I use Firebase to push notifications to the users at a certain time. They receive the notification but no alert sound is played. In the settings, the allow sound/notifications are turned on and other IOS13 and other apps play sound.
Version Number of FirebasePushNotificationPlugin Plugin: 3.3.10
Device Tested On: iphone X, OS: 13.4.1
Simulator Tested On: N/A (simulators don't receive notifications)
Version of VS: VS for Mac Community, 8.6.6 (build 11)
Version of Xamarin: Xamarin.IOS 13.18.2.1, Xamarin.Forms v4.6.0.847
AppDelegate.cs:
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
bool fbaseStarted = false;
try
{
// This method does all the UNUserNotificationCenter.Current.RequestAuthorization() code so we don't have to.
FirebasePushNotificationManager.Initialize(options, true);
fbaseStarted = true;
}
catch
{ }
LoadApplication(new App());
if (!fbaseStarted)
{
try
{
FirebasePushNotificationManager.Initialize(options, true);
}
catch { }
}
FirebasePushNotificationManager.CurrentNotificationPresentationOption = UNNotificationPresentationOptions.Badge | UNNotificationPresentationOptions.Alert | UNNotificationPresentationOptions.Sound;
}
Within one of the pages of my code, I subscribe a list of tags (please note that I unsubscribe because the first time the code runs it fails silently if the notifications aren't approved - resulting in the model thinking the notifications was subscribed when it wasn't):
CrossFirebasePushNotification.Current.UnsubscribeAll();
CrossFirebasePushNotification.Current.Subscribe(Constants.NotificationTagsArray);
I keep coming across payload json solutions but unless I am wrong, I don't think that applies to me as I am using Xamarin and the FirebasePushNotificationPlugin. Is there any additional permissions that were added in ios 13 for playing notifications with sound that I have missed?
I have also posted here: https://github.com/CrossGeeks/FirebasePushNotificationPlugin/issues/348 but nobody has been able to assist me yet.
Thanks
The issue actually lies with the sending of the notifications nothing to do with the Xamarin App. The issue resided in the services that sends the notifications to firebase (to then be sent out to the phones).
In the service we were sending a FirebaseNet.Messaging.Message() to the phones:
Message FireBasemessage = new Message()
{
To = "/topics/" + PushNote.Tag,
TimeToLive = 86400,
Priority = MessagePriority.high,
ContentAvailable = true,
Notification = new AndroidNotification()
{
Tag = "/topics/" + PushNote.Tag,
Body = enhancedMessage,
Title = xtitle,
}
,
Data = new Dictionary<string, string>
{
{ "param", PushNote.Tag },
{ "text", enhancedMessage}
}
};
In the AndroidNotification() object required Sound = "default" to be added for it to work. Please note that this works for both Android and IOS notifications despite the fact it is an AndroidNotification object.
Related
I'm working on a Xamarion iOS app. I want to display a local notification when an event occurs in my app, Like Outlook does when an email is received.
I'm using the following code, after having received the right to send notification from the user, of course:
var content = new UNMutableNotificationContent();
if (!string.IsNullOrWhiteSpace(value: mySoundFile))
{
content.Sound = UNNotificationSound.GetCriticalSound(mySoundFile);
}
if (!string.IsNullOrEmpty(myChannelDescription))
{
content.ThreadIdentifier = myChannelDescription;
}
content.Title = "MyTitle";
content.Body = "MyText";
var trigger = UNTimeIntervalNotificationTrigger.CreateTrigger(0.1, false);
var request = UNNotificationRequest.FromIdentifier(notification.Id.ToString(), content, trigger);
var center = UNUserNotificationCenter.Current;
center.AddNotificationRequest(request, null);
But the notification is not displayed.
Any help appreciated.
The reason for not displaying the notification could be several things. Try the following solutions:
Make sure that the application has the required rights to send notifications and that the user has enabled them.
Check if the sound file is valid and located in the application package. It may also be necessary to add it to the Info.plist file.
Check if the thread identifier is valid and not repeatable.
Check if the trigger time is valid. Setting 0.1 seconds is very short and may not be enough to display the notification.
If the above solutions do not work, it is worth using debugging tools to more closely examine why the notification is not displayed.
On iOS, you must request permission to use notifications before attempting to schedule them. Just like this, you can try to check if the following code is added to your project:
UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert, (approved, err) =>
{
...
