Xamarin iOS 中的可操作推送通知

Question

        var acceptAction = UNNotificationAction.FromIdentifier("AcceptAction", "Accept", UNNotificationActionOptions.None);
            var declineAction = UNNotificationAction.FromIdentifier("DeclineAction", "Decline", UNNotificationActionOptions.None);

                // Create category
            var meetingInviteCategory = UNNotificationCategory.FromIdentifier("MeetingInvitation",
                new UNNotificationAction[] { acceptAction, declineAction }, new string[] { }, UNNotificationCategoryOptions.CustomDismissAction);

            // Register category
            var categories = new UNNotificationCategory[] { meetingInviteCategory };
            UNUserNotificationCenter.Current.SetNotificationCategories(new NSSet<UNNotificationCategory>(categories));

您如何接收自定义的可操作推送通知以及需要将上述代码放在哪个文件中？

Answer 1

在 iOS 应用程序可以向用户发送通知之前，该应用程序必须在系统中注册，并且由于通知是对用户的干扰，因此应用程序必须在发送之前明确请求许可。

通过将以下代码添加到AppDelegate的FinishedLaunching方法并设置所需的通知类型 (UNAuthorizationOptions)，应在应用启动后立即请求通知权限：

...
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，当应用程序在前台并触发通知时，它可以以不同的方式处理通知。 通过提供 UNUserNotificationCenterDelegate 并实现 UserNotificationCenter 方法，应用程序可以接管显示通知的责任。 例如：

using System;
using ObjCRuntime;
using UserNotifications;


namespace xxx
{
 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();
    }

  }
}