Is there anybody knows that if I received a push notification when my app is fully closed, but then I go back to open the app how can I detect this received notification and make certain changes pertain to this notification?
Thanks very much in advance.
I found out a way:
Just detect the Badge numbers, and set it as a user default in app delegate.
In other view controllers, you can perform stuffs depends on the badge numbers, which you can track from NSUserDefault.
Related
If I were to make a messaging app which would involve a user recieving a notification after being messaged by another user, how could i go about setting up the notifications in such a way where they are sent after the message is sent by the user who sent it. If someone could point me in the right direction that would be awesome thank you.
P.S. I am using cloud messaging
At work I have to modify an existing Application to differentiate incoming push notifications by the language of the news.
In Android I found a way to not send the push notification. So I could easily check for the language and only send the right one.
In iOS it seems a little different. (I'm not the Author of the existing code, so maybe I have overlooked something.)
But I can't find any function where I could intercept the incoming message.
I tried functions like UNUserNotificationCenter.Current.RemoveAllPendingNotificationRequests();
and
UIApplication.SharedApplication.CancelAllLocalNotifications();
But without any success... maybe I put them into the wrong place.
Thanks for hints and help
If I understand your question, the answer is it depends.
If you cannot change the push notification on the server, then no. The system will display it as soon as it arrives as it is formatted as the notification that needs to be displayed.
However, you can change the format of notification payload so that it doesn't display but it is rather processed by the application. Then you can process it in the app similar to what you do on Android.
I don't want to change the notification. I just don't want to show
it...
I don't think it is possible to choose which notification to show when your app is not running.
If your app isn't running then the notification is processed by iOS and your app doesn't get called.
You can have a look at answer in this thread.
Refer: https://learn.microsoft.com/en-us/xamarin/ios/platform/user-notifications/
In doing some testing on the iOS 11 preview, I've noticed that when I get push notifications while my app is foregrounded the OS displays the system notification that you normally only see when your app is not active.
I didn't see anything announced as having been changed, or any new APIs to change this behavior one way or another. Does anyone know or have links to documentation stating if this is intended, a bug, temporary, or what?
There's an option for showing Push Notifications in the foreground in UserNotification framework.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
willPresentNotification:(UNNotification *)notification
withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler
Quoting the comment from the Framework:
The method will be called on the delegate only if the application is in the foreground. If the method is not implemented or the handler is not called in a timely manner then the notification will not be presented. The application can choose to have the notification presented as a sound, badge, alert and/or in the notification list. This decision should be based on whether the information in the notification is otherwise visible to the user.
This could be the place to start looking for the answer.
I know there are a lot of questions related to this subject, but after searching I found out that they all say that if the app is closed then the only way is to fetch the notification again from the server once the app is opened or if the app is opened from the notification then you can handle it in didFinishWithLaunch but using WhatsApp, this is not the case...
I tried sending a message to phone B (which had whatsapp closed), Phone B received the notification. Then I turned off the internet on Phone B and opened the app and still received the chat message.
Can anyone guide me on how to do this?
Probably you should use one of background modes - "remote-notification".
After enabling it, you can send push with payload like
{
"alert": "",
"badge": "0",
"content-available": 1,
"sound": ""
}
if you specify content-available key equal 1, iOS will wake your app and call application:didReceiveRemoteNotification:fetchCompletionHandler: in app delegate and you have some time to proceed push and prepare app (like download this new message to device). Here is Apple docs link with info about push payloads.
However please be aware that this push delivering is not guaranteed. Apple tells
(Newsstand apps are guaranteed to be able to receive at least one push with this key per 24-hour window.)
In our experience you likely receive it most of the time, but not always. For example app delegate callback will not be called if user swiped to close your app.
Also you need to finish execution in 30 seconds or less and call the block in handler parameter (you can check discussion section of method documentation for more details)
I am creating a Mac OS X application to use Notification Center. Some notifications should remain on the screen until the user interacts with them, and others should disappear shortly after displaying.
The NSUserNotificationAlertStyle key and changing System Preferences allow changing between banners and alerts. However, both approaches change all the notifications sent from my application.
Can I send some notifications as alerts and others as banners? If so, how?
NSUSerNotificationAlertStyle is the only way the developer can set the default notification style for the application, and it sets the style for all notifications from that app.
If you think it's really important for you to have 2 different kinds of notifications you can work around the problem by having a hidden helper application with a different NSUserNotificationAlertStyle than the main app.
Remember though you set the default notification style, but the user can change it whenever he wants in the notification center prefs, making your helper app useless.
No. The different notification types exist so that the user may select what he/she prefers, not so that the developer can.
If you feel your app should have this ability, you should file an enhancement request at http://bugreporter.apple.com and let Apple know.