I was dealing with this same issue in some older Objective-C code I was trying to update. After lots of different attempts I found the following solution (Swift version): if let token = FileManager.default.ubiquityIdentityToken {     do {         let data = try NSKeyedArchiver.archivedData(withRootObject: token, requiringSecureCoding: true)         if let newToken = try NSKeyedUnarchiver.unarchivedObject(ofClass: NSData.self, from: data) {             print("We got the token")             if newToken.isEqual(token) {                 print("tokens match")             } else {                 print("tokens do not match")             }         }     } catch {         print("oops: ", error)     } } This works and it compiles cleanly. But I'm worried that passing in NSData.self could possibly fail in some future implementation if Apple changes how the token is encoded.

I have recently found that the message assigned to the NSUserNotificationsUsageDescription key is ignored on some devices and works as desired on others. In my tests it worked correctly on a device running iOS 15.5 but the generic message was shown on a device running iOS 14.8.1. My tests were with Xcode 13.4.