Hey guys I hope you are all doing well I have work to do, I'm working on a mobile application in C#, and I want to receive notifications received on my phone and display them in my application

here is a demonstration image : enter image description here

CodePudding user response：

If you want to develop your own notification service, I recommend you to use SignalR, subscribe to notifications in Xamarin, and use custom Popup to display content.

CodePudding user response：

From my perspective,you could use local Notifications to achieve this function.

1.Create a cross-platform interface

public interface INotificationManager
{
    event EventHandler NotificationReceived;
    void Initialize();
    void SendNotification(string title, string message, DateTime? notifyTime = null);
    void ReceiveNotification(string title, string message);
}

2.For iOS,create the iOS interface implementation,below is the Pseudo code, for more details, please refer to the sample code.

namespace LocalNotifications.iOS
{
    public class iOSNotificationManager : INotificationManager
    { 
        public void Initialize()
        {
            // request the permission to use local notifications
            UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert, (approved, err) =>
            {
                hasNotificationsPermission = approved;
            });
        }

        public void SendNotification(string title, string message, DateTime? notifyTime = null)
        {
            // EARLY OUT: app doesn't have permissions
            if (!hasNotificationsPermission)
            {
                return;
            }

            UNNotificationTrigger trigger;
            if (notifyTime != null)
            {
                // Create a calendar-based trigger.
                trigger = UNCalendarNotificationTrigger.CreateTrigger(GetNSDateComponents(notifyTime.Value), false);
            }
            else
            {
                // Create a time-based trigger, interval is in seconds and must be greater than 0.
                trigger = UNTimeIntervalNotificationTrigger.CreateTrigger(0.25, false);
            }

        }
     
    }
}

3.And then Handle incoming notifications on iOS.

public class iOSNotificationReceiver : UNUserNotificationCenterDelegate
{
    public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
    {
     
    }

    void ProcessNotification(UNNotification notification)
    {
     //uses the DependencyService to get an instance of the iOSNotificationManager class
    }    
}

4.Last but not least,The AppDelegate class must specify an iOSNotificationReceiver object as the UNUserNotificationCenter delegate during application startup.

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

    UNUserNotificationCenter.Current.Delegate = new iOSNotificationReceiver();

    LoadApplication(new App());
    return base.FinishedLaunching(app, options);
}