I have an app that needs to send a reminder notification everyday at a user specified time. For now, I have used flutter_local_notification and used the zoneSchedule method to send a notification locally for that particular day after fetching the time from firebase.
My question is how should I make it so that this notification is sent everyday? When should the scheduling happen.
The specified time can be changed by the user.
I'd like the notification to be sent even when there is no internet connection.
If the app is not in the foreground the app is suspended, so your code wont execute.
You can wake up the app via a push notification from an external source but this will not work if the app has no internet connection.
If you want to execute it without an internet connection, you have to register a background task.
See:
https://docs.flutter.dev/development/packages-and-plugins/background-processes
https://pub.dev/packages/workmanager
Related
I'm looking for a way to send notifications to the user every time my database, in this case Firestore, is changed, even when the application is closed. Any ideas on how I can do that? My application is a messaging app, so I need my user to receive a notification every time a new message arrives, even if the application is closed.
At the moment I just configured local notifications and looked for solutions on YouTube, but I didn't find anything.
I am trying to have my app execute functions in the background on a regular basis. As performFetchWithCompletionHandler is too unpredictable I read about APNs.
Can I use APNs to periodically send a silent push notification to the device that would make the app execute my data fetching and analyzing functions then displaying a notification to the user accordingly?
Is it possible to have the server send the "wakeup signal" only and have the app display the notification by itself because of this?
I might have misunderstood the APNs logic entirely.
I have created a local notification which will fire a notification three times a day.
In afternoon user mobile was dead ,now he will not be able to see his afternoon notification.
By which method i can know that which notification was not delivered and delivering it when user iPhone become on.
I am new to iphone. I am doing Project in that i have struck in the middle because of local notifications concept.In my applications i am sending the request to the server and getting response for every 20 sec by using timer concept but when the application enter the background
how can we get the response from the server for every 20 sec by using local notifications.If anybody knows this concept please help me...
When App on background mode , you receive loacl notification, and you click yes button then
- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif
this function is call and you get dictionary
NSLog(#"%#",[notif userInfo]);
and call the xml in this function.. and you can get resonance from your server very easily
Generally, your app doesn't get to execute in the background, and local notifications won't provide you the ability to execute in the background.
(There are exceptions to this, but they come with limitations. If you really need to ping a server every 20 sec because you're something like a VoIP app, you can declare that you're a VoIP app and set up a keep-alive handler for doing that ping. However, if you're submitting to the App Store, Apple will require that you're really implementing a VoIP-like app, and not just downloading new RSS feeds in the background or some such.)
What local notifications are for is getting the user's attention when your app isn't active. While your app is running, you can schedule a local notification to post a message to the user some time later (sort of like a calendar alarm). If you're using one of the supported background execution modes, you can use a local notification to get the user's attention right now. Either way, your app only gets activated if the user chooses to tap the notification.
I have implemented all recommended methods in AppDelegate to get working Remote Notifications service.
I can accept them while running, while launching and while turned off.
But there is an issue, since I can't work with many received notifications while in background. I can work only with latest notification.
What is recommended manual to do that? How can I got all notifications received while in background? Is it only solvable via manual call to my service provider (sender of apns data)?
With all the projects I've worked on there hasn't been a way to locally store this information if the push notification is dismissed. In all those cases we used a small file on the server that the app would connect to and pull when it became active again. There was also some place in the app where the user could see all their notifications which, again, were stored on the server for quick retrieval.
With the way I understand push notifications to be setup, if the notification is dismissed the system discards it. It'll perform anything it's supposed to do (such as update the badge number and play the correct sound) but any additional information specific to that notification is lost.
Not sure if this helps, but if you just want to know how many notifications you have missed while you were in background. You can create a variable which contains notification number and store this in the app every time you handle notification. When you come out of background and receive a new notification you can subtract the new number with the stored number to find out the number of missed notifications. I don't think there is a way where iOS can give you complete data associated with all the notification device have received while the app was in background.
The best solution is to keep a list of sent notifications with all relevant data on your server, so the app can access that data when it launches. Sending multiple notifications with data that is not stored on the server can be risky, because the application only receives the notification when the user opens the app from that notification, so if they tap on one notification, the app will only every receive that one.
If you have them all in a list on your server, the app can simply go and pull that list down, and process it, making sure no data is lost.