Improve UIAlertController APIs in the SwiftCatalog sample app

Samples/Catalog/Sources/AlertController.swift

@@ -19,12 +19,85 @@
 import Foundation
 import UIKit
 
+extension UIAlertAction {
+ /// Action types most commonly used
+ public enum ActionType {
+ ///Ok Option
+ case ok
+ /// Default Cancel Option
+ case cancel
+ /// Destructive action with custom title
+ case destructive(String)
+ /// Custom action with title and style
+ case custom(String, UIAlertActionStyle)
+
+ /**
+ Creates the action instance for UIAlertController
+
+ - parameter handler: Call Back function
+ - returns UIAlertAction Instance
+ */
+ public func action(handler: ((String) -> Void)? = nil) -> UIAlertAction {
+ //Default value
+ var actionStyle = UIAlertActionStyle.default
+ var title = ""
+ // Action configuration based on the action type
+ switch self {
+
+ case .cancel:
+ actionStyle = .cancel
+ title = "Cancel"
+
+ case .destructive(let optionTitle):
+ title = optionTitle
+ actionStyle = .destructive
+
+ case .custom(let optionTitle, let style):
+ title = optionTitle
+ actionStyle = style
+
+ default:
+ title = "OK"
+ }
+ //Creating UIAlertAction instance
+ return UIAlertAction(title:title, style:actionStyle) { nativeAction in
+ if let handler = handler {
+ handler(title)
+ }
+ }
+
+ }
+ }
+}
+
 extension UIAlertController {
- convenience init(title: String, message: String) {
- self.init(title: title, message: message, preferredStyle: .alert)
- let action = UIAlertAction(title: NSLocalizedString("OK", comment: "OK action"),
- style: .default,
- handler: nil)
- addAction(action)
+ /**
+ Creates the alert view controller using the actions specified
+
+ - parameter title: Title of the alert.
+ - parameter message: Alert message body.
+ - parameter actions: Variable numbre of actions as an Array of actionType values.
+ - parameter style: UIAlertControllerStyle enum value
+ - parameter handler: Handler block/closure for the clicked option.
+
+ */
+ convenience init(title: String,
+ message: String,
+ actions: UIAlertAction.ActionType?...,
+ style: UIAlertControllerStyle = .alert,
+ handler: ((String) -> Swift.Void)? = nil) {
+
+ //initialize the contoller (self) instance
+ self.init(title: title, message: message, preferredStyle: style)
+
+ if actions.isEmpty {
+ addAction(UIAlertAction.ActionType.ok.action(handler: handler))
+ } else {
+ //Fetching actions specidied by the user and adding actions accordingly
+ for actionType in actions {
+ addAction((actionType?.action(handler: handler))!)
+ }
+ }
+
  }
 }