iOS：画像カルーセルプッシュ通知

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    //START Authorize OS Notification Carousel Category
    if #available(iOS 10.0, *) {
        let options: UNAuthorizationOptions = [.alert]
        UNUserNotificationCenter.current().requestAuthorization(options: options) { (authorized, error) in
            if authorized {
                let categoryIdentifier = "OSNotificationCarousel"
                let carouselNext = UNNotificationAction(identifier: "OSNotificationCarousel.next", title: "👉", options: [])
                let carouselPrevious = UNNotificationAction(identifier: "OSNotificationCarousel.previous", title: "👈", options: [])
                let carouselCategory = UNNotificationCategory(identifier: categoryIdentifier, actions: [carouselNext, carouselPrevious], intentIdentifiers: [], options: [])
                UNUserNotificationCenter.current().setNotificationCategories([carouselCategory])
            }
        }
    }
    //END Authorize OS Notification Carousel Category

    return true
}