I try to show toasts(banners) notification - while application in the background.
I checked background fetch and push notification. I also received push notification when app in foreground.
But when my app in background - I only see how change my badges count - but i don't see notification
This is my code:
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
global::Xamarin.Forms.Forms.Init ();
LoadApplication (new App ());
if (UIDevice.CurrentDevice.CheckSystemVersion (8, 0)) {
var pushSettings = UIUserNotificationSettings.GetSettingsForTypes (
UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound,
new NSSet ());
UIApplication.SharedApplication.RegisterUserNotificationSettings (pushSettings);
UIApplication.SharedApplication.RegisterForRemoteNotifications ();
} else {
UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound;
UIApplication.SharedApplication.RegisterForRemoteNotificationTypes (notificationTypes);
}
return base.FinishedLaunching (app, options);
}
and
public override void ReceivedRemoteNotification(UIApplication application, NSDictionary userInfo)
{
NSDictionary dic = userInfo.ObjectForKey(new NSString("aps")) as NSDictionary;
var test = (dic[new NSString("test")] as NSString).ToString();
var alert = new UIAlertView ("Test title", "This is message", null, "Ok", "Button");
alert.Clicked += (object sender, UIButtonEventArgs e) => {Console.WriteLine(e.ButtonIndex);};
alert.Show ();
}
So how i say - in foreground all works great but in background I only see the new count of badges.
I also find this plugin:
https://components.xamarin.com/view/alert-center
But I want to understand how to write it without plugin.
Thank you.
Ok - I solved it !
For developers who will take same problem:
I just don't send ALERT object in aps json to ios.
Related
Remote Notifications are not displaying on the device.
We are using iOS 11.2 and Twilio.
We have generated the APN in Apple Developer Portal and exported the
certificate and key into Twilio.
Twilio says the message is "sent," but it never displays on the
device.
The goal is to send a message with a simple header and body text, and have that display as a remote push notification on the device.
The Xamarin documentation seems incomplete, and I cannot find clear instructions on how to handle displaying the notification. I have looked at the Xamarin samples, but they mostly cover local notifications.
Questions are below in the comments. What is missing?
using Foundation;
using UserNotifications;
using UIKit;
namespace MyNotifications.iOS
{
[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
protected UIWindow window;
protected string deviceToken = string.Empty;
public string DeviceToken { get { return deviceToken; } }
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
global::Xamarin.Forms.Forms.Init();
LoadApplication(new App());
// check for a notification while running
if (options != null)
{
if (options.ContainsKey(UIApplication.LaunchOptionsRemoteNotificationKey))
{
NSDictionary remoteNotification = options[UIApplication.LaunchOptionsRemoteNotificationKey] as NSDictionary;
if (remoteNotification != null)
{
//1) is this necessary to handle??? if so, how to display? what are the properties from the remoteNotification object that contain the text?
}
}
}
//this prompts for permissions, which are set
if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
var notificationSettings = UIUserNotificationSettings.GetSettingsForTypes(
UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound, null
);
app.RegisterUserNotificationSettings(notificationSettings);
app.RegisterForRemoteNotifications();
}
else
{
UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge;
UIApplication.SharedApplication.RegisterForRemoteNotificationTypes(notificationTypes);
}
UNUserNotificationCenter.Current.GetNotificationSettings((settings) =>
{
var alertsAllowed = (settings.AlertSetting == UNNotificationSetting.Enabled);
});
// Request notification permissions from the user
UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert, (approved, err) =>
{
// 2) how do we handle this??? what comes next?
});
return base.FinishedLaunching(app, options);
}
// 3) does this override need to do anything???
public override void ReceivedRemoteNotification(UIApplication application, NSDictionary userInfo)
{
// 4) should all of these trigger a notification? does that have to happen manually?
if (application.ApplicationState == UIApplicationState.Active)
{
ProcessPushNotification(userInfo, true);
}
else if (application.ApplicationState == UIApplicationState.Background)
{
ProcessPushNotification(userInfo, true);
}
else if (application.ApplicationState == UIApplicationState.Inactive)
{
ProcessPushNotification(userInfo, true);
}
}
protected void ProcessPushNotification(NSDictionary userInfo, bool isAppAlreadyRunning)
{
if (userInfo == null) return;
if (isAppAlreadyRunning)
{
// 5) do we need to generate our own view???