});
You can change your AddNotificationRequest as follows to see if there is an error in the notification：
center.AddNotificationRequest(request, (err) =>
{
if (err != null)
{
throw new Exception($"Failed to schedule notification: {err}");
}
});
For more details, you can refer to the following documents to check some permission issues:
Enhanced User Notifications in Xamarin.iOS | Microsoft
Asking permission to use notifications | Apple Developer
UpDate: If your app is in the foreground. You could try implementing the delegate userNotificationCenter(_:willPresent:withCompletionHandler:) which will be called when a notification arrives while the app is in the foreground. Refer to the following code:
UNUserNotificationCenter.Current.Delegate = new TestDelegate();
public class TestDelegate: UNUserNotificationCenterDelegate
{
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
completionHandler(UNNotificationPresentationOptions.Alert);
}
}
when I'm receiving push notification on iOS 13, and device is locked. I' getting pushnotifcation, but it gets cleared immediately without any user interaction.
I'm using .net and following is payload code which I'm using
{to = notification.DeviceToken,
priority = "high",
content_available = true,
notification = new
{
body = notification.Message, //This will be a subtitle..
title = notification.Name, //This will be a title..
},
data = new
{
notificationId = notification.NotificationId,
userId = notification.UserId,
encryptedNotification = Crypto.Encrypt("id", notification.NotificationId.ToString())
}
};
string postbody = JsonConvert.SerializeObject(payload).ToString();
Byte[] byteArray = Encoding.UTF8.GetBytes(postbody);
tRequest.ContentLength = byteArray.Length;
**tRequest.Headers.Add("apns-push-type", "alert");**
**tRequest.Headers.Add("apns-priority", "5");**
}```
Please guide me what wrong in code.
have referred following azure code to implement, but not able to find the cause.
https://learn.microsoft.com/en-us/azure/notification-hubs/push-notification-updates-ios-13
This can happen if you have a code that decreases the app icon's notification badge number. If you do that, make sure you do it only if the application is active. If it is inactive and you decrease the badge number, it might cause the notification to appear and immediately disappear.
maybe someone can help me.
In my app I'm using push notifications to inform the users that a new message is written to the database. One user can accept the notification and work with the content or dismiss it. If the user accepts it, a silent push is sent to all other devices which received the notification earlier. Here is my code handling this silent notification:
public override void ReceivedRemoteNotification(UIApplication application, NSDictionary remoteNotification)
{
try
{
if (remoteNotification != null)
{
var alert = remoteNotification[FromObject("aps")];
if (alert != null)
{
string id = ((NSDictionary)alert)[FromObject("deleteId")].Description;
if (!String.IsNullOrEmpty(id))
{
List<string> idents = new List<string>();
UNUserNotificationCenter.Current.GetDeliveredNotifications(completionHandler: (UNNotification[] t) =>
{
foreach (UNNotification item in t)
{
UNNotificationRequest curRequest = item.Request;
var notificationId = ((NSDictionary)curRequest.Content.UserInfo[FromObject("aps")])[FromObject("notificationId")].Description;
if (id == notificationId)
{
idents.Add(curRequest.Identifier);
}
}
UNUserNotificationCenter.Current.RemoveDeliveredNotifications(idents.ToArray());
});
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
The problem is that the notification is still visible in the notification center until the app is brought to foreground. But then it gets deleted.
Is there a way to force the method to delete the notification instantly and not only when the app is (re)opened?
When you want to clear the Notifications send from this app. Set its application's badge to 0 to achieve this.
As you said you send a silent notifications to other users, Then DidReceiveRemoteNotification() will fire. In this event we can clear all notifications:
public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
var aps = userInfo["aps"] as NSDictionary;
if (aps["content-available"].ToString() == "1")
{
//check if this is a silent notification.
UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
}
completionHandler(UIBackgroundFetchResult.NewData);
}
Please notice that starting with iOS 8.0, your application needs to register for user notifications to be able to set the application icon badge number. So please add the code below in FinishedLaunching():
UIUserNotificationSettings settings = UIUserNotificationSettings.GetSettingsForTypes(UIUserNotificationType.Badge, null);
UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
Moreover silent notifications can only be received when your app is on background or foreground. If it's terminated, this will fail.
To remove a notification, you send a silent push notification to all devices with the notification ID as payload that should be removed.
On the clients you implement a UNNotificationServiceExtension which allows you to remove currently displayed notifications by their IDs: UNUserNotificationCenter.current().removeDeliveredNotifications.
