如何获取 Firebase 令牌

Question

如何获取代币价值？我正在使用Firebase，swift3，xcode8

令牌值为零。

import UIKit
import Firebase
class TestViewController: UIViewController {
// FCM Messaging test
    override func viewDidLoad() {
       super.viewDidLoad()
       let token = FIRInstanceID.instanceID().token()
       print("Token is (token)")
}

控制台日志"Token is nil"

Answer 1

我也有同样的问题，我通过添加以下代码解决了它

     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
    {
       NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.tokenRefreshNotification), name: kFIRInstanceIDTokenRefreshNotification, object: nil)
    }

然后

func tokenRefreshNotification(notification: NSNotification) {
     //    NOTE: It can be nil here
           if let token = FIRInstanceID.instanceID().token() {
              refreshedToken = token
                print("InstanceID token: (refreshedToken)")
        }
    }

检查控制台(如果获取令牌(。