如何在后台应用时显示Xamarin iOS中的徽章数量

Question

任何人都可以在Xamarin iOS中向我提出任何关于在背景中应用时显示徽章计数的想法

实际上在背景中，当通知到来时，Xamarin iOS中没有任何方法触发器。

Answer 1

public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
{
    #region Constructors
    public UserNotificationCenterDelegate()
    {
    }
    #endregion

    #region Override Methods
    public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
    {
           /// here we can add badge 

    }
}

*****************
public override bool FinishedLaunching(UIApplication uiApplication, NSDictionary launchOptions)
    {

      UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
       ----------
       ------------

}