在后台运行时如何与父应用程序通信？

Question

我正在尝试使用Xamarin开发watchOS 3。我的手表处于活动状态时正在与父应用程序通信。当iOS应用被杀死或处于后台状态时，我的手表没有收到任何更新的数据。我每10秒从手表发送一次请求，以获取更新的数据。我正在使用WCSession进行连接。问题是：可以从watch extension激活父应用程序吗？ 我的连接功能：

 public void StartSession()
    {
        if (session != null)
        {
            session.Delegate = this;
            session.ActivateSession();
            Console.WriteLine($"Started Watch Connectivity Session on {Device}");
        }
    }
public override void SessionReachabilityDidChange(WCSession session)
    {
        Console.WriteLine($"Watch connectivity Reachable:{(session.Reachable ? '✓' : '✗')} from {Device}");
        // handle session reachability change
        if (session.Reachable)
        {
            // great! continue on with Interactive Messaging
        }
        else {
            //  prompt the user to unlock their iOS device
        }
    }

    #region Application Context Methods

    public void UpdateApplicationContext(Dictionary<string, object> applicationContext)
    {
        // Application context doesnt need the watch to be reachable, it will be received when opened
        if (validSession != null)
        {
            try
            {
                var NSValues = applicationContext.Values.Select(x => new NSString(JsonConvert.SerializeObject(x))).ToArray();
                var NSKeys = applicationContext.Keys.Select(x => new NSString(x)).ToArray();
                var NSApplicationContext = NSDictionary<NSString, NSObject>.FromObjectsAndKeys(NSValues, NSKeys);
                NSError error;
                var sendSuccessfully = validSession.UpdateApplicationContext(NSApplicationContext, out error);
                if (sendSuccessfully)
                {
                    Console.WriteLine($"Sent App Context from {Device} \nPayLoad: {NSApplicationContext.ToString()} \n");
                }
                else
                {
                    Console.WriteLine($"Error Updating Application Context: {error.LocalizedDescription}");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Exception Updating Application Context: {ex.Message}");
            }
        }
    }

    public override void DidReceiveApplicationContext(WCSession session, NSDictionary<NSString, NSObject> applicationContext)
    {
        Console.WriteLine($"Receiving Message on {Device}");
        if (ApplicationContextUpdated != null)
        {
            var keys = applicationContext.Keys.Select(k => k.ToString()).ToArray();
            var values = applicationContext.Values.Select(v => JsonConvert.DeserializeObject(v.ToString())).ToArray();
            var dictionary = keys.Zip(values, (k, v) => new { Key = k, Value = v })
                                 .ToDictionary(x => x.Key, x => x.Value);

            ApplicationContextUpdated(session, dictionary);
        }
    }

    #endregion