A Tour of UIUserNotificationAction

AppDelegate.swift

import UIKit

enum Notifications {
    enum Categories: String {
        case Message
    }

    enum Actions: String {
        case RemindMeLater
        case Reply
    }
}

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func registerForNotifications(application: UIApplication) {
        let snoozeAction = UIMutableUserNotificationAction()
        snoozeAction.identifier = Notifications.Actions.RemindMeLater.rawValue
        snoozeAction.title = "Remind Me Later"
        snoozeAction.activationMode = .Background // Silently handle this action, .Foreground launches the app

        let replyAction = UIMutableUserNotificationAction()
        replyAction.identifier = Notifications.Actions.Reply.rawValue
        replyAction.title = "Reply"
        replyAction.activationMode = .Background
        replyAction.behavior = .TextInput

        let category = UIMutableUserNotificationCategory()
        category.identifier = Notifications.Categories.Message.rawValue

        /**
            Contexts outlined here: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIUserNotificationCategory_class/index.html#//apple_ref/c/tdef/UIUserNotificationActionContext
            .Default allows for up to four actions, whereas .Minimal allows for two
        */
        category.setActions([snoozeAction, replyAction], forContext: .Default)
        category.setActions([snoozeAction, replyAction], forContext: .Minimal)

        let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: [category])
        application.registerUserNotificationSettings(settings)
    }

    // MARK: - UIApplicationDelegate

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        registerForNotifications(application)

        return true
    }

    // ...
}

AppDelegateAside.swift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    // ...

    // MARK: - UIApplicationDelegate

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        if let notification = launchOptions?[UIApplicationLaunchOptionsLocalNotificationKey] as? UILocalNotification {
            // Handle launch from local notification
        }

        // ...

        return true
    }

    // ...
}

AppDelegateContinued.swift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    // ...

    func application(application: UIApplication, handleActionWithIdentifier identifier: String?, forLocalNotification notification: UILocalNotification, withResponseInfo responseInfo: [NSObject : AnyObject], completionHandler: () -> Void) {
        defer { completionHandler() }
        guard let identifier = identifier, let action = Notifications.Actions(rawValue: identifier) else { return }

        switch action {
        case .RemindMeLater:
            print("Handle remind me later case!")
        case .Reply:
            if let replyText = responseInfo[UIUserNotificationActionResponseTypedTextKey] as? String {
                // Use replyText for desired action
            }
        }
    }

    // ...
}

NotificationScheduler.swift

import UIKit
import Timepiece

class NotificationScheduler {
    // ...

    static func scheduleSampleNotification() {
        let notification = UILocalNotification()

        notification.fireDate = NSDate() + 5.seconds
        notification.timeZone = .localTimeZone()
        notification.alertBody = "Test message!"
        notification.category = Notifications.Categories.Message.rawValue

        UIApplication.sharedApplication().scheduleLocalNotification(notification)
    }
}