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

Throwing my answer on the pile. Avoid using string parsing; It's not guaranteed by the docs that NSData.description will always work that way.

Swift 3 Implementation:

extension Data {
    func hexString() -> String {
        var bytesPointer: UnsafeBufferPointer = UnsafeBufferPointer(start: nil, count: 0)
        self.withUnsafeBytes { (bytes) in
            bytesPointer = UnsafeBufferPointer(start: UnsafePointer(bytes), count:self.count)
        }
        let hexBytes = bytesPointer.map { return String(format: "%02hhx", $0) }
        return hexBytes.joined()
    }
}