swift 3.0 Data to String?

Question

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

I want deviceToken to string

but:

let str = String.init(data: deviceToken, encoding: .utf8) 

str is nil

swift 3.0

how can I let data to string ?

Registering for Push Notifications in Xcode 8/Swift 3.0? not working and the answer is a few months ago, I had tried it:

and print:

Answer 1

I came looking for the answer to the Swift 3 Data to String question and never got a good answer. After some fooling around I came up with this:

var testString = "This is a test string" var somedata = testString.data(using: String.Encoding.utf8) var backToString = String(data: somedata!, encoding: String.Encoding.utf8) as String! 

Answer 2

here is my data extension. add this and you can call data.ToString()

import Foundation  extension Data {     func toString() -> String?     {         return String(data: self, encoding: .utf8)     } }