应用程序启动后应立即请求通知权限，方法是将以下代码添加到FinishedLaunching的方法AppDelegate并设置所需的通知类型（UNAuthorizationOptions):
...
using UserNotifications;
...
public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
{
....
//after iOS 10
if(UIDevice.CurrentDevice.CheckSystemVersion(10,0))
{
UNUserNotificationCenter center = UNUserNotificationCenter.Current;
center.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound | UNAuthorizationOptions.UNAuthorizationOptions.Badge, (bool arg1, NSError arg2) =>
{
});
center.Delegate = new NotificationDelegate();
}
else if(UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
var settings = UIUserNotificationSettings.GetSettingsForTypes(UIUserNotificationType.Alert| UIUserNotificationType.Badge| UIUserNotificationType.Sound,new NSSet());
UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
}
return true;
}
iOS 10 的新功能是，当应用程序位于前台并触发通知时，应用程序可以以不同的方式处理通知。通过提供UNUserNotificationCenterDelegate并实施UserNotificationCentermethod，应用程序可以接管显示通知的责任。例如：
using System;
using ObjCRuntime;
using UserNotifications;
namespace workplat
{
public class NotificationDelegate:UNUserNotificationCenterDelegate
{
public NotificationDelegate()
{
}
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
// Do something with the notification
Console.WriteLine("Active Notification: {0}", notification);
// Tell system to display the notification anyway or use
// `None` to say we have handled the display locally.
completionHandler(UNNotificationPresentationOptions.Alert|UNNotificationPresentationOptions.Sound);
}
public override void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler)
{
// Take action based on Action ID
switch (response.ActionIdentifier)
{
case "reply":
// Do something
break;
default:
// Take action based on identifier
if (response.IsDefaultAction)
{
// Handle default action...
}
else if (response.IsDismissAction)
{
// Handle dismiss action
}
break;
}
// Inform caller it has been handled
completionHandler();
}
}
}
要创建并向系统注册自定义操作，请使用以下代码：
public void RegisterNotification(long time)
{
UNUserNotificationCenter center = UNUserNotificationCenter.Current;
//creat a UNMutableNotificationContent which contains your notification content
UNMutableNotificationContent notificationContent = new UNMutableNotificationContent();
notificationContent.Title = "xxx";
notificationContent.Body= "xxxx";
notificationContent.Sound = UNNotificationSound.Default;
UNTimeIntervalNotificationTrigger trigger = UNTimeIntervalNotificationTrigger.CreateTrigger(time, false);
UNNotificationRequest request = UNNotificationRequest.FromIdentifier("FiveSecond", notificationContent, trigger);
center.AddNotificationRequest(request,(NSError obj) =>
{
});
}
当调用该方法时，例如：
RegisterNotification(20);//set the time you want to push notification
即使您关闭应用程序，通知也会在 20 秒后推送。
我已经将我的demo上传到我的github上，你可以下载参考：演示链接 https://github.com/MonkeyLucas/workplat/tree/master/workplat .
您可以访问链接以获取更多信息和详细信息：微软文档 https://learn.microsoft.com/en-us/xamarin/ios/platform/user-notifications/enhanced-user-notifications?tabs=vsmac
