We cannot see images here…

So you now know the basics. If you want to develop an app, that will not be in playground. Did you study "Intro to App development with Swift" ? At Chapter 5 they start building a real app. If you did, you have now to find the idea for an app. Choose something very simple for the first app, like a quizz. Good continuation.

I don’t know “Intro to App development with Swift”. Where is this? You will find it in Apple Books. Search for "Intro to app"

In case I need in the future, what is the exact format of credentials here ?

OK, that's a bit more complex. have a look here: https://stackoverflow.com/questions/58579410/how-do-i-refresh-my-swiftui-view-when-my-core-data-store-has-been-updated-from-a

This tutorial is well written and should let you do it easily with @EnvironmentObject. https ://www.hackingwithswift. com/quick-start/swiftui/how-to-use-environmentobject-to-share-data-between-views

How to remove that “+” that appears in the upper right corner of the application; Where does it appear ? In the menubar ? In the window of the app ? elsewhere ? How to build the menu, so that you can place calls to the features I need in it; Which menu ? in the menubar ? If so, what is the problem ? in a popup menu ? elsewhere ? Can someone tell me where to find a good example of an app with Core Data, Menu and CRUD operations, using Swift? This is a bit old and objC. But that may give you ideas on the overall architecture. https ://useyourloaf. com/blog/creating-an-os-x-core-data-helper-app/

There is something incorrect in class creation: class NameVC: UIViewController, RegisterNameProtocol { var name: String? let vc3 = VerifyPhoneNumberVC() vc3 is not instantiated. So how do you present it ? You said: The first view presents the second View and the second presents the third view. I do not see this anywhere in code. BTW: your life would me much simpler with storyboard… The details of this func are very important: please show it @objc func goNext() { // The function which presents vc2 name = nametextField.text! print("Name: \(vc3.Username)") // ... }

Option in preferences ? Or elsewhere ? Are you doing this Manually adjust brightness On your Mac, choose Apple menu System Preferences, click Displays, then click Display. Open the Display pane for me. Drag the Brightness slider to adjust the brightness of your display. https://support.apple.com/en-gb/guide/mac-help/mchlp2704/mac Is the keyboard key still working ?

Do as follows: declare a name (give what you want) extension Notification.Name {      public static let kRefresh = Notification.Name("refresh") } In the view that has to receive notification, add observer in viewDidLoad:         NotificationCenter.default.addObserver(self, selector: #selector(refresh), name: .kRefresh, object: nil)  And create the func to handle the notification     @objc func refresh() {      // Update elements you have to update in this receiving view } Hope that's clear. If that's OK, don't forget to close the thread on the correct answer. Otherwise, please tell what you miss. The view sends notification with:         NotificationCenter.default.post(name: .kRefresh, object: self) 

How large is your image (in MB) ? If very large (several MB, I've noticed that may cause problems. Could you describe all the attributes of the image in storyboard content mode, Drawing attributes, constraints…

I did not read your code with enough attention. It is not title but titleLabel.

Which line please do you get the error ? Maybe you should explicit CGFloat type everywhere:     .shadow(color: Color.black.opacity(0.2), radius: CGFloat(10), x: CGFloat(10), y: CGFloat(10))

Which line is line 4 ?

If you set datePicker Style as wheels, localization works. In Automatic, I do not see the shortName… May have a look here, if that may help in anyway. https://developer.apple.com/forums/thread/118198