Could you post the code of the pageViewController ? There could be a delegate func in which to insert a very short (0.2 s) pause, like this func:     func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) { } But I would need to see the code to confirm.

Is this a question as a developer (the purpose of the forum) ? You'd probably better file a bug report.

Please explain exactly the problem. Did you download without problem ? from which website ? during installation, does it crash, does it stops, does it anything else ? do you get error message ? Which ? Have you check you have enough disk space (100 GB typically) available ?

What you can do is download directly Xcode 12.4: https://developer.apple.com/download/more/ Search for Xcode 12.4

@eskimo Waoouh

You could also group both actions in a single one, if tou define a property in the class : private var viewMoved = false @IBAction func beginEditing(_ sender: Any) { self.view.setNeedsLayout() UIView.animate(withDuration: 0.2, animations: { self.view.center.y += self.viewMoved ? -150 : 150 }, completion: { finished in self.viewMoved.toggle() }) } And connect the beginEditing and endEditing events for both TextField and TextView to this IBAction. However, I do not recommend such a design, harder to understand.

A first way to do is to create an IBAction with sender as Any:  @IBAction func beginEditing(_ sender: Any) { self.view.setNeedsLayout() UIView.animate(withDuration: 0.2, animations: { self.view.center.y -= 150 }, completion: { finished in }) } And connect in IB (connections inspector), the sent event "Editing Did Begin" to this IBAction, for both TextField and TextView. Do similar for end editing. Another way (I personally prefer) is to use keyboard notifications. Register the top view to those notifications. Create func to respond to those notifications:     @objc func keyboardWillShow(_ note : Notification) - Void { } and     @objc func keyboardWillHide(_ sender: Notification) { }

Where do you do this ? If need to change a tabBar item, you should not in the UITabBarController, but in each UIViewController, in its viewDidload and viewWillDisappear for instance. The initial definition should be done in IB directly. Select the TabBarItem in each UIViewController Set the image in the Tab Bar Item section of Attributes Inspector. Same thing for selected Image. And you can define the default image (image) in bar Item as well. If that does not work, please explain more in detail the problem. If that's OK don't forget to mark the correct answer to close the thread.

But when I open it from the App Store mostly it works fine Mostly or completely ? Does it work when you launch from Xcode ? What type of app is it ? MacOS App ? Did you notarise your app ? it doesn't loads the xib files properly and while building the project shows errors That's not clear at all: does not load the xib: in Xcode IB or in executable ? Please tell precisely what errors you get. Here you build the project. When you load from appstore, you load the executable. If you loaded on the appstore, that means the app is OK How could you have build errors… Please clarify the context, you are mixing very different things.

Do you define observers in AppDelegate (in appDidFinishLaunching for instance) ? Could you show your code ?

Could you show the code where you set badge value ? You should count yourself the notifications and apply to badge var openedNotifications = 0 myVC.myTabBarItem.badgeValue = String(openedNotifications) Or you could store the notifications in an array, append when new notification, remove from the array when delivered and use .count

Is there any reason why we can't release Have you a problem to release or is it a preventive question ? I don't think there should be any problem. Did you read this: https ://reactnative. dev/docs/publishing-to-app-store

If you use this code it will fail. Correct code is: declare an IBOutlet for the tabBarItem in its respective VC For instance in VC1:     @IBOutlet weak var tabBarItem1: UITabBarItem!   In viewDidload of VC1: tabBarItem1.title = "Myanmar" tabBarItem1.image = UIImage(systemName: "m.square.fill"), tabBarItem1.selectedImage = UIImage(systemName: "m.square") Do the same in other VCs Once again, it is so easier to do it in IB…

This (old) thread tells there is no way to do so with official API: https://stackoverflow.com/questions/22035231/what-api-to-use-to-check-if-user-is-about-to-use-roaming-call But you may probably disable some roaming option: https://developer.apple.com/documentation/devicemanagement/restrictions

Did you try to set a monitoring loop with a timer (a test every 5s for instance), and use getDeliveredNotifications(completionHandler:) to count delivered notifications ? Simple timer example here: https://stackoverflow.com/questions/57237412/run-repeating-function-in-swift