How can I convert my device token (NSData) into an NSString?

Question

I am implementing push notifications. I\'d like to save my APNS Token as a String.

- (void)application:(UIApplication *)application
didRegisterForRemoteNotif         


        

Answer 1

I've tried to test two different methods with format "%02.2hhx" and "%02x"

    var i :Int = 0
    var j: Int = 0
    let e: Int = Int(1e4)
    let time = NSDate.timeIntervalSinceReferenceDate
    while i < e {
        _ =  deviceToken.map { String(format: "%02x", $0) }.joined()
        i += 1
    }
    let time2 = NSDate.timeIntervalSinceReferenceDate
    let delta = time2-time
    print(delta)

    let time3 = NSDate.timeIntervalSinceReferenceDate
    while j < e {
        _ =  deviceToken.reduce("", {$0 + String(format: "%02x", $1)})
        j += 1
    }
    let time4 = NSDate.timeIntervalSinceReferenceDate
    let delta2 = time4-time3
    print(delta2)

and the result is that the fastest is "%02x" at average 2.0 vs 2.6 for the reduced version:

deviceToken.reduce("", {$0 + String(format: "%02x", $1)})