Function after presenting Alert Swift

Question

TLDR
Is there a way to be notified before a UIAlert is going to be presented. Is there a viewDidLoad/viewWillLoad type function that can be called in a ViewController either before or after an alert pops up?

My Problem
My View Controller is receiving an alert from a method in my app delegate. My View Controller calls a method in the app delegate which can then send a UIAlert if there was a problem. While this seems like bad design, I can't change it. I need some type of way of knowing that an alert showed up.

Answer 1

You can try

// do before 
self.present(alert,animated:true) {
    // do after
}

Sol1:

Add a completion block when you call the Appdelegate func and inside app delegate return that completion like code above in // do after

Sol2:

set a delegate between app delegate and the VC that calls it

Sol3:

use

 NotificationCenter.default.addObserver(
        self,
        selector: #selector(listenForNotification),
        name: Notification.Name(rawValue: "AlertShowed"),
        object: nil)

inside the VC

and this in Appdelagete alert completion

 NotificationCenter.default.post(name: Notification.Name("AlertShowed"), object:"")