In iOS Development, it is frequently required to provide alerts to users. This is a code snippet that I developed that I now use in all of my applications. Feel free to use and adapt it to your needs.

import UIKit

/** Easily Create, Customize, and Present an UIAlertController on a UIViewController

 - Parameters:
    - target: The instance of a UIViewController that you would like to present the UIAlertController upon.
    - title: The `title` for the UIAlertController.
    - message: Optional `message` field for the UIAlertController. nil by default
    - style: The `preferredStyle` for the UIAlertController. UIAlertControllerStyle.alert by default
    - actionList: A list of `UIAlertAction`. If no action is added, `[UIAlertAction(title: "OK", style: .default, handler: nil)]` will be added.

func showAlert(target: UIViewController, title: String, message: String? = nil, style: UIAlertControllerStyle = .alert, actionList:[UIAlertAction] = [UIAlertAction(title: "OK", style: .default, handler: nil)] ) {

	DispatchQueue.main.async {
		let alert = UIAlertController(title: title, message: message, preferredStyle: style)
		for action in actionList {
		// Check to see if the target viewController current is currently presenting a ViewController
		if target.presentedViewController == nil {
			target.present(alert, animated: true, completion: nil)