Xamarin.IOS 不接收 firebase 通知但注册 fcmToken

Posted 2023-04-18

【中文标题】Xamarin.IOS 不接收 firebase 通知但注册 fcmToken

【英文标题】：Xamarin.IOS does not receive firebase notifications but registers fcmToken

【发布时间】：2021-10-03 06:29:06

【问题描述】：

您好，我需要一些建议，这可能是什么原因导致我的通知被发送但我从未在手机上收到它们，而且它在物理设备上调试过 -> iPhone X (14.3)。

我已关注这篇文章 https://github.com/xamarin/GoogleApisForiosComponents/blob/main/docs/Firebase/CloudMessaging/GettingStarted.md 在 IOS 上实现 firebase 通知。

我将 APNs 身份验证密钥添加到从我的开发者帐户下载的 firebase。

我在 info.plist 中添加了

属性 FirebaseMessagingAutoInitEnabled -> 否 选择启用后台模式和选择远程通知

在 GoogleService-Info.plist 构建操作 -> 捆绑资源

我仔细检查了我的 bundle_id，我的项目和 GoogleService-Info 中的相同。

在 Entitlements.plist 中选择远程通知

这是我的 AppDelegate.cs

[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate, IUNUserNotificationCenterDelegate, IMessagingDelegate

    private App app;

    public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    
        Rg.Plugins.Popup.Popup.Init();
        global::Xamarin.Forms.Forms.Init();

        DependencyService.Register<ILocalStorageManager, LocalStorageManager>();
        DependencyService.Register<ILauncherService, LauncherService>();

        LoadApplication(new App());

        Firebase.Core.App.Configure();
        // Register your app for remote notifications.
        if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
        

            // For iOS 10 display notification (sent via APNS)
            UNUserNotificationCenter.Current.Delegate = this;

            var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
            UNUserNotificationCenter.Current.RequestAuthorization(authOptions, (granted, error) => 
                Console.WriteLine(granted);
            );
        
        else
        
            // iOS 9 or before
            var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
            var settings = UIUserNotificationSettings.GetSettingsForTypes(allNotificationTypes, null);
            UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
        

        UIApplication.SharedApplication.RegisterForRemoteNotifications();



        Messaging.SharedInstance.Delegate = this;

        var token = Messaging.SharedInstance.FcmToken ?? "";
        Console.WriteLine($"FCM token: token");

        return base.FinishedLaunching(app, options);
    

    [Export("messaging:didReceiveRegistrationToken:")]
    public void DidReceiveRegistrationToken(Messaging messaging, string fcmToken)
    
        Console.WriteLine($"Firebase registration token: fcmToken");

        // TODO: If necessary send token to application server.
        // Note: This callback is fired at each app startup and whenever a new token is generated.
    

    public override void ReceivedRemoteNotification(UIApplication application, NSDictionary userInfo)
    
        // If you are receiving a notification message while your app is in the background,
        // this callback will not be fired till the user taps on the notification launching the application.
        // TODO: Handle data of notification

        // With swizzling disabled you must let Messaging know about the message, for Analytics
        //Messaging.SharedInstance.AppDidReceiveMessage (userInfo);

        // Print full message.
        Console.WriteLine(userInfo);
    

    public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
    
        // If you are receiving a notification message while your app is in the background,
        // this callback will not be fired till the user taps on the notification launching the application.
        // TODO: Handle data of notification

        // With swizzling disabled you must let Messaging know about the message, for Analytics
        //Messaging.SharedInstance.AppDidReceiveMessage (userInfo);

        // Print full message.
        Console.WriteLine(userInfo);

        completionHandler(UIBackgroundFetchResult.NewData);
    

    // Receive displayed notifications for iOS 10 devices.
    // Handle incoming notification messages while app is in the foreground.
    [Export("userNotificationCenter:willPresentNotification:withCompletionHandler:")]
    public void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
    
        var userInfo = notification.Request.Content.UserInfo;

        // With swizzling disabled you must let Messaging know about the message, for Analytics
        //Messaging.SharedInstance.AppDidReceiveMessage (userInfo);

        // Print full message.
        Console.WriteLine(userInfo);

        // Change this to your preferred presentation option
        completionHandler(UNNotificationPresentationOptions.None);
    

    // Handle notification messages after display notification is tapped by the user.
    [Export("userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:")]
    public void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler)
    
        var userInfo = response.Notification.Request.Content.UserInfo;

        // Print full message.
        Console.WriteLine(userInfo);

        completionHandler();
    

在控制台中，它会生成我的 FCM 令牌，当我尝试从 Firebase 控制台发送通知时，控制台中没有打印任何内容，但它表示已完成。然后我尝试从邮递员发送它，我收到了下一条消息。

"multicast_id": 5300302940762876386,
"success": 1,
"failure": 0,
"canonical_ids": 0,
"results": [
    
        "message_id": "0:1627386458132596%db948e52db948e52"
    
]

我的 nugget 包 IOS.CloudMessaging、IOS.Core、iOS.Installations 和 iOS.IstanceID 是最新的。

【参考方案1】：

我发现了我的问题。

我重写了 FailedToRegisterForRemoteNotifications 并看到它抛出了

“没有为应用程序找到有效的“aps-environment”权利字符串”

我检查了 info.plist 中的包标识符是否正常，但在我的 xCode 项目中是错误的，这解决了我的问题。