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All apps have to interact with a user at one time or another.  Ever since Swift 3, app developers must use the UIAlertController to accomplish this.  Here’s an example of one that I use in my apps:

let title = “Pop-up Message Example”

let message = “This is an example of a pop-up message in Swift.”

let button = “Close”

let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.alert)

alert.addAction(UIAlertAction(title: button, style: UIAlertAction.Style.default, handler: {(action:UIAlertAction!) in

}))

self.present(alert, animated: true, completion: nil)

}

When I make an UIAlertController, I like to organize it so I can quickly look at a block of code.  This example will show a pop-up window with the title “Pop-up Message Example” and then show a message under it.

For more information about UIAlertController, click here.

Do you have questions?  Please ask them below.