}
else
{
// 6) how to handle in the background???
}
}
// APNS background
public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
deviceToken = deviceToken.ToString();
}
// Handle errors and offline
public override void FailedToRegisterForRemoteNotifications(UIApplication application, NSError error)
{
// 7) what to do here???
}
}
}
Microsoft Docs has a few guides on how to deal with push notifications on both platforms, iOS and Android. Most of them are sending notifications from an Azure Notifications Hub but in this case, it shouldn't make any difference, because your question is about displaying push notifications, and not sending them.
The guide on how to send and receive notifications in a Xamarin.Forms app gives you an idea of the complete end-to-end setup. There are also two slightly different guides with a focus on Azure here and here
And for rendering messages on iOS, if the app is backgrounded, the notification is rendered by iOS without any custom code so if the app is properly configured and signed, you should be able to see a push notifications without any additional client-side code, just make sure you test on a device (sims doesn't support pushes) and valid profile with pushes enabled.
I am using Xamarin.forms and implemented Local push notification for iOS. It is working successfully when I am debugging the app through visual studio even when the app is minimized, the app can able to receive the notification. But while running the app directly without debugging through visual studio, the app is not able to display the notification. Kindly guide me on this.
Then I also tried by releasing the app to the app store but experienced the same, the app is not able to receive the notification it not even in foreground mode.
I already have selected the "Background fetch" property under Background Modes in Info.plist.
I have also added below the line in my FinishedLaunching method
UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval(UIApplication.BackgroundFetchIntervalMinimum);
Entire Implementation of code is as below
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
try
{
UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval(UIApplication.BackgroundFetchIntervalMinimum);
try
{
if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert |
UNAuthorizationOptions.Sound |
UNAuthorizationOptions.Sound,
(granted, error) =>
{
if (granted)
{
InvokeOnMainThread(UIApplication.SharedApplication.RegisterForRemoteNotifications);
}
});
}
else if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
var pushSettings = UIUserNotificationSettings.GetSettingsForTypes(
UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound,
new NSSet());
UIApplication.SharedApplication.RegisterUserNotificationSettings(pushSettings);
UIApplication.SharedApplication.RegisterForRemoteNotifications();
}
else
{
UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound;
UIApplication.SharedApplication.RegisterForRemoteNotificationTypes(notificationTypes);
}
bool IsRegistered = UIApplication.SharedApplication.IsRegisteredForRemoteNotifications;
}
catch (Exception ex)
{
UIAlertView avAlert = new UIAlertView("FinishedLaunching Push Notification Exception", ex.Message, null, "OK", null);
avAlert.Show();
}
UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
LoadApplication(new MessengerClient.App());
}
catch (Exception ex)
{
NativeHelper.SendUnhandledException(ex, NativeHelper.iOS + ": FinishedLaunching");
}
return base.FinishedLaunching(app, options);
}
public override void ReceivedLocalNotification(UIApplication application, UILocalNotification notification)
{
/// reset our badge
UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
/// Cancel/clear all Local notifications fronm the tray.
UIApplication.SharedApplication.CancelLocalNotification(notification);
/// Cancel/clear all notifications fronm the tray.
UIApplication.SharedApplication.CancelAllLocalNotifications();
}
code for displaying the notification is as below.
UILocalNotification notification = new UILocalNotification();
notification.FireDate = NSDate.FromTimeIntervalSinceNow(1);
notification.AlertAction = title;
notification.AlertBody = content;
notification.AlertTitle = title;
notification.SoundName = UILocalNotification.DefaultSoundName;
notification.ApplicationIconBadgeNumber = 1;
UIApplication.SharedApplication.ScheduleLocalNotification(notification);
I know this is the repeat question but, I tried all the workaround but didn't work for me.
You can have a check with this Notifications in Xamarin.iOS .
iOS applications handle remote and local notifications in almost exactly the same fashion. When an application is running, the ReceivedLocalNotification method or the ReceivedRemoteNotification method on the AppDelegate class will be called, and the notification information will be passed as a parameter.
An application can handle a notification in different ways. For instance, the application might just display an alert to remind users about some event. Or the notification might be used to display an alert to the user that a process has finished, such as synching files to a server.
