I am using xamarin forms for my app. I need to send local notification based on SQLite table for ios. I am using the following code:
AppDelegate.cs:
using System;
using Foundation;
using UIKit;
using Xamarin.Forms;
using Firebase.Database;
using Firebase.CloudMessaging;
using UserNotifications;
using Microsoft.AppCenter.Crashes;
using Plugin.Permissions;
using Plugin.Permissions.Abstractions;
using CoreTelephony;
using Firebase.Auth;
using System.Threading.Tasks;
using System.Collections.Generic;
namespace MyApp.iOS
{
[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate, IUNUserNotificationCenterDelegate, IMessagingDelegate
{
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
global::Xamarin.Forms.Forms.Init();
AppDomain.CurrentDomain.UnhandledException += CurrentDomainOnUnhandledException;
Firebase.Core.App.Configure();
Database.DefaultInstance.PersistenceEnabled = true;
LoadApplication(new MyApp.App());
RegisterForRemoteNotifications();
Messaging.SharedInstance.Delegate = this;
if (UNUserNotificationCenter.Current != null)
{
UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
}
if (UNUserNotificationCenter.Current != null)
{
UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
}
Xamarin.FormsMaps.Init();
UIApplication.SharedApplication.IdleTimerDisabled = true;
UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval(UIApplication.BackgroundFetchIntervalMinimum);
return base.FinishedLaunching(app, options);
}
public override bool ShouldRestoreApplicationState(UIApplication application, NSCoder coder)
{
return true;
}
private async System.Threading.Tasks.Task AcessPermissionsAsync()
{
try
{
await CrossPermissions.Current.RequestPermissionsAsync(Permission.Camera);
}
catch(Exception ex)
{
Crashes.TrackError(ex);
}
}
private void RegisterForRemoteNotifications()
{
if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
UNUserNotificationCenter.Current.RemoveAllPendingNotificationRequests(); // To remove all pending notifications which are not delivered yet but scheduled.
UNUserNotificationCenter.Current.RemoveAllDeliveredNotifications(); // To remove all delivered notifications
}
else
{
UIApplication.SharedApplication.CancelAllLocalNotifications();
}
// 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, async (granted, error) =>
{
Console.WriteLine(granted);
await System.Threading.Tasks.Task.Delay(500);
await AcessPermissionsAsync();
});
}
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();
}
public override void DidEnterBackground(UIApplication uiApplication)
{
Messaging.SharedInstance.ShouldEstablishDirectChannel = false;
}
public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
Messaging.SharedInstance.ApnsToken = deviceToken;
}
[Export("messaging:didReceiveRegistrationToken:")]
public void DidReceiveRegistrationToken(Messaging messaging, string fcmToken)
{
Xamarin.Forms.Application.Current.Properties["Fcmtocken"] = Messaging.SharedInstance.FcmToken ?? "";
Xamarin.Forms.Application.Current.SavePropertiesAsync();
System.Diagnostics.Debug.WriteLine($"######Token###### : {fcmToken}");
DeviceId.FCMTocken = fcmToken;
// TODO: If necessary send token to application server.
// Note: This callback is fired at each app startup and whenever a new token is generated.
}
public override void ReceivedRemoteNotification(UIApplication application, NSDictionary userInfo)
{
// If you are receiving a notification message while your app is in the background,
// this callback will not be fired till the user taps on the notification launching the application.
// TODO: Handle data of notification
// With swizzling disabled you must let Messaging know about the message, for Analytics
// Print full message.
Console.WriteLine(userInfo);
}
public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
try
{
Console.WriteLine(userInfo);
completionHandler(UIBackgroundFetchResult.NewData);
}
catch(Exception ex)
{
Crashes.TrackError(ex);
}
}
public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations(UIApplication application, UIWindow forWindow)
{
switch (Device.Idiom)
{
case TargetIdiom.Phone:
return UIInterfaceOrientationMask.Portrait;
case TargetIdiom.Tablet:
return UIInterfaceOrientationMask.Landscape;
default:
return UIInterfaceOrientationMask.Portrait;
}
}
private void CurrentDomainOnUnhandledException(object sender, UnhandledExceptionEventArgs unhandledExceptionEventArgs)
{
var newExc = new Exception("CurrentDomainOnUnhandledException", unhandledExceptionEventArgs.ExceptionObject as Exception);
ExceptionFileWriter.ToLogUnhandledException(newExc);
}
public void DidRefreshRegistrationToken(Messaging messaging, string fcmToken)
{
Xamarin.Forms.Application.Current.Properties["Fcmtocken"] = Messaging.SharedInstance.FcmToken ?? "";
Xamarin.Forms.Application.Current.SavePropertiesAsync();
System.Diagnostics.Debug.WriteLine($"######Token###### : {fcmToken}");
DeviceId.FCMTocken = fcmToken;
}
public override void PerformFetch(UIApplication application, Action<UIBackgroundFetchResult> completionHandler)
{
try
{
var baseService = new DatabaseServices<object, object>();
baseService.NotificationAssetTrip();
}
catch(Exception ex)
{
Logs.LogCreate("PerformFetch:Exception: " + ex.Message.ToString());
}
completionHandler(UIBackgroundFetchResult.NewData);
}
}
}
UserNotificationCenterDelegate.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Foundation;
using iAd;
using ObjCRuntime;
using UIKit;
using UserNotifications;
namespace MyApp.iOS
{
public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
{
private DBService dataBase;
#region Constructors
public UserNotificationCenterDelegate()
{
UNUserNotificationCenter.Current.Delegate = this;
}
#endregion
#region Override Methods
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
completionHandler.DynamicInvoke(UNNotificationPresentationOptions.Alert);
}
#endregion
}
}
App.xaml.cs:
private void SendNotificationTripAsset(int tripid)
{
//Forexample i have table with columns like title,subtitle,message means, i give like this
var content = new UserNotifications.UNMutableNotificationContent()
{
Title = title,
Subtitle = subtitle,
Body = message,
Badge = 1
};
var request = UserNotifications.UNNotificationRequest.FromIdentifier(list.TripID.ToString(), content, null);
UserNotifications.UNUserNotificationCenter.Current.AddNotificationRequest(request, (err) =>
{
if (err != null)
{
throw new Exception($"Failed to schedule notification: {err}");
}
});
}
But the notification is not trigged after app is killed(terminated). Can anyone please help me to resolve this issue.
