UIAlertColtroller Demo

step 1: Put UIButton on ViewController.
step 2: Give constraints and IBAction of UIButton.
step 3: In IBAction of UIButton put following code. Like,

@IBAction func AlertButtonPressed(_ sender: UIButton) {

        let alert = UIAlertController(title: APP_NAME, message: "Hello", preferredStyle: .actionSheet)

        

        

        let actionOkay = UIAlertAction(title: "Yes", style: .default) { (action) in

            print("YES")

        }

        

        let actionCan = UIAlertAction(title: "No", style: .cancel) { (action) in

            print("No")

        }

        

        let actionCan1 = UIAlertAction(title: "Delete", style: .destructive) { (action) in

            print("Delete")

        }

       

        alert.addAction(actionCan)

        alert.addAction(actionOkay)

         alert.addAction(actionCan1)

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

    }

Thank you...