The following code shows how to handle a local notification and display an alert and reset the badge number to zero:
public override void ReceivedLocalNotification(UIApplication application, UILocalNotification notification)
{
// show an alert
UIAlertController okayAlertController = UIAlertController.Create(notification.AlertAction, notification.AlertBody, UIAlertControllerStyle.Alert);
okayAlertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
Window.RootViewController.PresentViewController(okayAlertController, true, null);
// reset our badge
UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
}
In addition , there is a sample you can download to check . It works no matter in Debug or Release Model in my local site (iOS 13.3).
The effect :
Just add this code in your AppDelegate DidFinishLaunching and notification will start working in the background. BackgroundTask- showNotification may get canceled sometime, for me whenever my dashboard is loaded, I guess as it has multiple API Calls. so add it in your DidEnterBackground Delegate as well with different taskID, to start a new background task. It works fine for me.
nint taskID = yourTaskID;
taskID = application.BeginBackgroundTask("showNotification", expirationHandler: ()=> {
UIApplication.SharedApplication.EndBackgroundTask(taskID);
});
I have a Xamarin.Forms application for iOS, Android, and now hopefully Mac. I made all the adjustments for the UI to look great on Mac. Submitted it for approval where it was rejected because the user can close the window while the app and menu bar is still running. So I figure I would just add a confirmation pop-up asking if they want to exit the app when they try to close the window.
OK = Terminate the App.
Cancel = Keep the window open.
I find lots of articles on how to handle this with a Xamarin.Mac app, but nothing on how to handle Xamarin.Forms on Mac. The FormsApplicationDelegate does not give access to the View Controller or the Window Delegate in order to override the WindowShouldClose method. I found that I can use NSAlert to do the pop-up which works great. Now I cannot find anything on what to do when the user responds. Open to suggestions.
private void Window_WillClose(object sender, System.EventArgs e)
{
NSNotification senderNotification = ((NSNotification)sender);
NSWindow closingWindow = (NSWindow)senderNotification.Object;
var confirmation = new NSAlert()
{
AlertStyle = NSAlertStyle.Warning,
InformativeText = "Are you sure you want to exit the App?",
MessageText = "Exit?"
};
confirmation.AddButton("OK");
confirmation.AddButton("Cancel");
var result = confirmation.RunModal();
if (result == 1001)
{
//Cancel closing the window
}
else
{
//terminate the app
}
}
After a lot of experimenting, I did find a solution. Here is what officially passed Apple's review. It requires that n menu action is linked as "New Window". It keeps tracks of the open windows and when there is only one left, it prompts to close the app. If the user closes all the windows and keeps the app running, they have the option to open a new window in the menu.
[Register("AppDelegate")]
public class AppDelegate : FormsApplicationDelegate
{
public NSWindow window;
private bool closeApp;
private List<NSWindow> openWindows;
public override NSWindow MainWindow
{
get { return window; }
}
public AppDelegate()
{
this.closeApp = false;
this.openWindows = new List<NSWindow>();
createNewWindow();
}
[Action("newWindow:")]
public void newWindow(NSObject sender)
{
createNewWindow();
this.window.MakeKeyAndOrderFront(sender);
LoadApplication(new App());
base.DidFinishLaunching(null);
}
private void createNewWindow()
{
var style = NSWindowStyle.Closable | NSWindowStyle.Resizable | NSWindowStyle.Titled;
var rect = new CoreGraphics.CGRect(200, 1000, 1024, 768);
window = new MainWindow(rect, style, NSBackingStore.Buffered, false);
window.Title = "MyApp"; // choose your own Title here
window.TitleVisibility = NSWindowTitleVisibility.Hidden;
window.WillClose += Window_WillClose;
openWindows.Add(window);
}
private void Window_WillClose(object sender, System.EventArgs e)
{
openWindows.Remove((NSWindow)((NSNotification)sender).Object);
if (openWindows.Count == 0)
{
var confirmation = new NSAlert()
{
AlertStyle = NSAlertStyle.Warning,
InformativeText = "Do you want to exit the app?",
MessageText = "Exit?"
};
confirmation.AddButton("Yes");
confirmation.AddButton("No");
var result = confirmation.RunModal();
if (result == 1001)
{
this.closeApp = false;
}
else
{
//terminate the app
this.closeApp = true;
}
}
}
public override bool ApplicationShouldTerminateAfterLastWindowClosed(NSApplication sender)
{
return closeApp;
}
public override void DidFinishLaunching(NSNotification notification)
{
Forms.Init();
LoadApplication(new App());
base.DidFinishLaunching(notification);
}
}
I just downloaded an application (not mine) for my studies and noticed that the first time it's opened that a message saying it would like to send me notifications appears. Can anyone explain how to code this to happen with a Forms application? Below is a screen print to show what I mean.
