MAUI IOS 是否可以每 15 秒发送一次本地通知

Question

嗨，我的要求是我想从 APi 读取数据，如果数据可用，我想发送本地通知，否则不发送本地通知。即使应用程序处于关闭状态或后台。

public static void ScheduleLocalNotifications()
{
 // Request permission to display alerts and play sounds.
 UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound, async (granted, error) =>
 {
     if (granted)
     {
         //NotificationsData data = await GlobalParams.ReadNotification();
         int rem = new Random().Next(1, 100);
         //foreach (var item in data.resultnew)
         //{
             string StatusTxt = string.Empty;
             
             // Your notification content
             var content = new UNMutableNotificationContent
             {
                 Title = "Activated",
                 Body = "Next No: "+rem,
                 Sound = UNNotificationSound.Default
             };

             // Trigger to repeat every 5 minutes
             var trigger = UNTimeIntervalNotificationTrigger.CreateTrigger(120, true);

             // Create a notification request
             var request = UNNotificationRequest.FromIdentifier("FiveMinuteNotification", content, trigger);

             // Schedule the notification
             UNUserNotificationCenter.Current.AddNotificationRequest(request, (err) =>
             {
                 if (err != null)
                 {
                     //Console.WriteLine($"Error scheduling notification: {err.LocalizedDescription}");
                 }
                 
             });
         //}
     }
     else
     {
         
     }
 });
}

我尝试了上面的代码，但每次发送相同的消息时它都没有更新通知消息

Answer 1

我使用你的代码来推送通知。具体来说，将

ScheduleLocalNotifications()

方法绑定到按钮的单击事件。点击按钮后，将应用程序置于后台，稍后会收到通知：

        notifyButton.Clicked += (sender, e) =>
        {
            ScheduleLocalNotifications();
        };

您收不到的原因可能是您设置的通知推送间隔太长（120表示120秒，可能您在收到通知之前急于关闭程序）。建议您尝试设置较短的时间间隔，或者耐心等待两分钟