Swift 3 - device tokens are now being parsed as &#

Question

I just updated from Xcode 7 to the 8 GM and amidst the Swift 3 compatibility issues I noticed that my device tokens have stopped working. They now only read '32BYTES'.

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data)
{
    print(deviceToken) // Prints '32BYTES'
    print(String(data: deviceToken , encoding: .utf8)) // Prints nil
}

Before the update I was able to simply send the NSData to my server, but now I'm having a hard time actually parsing the token.

What am I missing here?

Edit: I just testing converting back to NSData and I'm seeing the expected results. So now I'm just confused about the new Data type.

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data)
{
    print(deviceToken) // Prints '32BYTES'
    print(String(data: deviceToken , encoding: .utf8)) // Prints nil

    let d = NSData(data: deviceToken)
    print(d) // Prints my device token
}

Answer 1

Here is my Swift 3 extension to get a base-16 encoded hex string:

extension Data {
    var hexString: String {
        return map { String(format: "%02.2hhx", arguments: [$0]) }.joined()
    }
}

Answer 2

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

    let token = deviceToken.map({ String(format: "%02.2hhx", $0)}).joined()
     print("TOKEN: " + token)


}

Answer 3

Get device token with proper format.

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) 
{
            var formattedToken = ""
            for i in 0..<deviceToken.count {
                formattedToken = formattedToken + String(format: "%02.2hhx", arguments: [deviceToken[i]])
            }
            print(formattedToken)
}

Answer 4

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    let token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
    print(token)
}

Answer 5

Try this:

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

   let token = String(data: deviceToken.base64EncodedData(), encoding: .utf8)?.trimmingCharacters(in: CharacterSet.whitespaces).trimmingCharacters(in: CharacterSet(charactersIn: "<>")) 
}

Answer 6

I had the same problem. This is my solution:

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    var token = ""
    for i in 0..<deviceToken.count {
        token = token + String(format: "%02.2hhx", arguments: [deviceToken[i]])
    }
    print(token)
}