How to return string value in completionHandler?

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I have a completionHandler of type UNNotificationPresentationOptions, Now I want to return string value, instead of .alert.

I want to show Arabic text in my notification, So I want to set msg value in completionHandler

    @available(iOS 10, *)
    extension AppDelegate : UNUserNotificationCenterDelegate {

        // Receive displayed notifications for iOS 10 devices.
        func userNotificationCenter(_ center: UNUserNotificationCenter,
                                    willPresent notification: UNNotification,
                                    withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
            let userInfo = notification.request.content.userInfo
            print(userInfo)

            let userInfoa = notification.request.content
            let sd = userInfoa.title

            if let jsonResult = userInfo as? Dictionary<String, AnyObject> {


            var msg = ""
            if let aps_Data = userInfo as? Dictionary<String, AnyObject> {
                if let ar_message = aps_Data["gcm.notification.body_ar"] {

                    print(ar_message)
                    msg = ar_message as! String

                }
            }
            let content:UNNotificationPresentationOptions = msg

            completionHandler([content])

          //completionHandler([.alert]) .  *I dont want use  .alert



        }

        }
    }
1 Answers

Look to declaration

@available(iOS 10.0, *)
public struct UNNotificationPresentationOptions : OptionSet {

   public init(rawValue: UInt)


  public static var badge: UNNotificationPresentationOptions { get }

  public static var sound: UNNotificationPresentationOptions { get }

  public static var alert: UNNotificationPresentationOptions { get }
}

these are types of permissions .alert /.sound/.badge , you can't change delegate method signature to what you want , it's main purpose is to return the permissions that system will trigger for this coming notification

//

You can use notification service && content extension

enter image description here

Implement your edits here

override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

    if let bestAttemptContent = bestAttemptContent {
        // Modify the notification content here...
        bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"

        contentHandler(bestAttemptContent)
    }
}
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