我正在设置推送通知，并且一切顺利，直到我尝试获取 FCM token 以便我可以向实际设备发送测试消息。使用 pod Firebase 5.8.0、FirebaseCore (5.1.3)、FirebaseInstanceID (3.2.1) 和 FirebaseMessaging (3.1.2)，我可以获得 APNS token ，但每次我尝试获取 FCM token 时，它都会出现out 为 nil 或当我使用 InstanceID.instanceID().instanceID(handler:) 时，它会导致一些超时错误代码 1003 和 nil 的结果。 didReceiveRegistrationToken 也不会被调用。我尝试了许多 2017 年的解决方案，但它们要么已弃用，要么不起作用。设置了 MessageDelegate 和 UNUserNotificationCenterDelegate，在功能中启用了推送通知和钥匙串(keychain)共享，通过 p-list 关闭了方法调配，这是我的 didRegisterForRemoteNotificationsWithDeviceToken 函数，我在其中正确获取了 apns token 。有任何想法吗？谢谢。

`public func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    print("Registration Successful: Device token \(deviceToken)")
    Messaging.messaging().apnsToken = deviceToken
    print("Messaging APNS Token:\(Messaging.messaging().apnsToken)")
    print("Instance Id: \(InstanceID.instanceID().token())") //deprecated & returns nil

    print("Messaging APNS Token:\(Messaging.messaging().apnsToken)")
    print("Token:\(Messaging.messaging().fcmToken)") // return nil
    InstanceID.instanceID().instanceID { (result, error) in
        if let result = result {
             print("Result:\(String(describing: result?.token))")
    } else {
            print("Error:\(error))")
    } //returns after about 2 mins with an firebase iid error of 1003

}

最佳答案

请检查以下应用委托(delegate)代码。

import UIKit
import Firebase
import FirebaseMessaging
import UserNotifications


class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {


func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    FirebaseApp.configure()



    //REMOTE NOTIFICATION

    if #available(iOS 10.0, *) {
        // For iOS 10 display notification (sent via APNS)
        UNUserNotificationCenter.current().delegate = self

        let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
        UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
    } else {
        let settings: UIUserNotificationSettings =
            UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
        application.registerUserNotificationSettings(settings)
    }

    application.registerForRemoteNotifications()

    Messaging.messaging().delegate = self

    let token = Messaging.messaging().fcmToken
    print("FCM token: \(token ?? "")")



    //Added Code to display notification when app is in Foreground
    if #available(iOS 10.0, *) {
        UNUserNotificationCenter.current().delegate = self
    } else {
        // Fallback on earlier versions
    }
    return true
}



func application(_ application: UIApplication,
                 didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    Messaging.messaging().apnsToken = deviceToken as Data
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
    // Print full message.
    print(userInfo)
}



// This method will be called when app received push notifications in foreground
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
    completionHandler([UNNotificationPresentationOptions.alert,UNNotificationPresentationOptions.sound,UNNotificationPresentationOptions.badge])
}


// MARK:- Messaging Delegates
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
    InstanceID.instanceID().instanceID { (result, error) in
        if let error = error {
            print("Error fetching remote instange ID: \(error)")
        } else if let result = result {
            print("Remote instance ID token: \(result.token)")
        }
    }
}

    func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
        print("received remote notification")
    }
}

关于ios - Swift 4、Firebase 5.8.0 FCM token 无，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52341856/