DidReceiveNotificationRequest 没有被调用

问题描述：

我有一个 xamarin 表单应用程序，当我从服务器收到通知时，没有调用 ios 通知服务扩展.

I have a xamarin forms application and ios Notification service extension is not getting called when I receive notification from server.

到目前为止，我做了以下几件事:

I have done the following things so far:

在 apns 负载中添加了 mutable-content = 1.

这就是我在服务中操作 apns 负载的方式

This is how I manipulate the apns payload in the service

    public class NotificationService : UNNotificationServiceExtension
    {
        Action<UNNotificationContent> ContentHandler { get; set; }
        UNMutableNotificationContent BestAttemptContent { get; set; }

        protected NotificationService(IntPtr handle) : base(handle)
        {

        }

        public override void DidReceiveNotificationRequest(UNNotificationRequest request, Action<UNNotificationContent> contentHandler)
        {
            ContentHandler = contentHandler;
            BestAttemptContent = (UNMutableNotificationContent)request.Content.MutableCopy();

            var newAlertContent = new UNMutableNotificationContent
            {
                Body = "Body from Service",
                Title = "Title from Service",
                Sound = BestAttemptContent.Sound,
                Badge = 2
            };
            ContentHandler(newAlertContent);
        }

        public override void TimeWillExpire()
        {
        }
    }

我还完成了通知服务扩展包 ID.(我的应用包 ID 是 com.companyname.appname.test，扩展包 ID 是 com.companyname.appname.test.xxxxServiceExtension

在 Finishlaunching 方法的 AppDelegate 类中，我还添加了权限代码.

In the AppDelegate class in Finishlaunching method I also have the permission code added.

  UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert, (approved, err) => {
            });

还有什么我需要做的吗?

Is there anything else that I need to do?

答

只有当远程通知的有效负载包含以下信息时，系统才会执行您的通知内容应用扩展:

The system executes your notification content app extension only when a remote notification’s payload contains the following information:

有效负载必须包含值为 1 的可变内容键.

The payload must include the mutable-content key with a value of 1.

负载必须包含带有标题、副标题或正文信息的警报字典.

The payload must include an alert dictionary with title, subtitle, or body information.

清单 2 显示了包含加密数据的通知负载的 JSON 数据.设置可变内容标志以便用户的设备知道运行相应的服务应用扩展，其代码显示在 .

Listing 2 shows the JSON data for a notification payload containing encrypted data. The mutable-content flag is set so that the user’s device knows to run the corresponding service app extension, the code for which is shown in .

清单 2指定远程通知负载

Listing 2 Specifying the remote notification payload

{
   "aps" : {
      "category" : "SECRET",
      "mutable-content" : 1,
      "alert" : {
         "title" : "Secret Message!",
         "body"  : "(Encrypted)"
     },
   },
   "ENCRYPTED_DATA" : "Salted__·öîQÊ$UDì_¶Ù∞è   Ω^¬%gq∞NÿÒQùw"
}

您确定指定了警报键吗?

Are you sure that you specify alert key?

DidReceiveNotificationRequest 没有被调用

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