c# - 应用程序被杀死时无法接收 APNS

Question

我正在使用 xamarin 开发 iOS 应用程序。现在我遇到了这个问题，我想从服务器向连接的设备发送推送通知。当我的应用程序运行时以及当我的应用程序处于后台时，我可以收到这些通知。现在的问题是，当我的应用程序被杀死时，我能收到通知吗？ (主页按钮向上滑动)？我读到了它，虽然不可靠，但应该是可能的。但是，我该怎么做呢？

我阅读了有关通过启动选项获取通知的信息

public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)

但它始终为 Null 并且无法调试它，因为我正在关闭我的应用程序。关于我做错了什么的想法？

附言我正在使用开发配置文件(也许这就是问题所在？)

编辑 1:额外信息(代码)

    public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
    {
        application.RegisterForRemoteNotificationTypes (UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound);

        if (launchOptions != null)
        {
            // check for a local notification
            if (launchOptions.ContainsKey(UIApplication.LaunchOptionsRemoteNotificationKey))
            {
                var localNotification = launchOptions[UIApplication.LaunchOptionsRemoteNotificationKey];
                if (localNotification != null)
                {

                    new UIAlertView("TESTER", "TESTER3", null, "OK", null).Show();
                    // reset our badge
                    UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
                }
            }
        }
        return true;
    }

    public override void RegisteredForRemoteNotifications (UIApplication application, NSData deviceToken)
    {
        Console.WriteLine (deviceToken.ToString ());
        String tokenStr = deviceToken.Description;
        var deviceToken1 = tokenStr.Replace ("<", "").Replace (">", "").Replace (" ", "");
        ViewController.deviceToken = deviceToken1;
    }

    public override void DidReceiveRemoteNotification (UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
    {
        Console.WriteLine ("Recieved");
        var message = userInfo.ValueForKey (new NSString ("aps")).ValueForKey (new NSString ("message")).ToString ();
        var reload = userInfo.ValueForKey (new NSString ("aps")).ValueForKey (new NSString ("refreshList")).ToString ();
        var vehicleId = userInfo.ValueForKey (new NSString ("aps")).ValueForKey (new NSString ("vehicleListId")).ToString ();
    }

==> 使用 3 个变量(带有信息)做一些事情

Answer 1

首先，可以确保您所有的证书都是正确的(例如:沙箱服务器使用开发证书，生产服务器使用用户生产证书)

其次，您需要用两种不同的方法处理推送通知。我不确定 C# 或 Xamarin 中的代码，Objective-C 中的代码如下:-

//Receive Push Notification when the app is active in foreground or background
- (void)application:(UIApplication *)application 
           didReceiveRemoteNotification:(NSDictionary *)userInfo {

  if(userInfo){
   //TODO: Handle the userInfo here
   }
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //Get the push notification when app is not open
    NSDictionary *remoteNotif = [launchOptions objectForKey: UIApplicationLaunchOptionsRemoteNotificationKey];

    if(remoteNotif){
        [self handleRemoteNotification:application userInfo:remoteNotif];
    }

    return YES;
}

-(void)handleRemoteNotification:(UIApplication*)application userInfo:(NSDictionary*)userInfo{

    if(userInfo){
       //TODO: Handle the userInfo here
    }
}