Error: The operation couldn’t be completed. (com.google.fcm error 501)

Question

我正在将我的 Xamarin.iOS 应用与 Firebase 推送通知集成，但收到此 错误错误：操作无法完成。（com.google.fcm 错误 501） 我已添加开发证书 APNS 密钥并满足其他要求但无法获取 FCM 令牌。有人可以帮忙吗？提前谢谢你。

using System;
using Foundation;
using UIKit;
using App.Pages;
using SupportWidgetXF.iOS;
using UserNotifications;
using Firebase.CloudMessaging;
using Firebase.InstanceID;


namespace App.iOS
{
    // The UIApplicationDelegate for the application. This class is responsible for launching the 
    // User Interface of the application, as well as listening (and optionally responding) to 
    // application events from iOS.
    [Register("AppDelegate")]
    public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate, IUNUserNotificationCenterDelegate, IMessagingDelegate
    {
        //
        // This method is invoked when the application has loaded and is ready to run. In this 
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //

        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            UIApplication.SharedApplication.RegisterForRemoteNotifications();
            Rg.Plugins.Popup.Popup.Init();
            ZXing.Net.Mobile.Forms.iOS.Platform.Init();
            global::Xamarin.Forms.Forms.Init();
           // Firebase.Core.App.Configure();
            // get permission for notification

            //  SupportWidgetXFSetup.Initialize(this);
            LoadApplication(new App());
            if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
            {
                // iOS 10 or later
                var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
                UNUserNotificationCenter.Current.RequestAuthorization(authOptions, (granted, error) => {
                    Console.WriteLine(granted);
                });

                // For iOS 10 display notification (sent via APNS)
                UNUserNotificationCenter.Current.Delegate = this;
                Messaging.SharedInstance.Delegate = this;
                var toke = Messaging.SharedInstance.FcmToken;
                var tokenx = Messaging.SharedInstance.ApnsToken;
                string token = InstanceId.SharedInstance.Token;

                //  var token = Messaging.SharedInstance.FcmToken;

                // For iOS 10 data message (sent via FCM)
            }
            else
            {
                // iOS 9 or before
                var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
                var settings = UIUserNotificationSettings.GetSettingsForTypes(allNotificationTypes, null);
                UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
            }

            InstanceId.Notifications.ObserveTokenRefresh((sender, e) => {
                var newToken = InstanceId.SharedInstance.Token;
                // if you want to send notification per user, use this token
                System.Diagnostics.Debug.WriteLine(newToken);

                connectFCM();
            });            

            string fcm = Messaging.SharedInstance.FcmToken;
        //    Messaging.SharedInstance.ShouldEstablishDirectChannel = true;

           // PushNotificationManager.Initialize(options, true);
            return base.FinishedLaunching(app, options);
        }

        public void DidReceiveRegistrationToken(Messaging messaging, string fcmToken)
        {
            Console.WriteLine($"Firebase registration token: {fcmToken}");
            // Dependency.DataManager.FCMToken = fcmToken;
        }
        [Export("messaging:didRefreshRegistrationToken:")]
        public void DidRefreshRegistrationToken(Messaging messaging, string fcmToken)
        {
            System.Diagnostics.Debug.WriteLine( $" FCM Token: { fcmToken } ");
        }
        public override void DidEnterBackground(UIApplication uiApplication)
        {
            Messaging.SharedInstance.Disconnect();
        }

        public override void OnActivated(UIApplication uiApplication)
        {
            connectFCM();
            base.OnActivated(uiApplication);
        }

        public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
        {
#if DEBUG
            //InstanceId.SharedInstance.SetApnsToken(deviceToken, Firebase.InstanceID.ApnsTokenType.Sandbox);
#endif
#if RELEASE
            Firebase.InstanceID.InstanceId.SharedInstance.SetApnsToken(deviceToken, Firebase.InstanceID.ApnsTokenType.Prod);
#endif
        }

        // iOS 9 <=, fire when recieve notification foreground
        public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
        {
            Messaging.SharedInstance.AppDidReceiveMessage(userInfo);

            // Generate custom event
            NSString[] keys = { new NSString("Event_type") };
            NSObject[] values = { new NSString("Recieve_Notification") };
            var parameters = NSDictionary<NSString, NSObject>.FromObjectsAndKeys(keys, values, keys.Length);

            // Send custom event
            //Firebase.Analytics.Analytics.LogEvent("CustomEvent", parameters);

            if (application.ApplicationState == UIApplicationState.Active)
            {
                System.Diagnostics.Debug.WriteLine(userInfo);
                var aps_d = userInfo["aps"] as NSDictionary;
                var alert_d = aps_d["alert"] as NSDictionary;
                var body = alert_d["body"] as NSString;
                var title = alert_d["title"] as NSString;
                debugAlert(title, body);
            }
        }

        // iOS 10, fire when recieve notification foreground
        [Export("userNotificationCenter:willPresentNotification:withCompletionHandler:")]
        public void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
        {
            var title = notification.Request.Content.Title;
            var body = notification.Request.Content.Body;
            debugAlert(title, body);
        }

        private void connectFCM()
        {
            Firebase.Core.App.Configure();
           // Messaging.SharedInstance.ShouldEstablishDirectChannel = true;
            Messaging.SharedInstance.Connect((error) =>
            {
                if (error == null)
                {
                    Messaging.SharedInstance.Subscribe("/topics/all");
                }
                System.Diagnostics.Debug.WriteLine(error != null ? "error occured" : "connect success");
            });
        }

        private void debugAlert(string title, string message)
        {
            var alert = new UIAlertView(title ?? "Title", message ?? "Message", null, "Cancel", "OK");
            alert.Show();
        }

    }
}

Answer 1

问题是我在模拟器上测试，但是当我在物理设备上测试时。有用。但是，我将我的配置文件切换到另一个而不是将其设置回去可能会有所帮助的一件事可能是解决了这个问题，现在它也在模拟器上工作了。

Error: The operation couldn’t be completed. (com.google.fcm error 501)

Error: The operation couldn’t be completed. (com.google.fcm error 501)

xamarin.ios

xamarin

firebase-cloud-messaging