This gives you the advantage that you have full control over this logic on the server side.
I am building an iOS app with Xamarin, with this BLE plugin:
https://github.com/aritchie/bluetoothle
I'm just broadcasting a UUID via BLE, and it works. Here is my code:
var data = new Plugin.BluetoothLE.Server.AdvertisementData
{
LocalName = "MyServer",
};
data.ServiceUuids.Add(new Guid("MY_UUID_HERE"));
await this.server.Start(data);
The only problem is that it stops broadcasting once I put the app in the background. And resumes again when I open the app again.
How can I let it continue to broadcast once it's in the background? I read the documentation here:
https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothBackgroundProcessingForIOSApps/PerformingTasksWhileYourAppIsInTheBackground.html
And it says that I have to use the CBCentralManager class to obtain the preservation and restoration feature (so I can keep broadcasting the UUID at all times), but I'm having a hard time translating this to Xamarin/C#.
EDIT
After researching some more, I read that I need to create an instance of CBCentralManager and implement WillRestoreState in the delegate. I did this in the AppDelegate:
[Register("AppDelegate")]
public class AppDelegate : MvxApplicationDelegate, ICBCentralManagerDelegate
{
private IGattServer server = CrossBleAdapter.Current.CreateGattServer();
private CBCentralManager cbCentralManager;
public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
{
// irrelevant code...
this.Ble();
return true;
}
private async Task Ble()
{
try
{
await Task.Delay(5000); // wait for it to finish initializing so I can access BLE (it crashes otherwise)
var options = new CBCentralInitOptions();
options.RestoreIdentifier = "myRestoreIndentifier";
this.cbCentralManager = new CBCentralManager(this,null,options);
var data = new Plugin.BluetoothLE.Server.AdvertisementData
{
LocalName = "MyServer",
};
data.ServiceUuids.Add(new Guid("MY_UUID_HERE"));
await this.server.Start(data);
}
catch (Exception e)
{
}
}
public void UpdatedState(CBCentralManager central)
{
//throw new NotImplementedException();
}
[Export("centralManager:willRestoreState:")]
public void WillRestoreState(CBCentralManager central, NSDictionary dict)
{
//never gets called
}
But it didn't make a difference for me. And the WillRestoreState method never gets called... I don't mind using a different plugin/library if I have to at this point...
EDIT 2
I just realized that the app is still broadcasting while it is in the background, I just don't see the service UUID anymore (in the web portal of the beacon that I'm testing with), I only see the phone's identifier.
After doing tons of research, I found that it is simply an iOS restriction - you can not broadcast the UUID of a BLE service while your app is in the background. Background work is very restrictive in iOS.
EDIT to include Paulw11 comment (which is true):
You can advertise a service, but it is advertised in a way that only another iOS device that is specifically scanning for that service UUID can see.
Although you can not broadcast the UUID of a BLE service while your iOS app is in the background, for anyone trying to do something similar, you should look into iBeacon. It's Apple's protocol for letting iOS apps do bluetooth stuff while it's in the background.
I'm developing iOS application in Unity. I need to show Local Push Notifications.
I use the next code:
public class TestNotification : MonoBehaviour {
void Start(){
UnityEngine.iOS.NotificationServices.RegisterForNotifications(UnityEngine.iOS.NotificationType.Alert | UnityEngine.iOS.NotificationType.Badge | UnityEngine.iOS.NotificationType.Sound);
}
public void ShowNotification(){
#if UNITY_IOS
var iOSNotification = new UnityEngine.iOS.LocalNotification();
iOSNotification.alertBody = "Hello!";
UnityEngine.iOS.NotificationServices.PresentLocalNotificationNow(iOSNotification);
#else
Debug.LogError("Platform is not supported.");
#endif
}
}
When I call ShowNotification, notification appears in Notification Panel, but without any sound and popup. How to make my notifications show normally? I accepted all permissions(alert, sound, badge) on launch.
Testing Device: iPhone 4s, iOS 9.3.5
Build: Unity 5.4.4f1, XCode 8.2.1
You need to place this code in order to play sound and display alert
iOSNotification.soundName = LocalNotification.defaultSoundName;
iOSNotification.alertAction = "Alert Action";
iOSNotification.hasAction = true;
If you wan sound, you should specify default sound name.
iOSNotification.soundName = "default";
Add this, and it will play default sound.