Multi language in IOS APN (push notification)

Question

I am working on a booking app. And I would like to send a notification to user when there the booking status is update.

So I write some json in server side like this:

{
  "aps":
  {
    "alert": "update status",
    "category" : "booking approve", //can be "booking cancel" , "booking reject"
  }
}

And in the IOS side

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
  let aps = userInfo["aps"] as! [String: AnyObject]

  // need to customize and create notification message here

}

The problem is , how can I customized the message (according to the user language) after receive the status tag (e.g. booking approve) from the push notification?

Thanks for helping.

Answer 1

You should look at the Remote Notification Payload guide which lists all the key available for the notifications. The one you are looking for is loc-key :

loc-key : A key to an alert-message string in a Localizable.strings file for the current localization (which is set by the user’s language preference). The key string can be formatted with %@ and %n$@ specifiers to take the variables specified in the loc-args array. See Localized Formatted Strings for more information.

Instead of sending a string in a arbitrary chosen language, send this key and the alert will show a translated text, according to the localisations available for your app.

Also, since iOS 8.2, title-loc-key is available for the title displayed in Apple watch when receiving a notification.