How to programmatically dismiss UIAlertController without any buttons?

Question

I\'m presenting an UIAlertViewController without any buttons, as it is supposed to just inform users that uploading is in progress. The app is supposed to upload some files

Answer 1

If you want to post an alert that displays briefly, then dismisses itself, you could use the following method:

  func postAlert(title: String, message: String) {
    let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
    self.present(alert, animated: true, completion: nil)

    // delays execution of code to dismiss
    DispatchQueue.main.asyncAfter(deadline: .now() + 2.0, execute: {
      alert.dismiss(animated: true, completion: nil)
    })
  }

Answer 2

Use the alertController's own method to destroy itself.

UIAlertController *alertController = [UIAlertController 
alertControllerWithTitle:...];

[alertController dismissViewControllerAnimated:YES completion:nil];

Answer 3

for swift you can do:

nameOfYourAlertController.dismiss(animated: true, completion: nil)

true will animate the disappearance, and false will abruptly remove the alert

Answer 4

Generally the parent view controller is responsible for dismissing the modally presented view controller (your popup). In Objective-C you would do something like this in the parent view controller:

[self dismissViewControllerAnimated:YES completion:nil];

The same code in Swift versions < 3 would be:

self.dismissViewControllerAnimated(true, completion: nil)

Swift 3.0:

self.dismiss(animated: true, completion: nil)

Answer 5

Nothing above seemed to work, but here is what works for me perfectly (xcode 10, swift 5). Enjoy!

Step 1: Place this is your viewController Class

    var newQuestionAlert:UIAlertController?

Step 2: Create function to show alert

  func ShowNewQuestionPopup() {
    if newQuestionAlert == nil {
        newQuestionAlert = UIAlertController(title: "Notice", message: "Next Question Starting", preferredStyle: .alert)
        if let newQuestionAlert = newQuestionAlert {
            newQuestionAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
                self.newQuestionAlert = nil
                return
            }))
            self.present(newQuestionAlert, animated: true, completion: nil)
         }
     }
 }

Step 3: Create function to dismiss alert

func autoDismiss() {
    newQuestionAlert?.dismiss(animated: false, completion: nil)
    newQuestionAlert = nil
}

Step 4: Call functions as needed