Xam.Plugins.Notifier not work on IOS 11 - notifications

Question

I am using Xam.Plugins.Notifier package to implement Local Notification in Xamarin.Forms project.
Here is the code what I wrote in PCL project.
CrossLocalNotifications.Current.Show("Title", "Description");
It works good on Android but It doesn't work on IOS.
I am not sure if it works on lower IOS sdk.
Anyway it doesn't work on IOS 11.
Here is the code that I added in AppDelegate.cs
if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
// Ask the user for permission to get notifications on iOS 10.0+
UNUserNotificationCenter.Current.RequestAuthorization(
UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound,
(approved, error) => { });
}
else if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
// Ask the user for permission to get notifications on iOS 8.0+
var settings = UIUserNotificationSettings.GetSettingsForTypes(
UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound,
new NSSet());
UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
}
Can anybody help me to fix it?
I want to have this package working on IOS.
Thanks.

Answer 1

Which scenario does it not work ? Active or in background?
If it doesn't work when it is active , you may forget to handle the delegate (subclasses UNUserNotificationCenterDelegate)
Modify your code as below:
if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
// Ask the user for permission to get notifications on iOS 10.0+
UNUserNotificationCenter.Current.RequestAuthorization(
UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound,
(approved, error) => { });
// Watch for notifications while app is active
UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
}
Create a subclass UserNotificationCenterDelegate
public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
{
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
// Tell system to display the notification anyway or use
// `None` to say we have handled the display locally.
completionHandler(UNNotificationPresentationOptions.Alert);
}
}