Model might also interact with a server to store and/or retrieve data. One of my complex apps has servers for SQLite, iCloud, BlueTooth devices and Home Appliances. The Data Model handles all of these servers, consolidating data as required for use by the SwftUI View(s).
The Data Model acts as the single point of truth throughout the app: all SwiftUI Views should normally get their UI output from the Data Model and provide UI input (e.g. keyboard input) to the Data Model for processing. SwiftUI monitors for changes to the Data Model, according to developer specified configuration, in order to update the relevant View(s). A simple example of this arrangement is in my answer to this post https://developer.apple.com/forums/thread/685018, which uses Core Motion data to report user activity. The @StateObject var dataModel = DataModel() line in the App View ensures that there's only one copy of dataModel throughout the app, provided conventions for .environmentObject(dataModel) are followed.
This Developer document https://developer.apple.com/documentation/swiftui/managing-model-data-in-your-app describes how to manage Model Data.
Regards, Michaela