UIAlertController example

.swift

//We can change preferredStyle: .actionSheet
let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert)

//Add Cancel Action
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler:  nil)

//Add Default Action
alert.addAction(UIAlertAction(title: "Default", style: .default, handler: { (action) in
    print("Default action")
}))
                
//Add Default Action
alert.addAction(UIAlertAction(title: "Destructive", style: .destructive, handler: { (action) in
    print("Destructive action")
}))
                
self.present(alert, animated: true, completion: nil)