#Timo's answer isn't wrong but few subtle thing are there which should be noticed.
public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
{
//Register your app for remote notifications.
if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
//iOS 10 or later
var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
UNUserNotificationCenter.Current.RequestAuthorization(authOptions, (granted, error) => {
Console.WriteLine(granted);
});
//For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.Current.Delegate = this;
//Messaging.SharedInstance.Delegate = this; //FCM
}
else
{
//iOS 9 or before
var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
var settings = UIUserNotificationSettings.GetSettingsForTypes(allNotificationTypes, null);
UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
}
UIApplication.SharedApplication.RegisterForRemoteNotifications();
//App.Configure(); If using firebase
return true;
}
On iOS, you need to use the UNUserNotificationCenter to request the authorization by modifying the AppDelegate class:
public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
{
// Ask for the permission to send notifications
UNUserNotificationCenter.Current.RequestAuthorization (UNAuthorizationOptions.Alert, (approved, err) => {
// User approved
});
return true;
}
On Android, you don't have to ask for push notification permission separately and no changes are required in your code as long as you have the INTERNET permission set up.
I have an Xamarin.Forms app where I want to use push notifications. I used azure push notification hub from mobile service to push the message. I want to create an interactive banner with some action "Action1" and "Action2" on iOS. I am able to receive the push message with "Action1" and "Action2" button. But tapping on that button does not do any thing. following is my code:
private static void RegisterPushAction()
{
UIMutableUserNotificationAction acceptAction = new UIMutableUserNotificationAction ();
acceptAction.Title = "Action1";
acceptAction.Identifier = "ACCEPT_IDENTIFIER";
acceptAction.ActivationMode = UIUserNotificationActivationMode.Background;
acceptAction.Destructive = false;
acceptAction.AuthenticationRequired = false;
UIMutableUserNotificationAction denyAction = new UIMutableUserNotificationAction ();
denyAction.Title = "Action2;
denyAction.Identifier = "DENY_IDENTIFIER";
denyAction.ActivationMode = UIUserNotificationActivationMode.Background;
denyAction.Destructive = false;
denyAction.AuthenticationRequired = false;
UIMutableUserNotificationCategory acceptCategory = new UIMutableUserNotificationCategory ();
acceptCategory.Identifier = "JOIN_CATEGORY";
acceptCategory.SetActions (new UIUserNotificationAction[]{acceptAction,denyAction}, UIUserNotificationActionContext.Default);
NSSet categories = new NSSet (acceptCategory);
//iOS 7
if (Convert.ToInt16 (UIDevice.CurrentDevice.SystemVersion.Split ('.') [0].ToString ()) < 8) {
UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound;
UIApplication.SharedApplication.RegisterForRemoteNotificationTypes (notificationTypes);
} else {
UIUserNotificationType types = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
UIUserNotificationSettings settings = UIUserNotificationSettings.GetSettingsForTypes (types, categories);
UIApplication.SharedApplication.RegisterUserNotificationSettings (settings);
UIApplication.SharedApplication.RegisterForRemoteNotifications ();
}
}
To handle this I have following method:
public override void HandleAction (UIApplication application, string actionIdentifier, NSDictionary remoteNotificationInfo, Action completionHandler)
{
if (actionIdentifier.Equals ("ACCEPT_IDENTIFIER")) {
//var alert = notification.AlertBody;
//new UIAlertView ("Msg", alert, null, "OK", null).Show ();
//NotificationHelper.ReceivePushMessage (alert);
ProcessNotification (remoteNotificationInfo, false);
}
UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
completionHandler ();
}
The above HandleAction method gets never called and it always calls ReceivedRemoteNotification
public override async void ReceivedRemoteNotification(UIApplication application, NSDictionary userInfo)
{
ProcessNotification (userInfo, false);
}
I have different types of notificatiosn (e.g. a simple banner notification and a banner with Action)
Any thoughts on this?
I do not know if you still have the problem but you should try to write the function HandleAction like this:
public override void HandleAction (UIApplication application, String actionIdentifier, NSDictionary remoteNotificationInfo, NSDictionary responseInfo, Action completionHandler)
Let me know if it worked!