Getting exception while integrating Firebase CloudMessaging into Xamarin.iOS project

[Implevista Development team]

Hi there,

I am strugling with a problem while integrating this firebase cloud messaging xamarin component https://components.xamarin.com/view/firebaseioscloudmessaging

into my xamarin.ios project. But I am getting two exceptions for these snippets of code below:

 // For iOS 10 display notification (sent via APNS)

 UNUserNotificationCenter.Current.Delegate = this;

// For iOS 10 data message (sent via FCM)

Messaging.SharedInstance.RemoteMessageDelegate = this;

here "this" can't be converted and getting exception like below:

Error CS0266 Cannot implicitly convert type 'Uno.iOS.AppDelegate' to 'Firebase.CloudMessaging.IMessagingDelegate'. An explicit conversion exists (are you missing a cast?)

Error CS0266 Cannot implicitly convert type 'Uno.iOS.AppDelegate' to 'UserNotifications.IUNUserNotificationCenterDelegate'. An explicit conversion exists (are you missing a cast?)

Can you suggest me how can I fix these two issues?

This is my code where integrating firebase cloud messaging:

public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate

    {

        //

        // 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)

        {

            global::Xamarin.Forms.Forms.Init();

            new SfChartRenderer();

            Firebase.Analytics.App.Configure();

            // Register your app for remote notifications.

            if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))

            {

                /* TODO- will be enable for ios 10 later*/

                // 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;

                // For iOS 10 data message (sent via FCM)

                Messaging.SharedInstance.RemoteMessageDelegate = this;

            }

            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.Connect(error => {

                if (error != null)

                {

                    // Handle if something went wrong while connecting

                }

                else

                {

                    // Let the user know that connection was successful

                }

            });

            var token = InstanceId.SharedInstance.Token;

            // Monitor token generation

            InstanceId.Notifications.ObserveTokenRefresh((sender, e) => {

                // Note that this callback will be fired everytime a new token is generated, including the first

                // time. So if you need to retrieve the token as soon as it is available this is where that

                // should be done.

                var refreshedToken = InstanceId.SharedInstance.Token;

                // Do your magic to refresh the token where is needed

            });

            LoadApplication(new App());

            return base.FinishedLaunching(app, options);

        }

[Krati Chauhan]

Found this link which solved my problem and sharing here for the sake of ppl who reach this discussion first before finding a solution

https://forums.xamarin.com/discussion/86926/firebase-remotemessagedelegate-cant-assign-this-in-xamarin-ios-project-on-appdelegate-file