swift-snippet-14.swift

// Snippet

typealias AlertActionHandler = ((UIAlertAction) -> Void)

extension UIAlertControllerStyle {

	func controller(title: String, message: String, actions: [UIAlertAction]) -> UIAlertController {
		let _controller = UIAlertController(
			title: title,
			message: message,
			preferredStyle: self
		)
		actions.forEach { _controller.addAction($0) }
		return _controller
	}
}

extension String {

	func alertAction(style: UIAlertActionStyle = .default, handler: AlertActionHandler? = nil) -> UIAlertAction {
		return UIAlertAction(title: self, style: style, handler: handler)
	}
}

// Usage

let noInternetAlertController = UIAlertControllerStyle.alert.controller(
	title: "No Internet",
	message: "Something went wrong, please try again!",
	actions: [
		"Dismiss".alertAction(), 
		"Retry".alertAction { _ in /* retry logic */ }
	])

viewController.present(noInternetAlertController, animated: true)