I'm learning to develop application for ios with swift, and I'm one doubts, already googled and i not found.
I'm creating a to-do list app, and was wondering if there is a way to reschedule a notification when it appears to the user
For example the user registers a task every two hours, then the notification appears to the user and reagendo the new notification
Can anyone help me?
Thank you
You can't do it in background if your app is suspended. But UILocalNotification supports recurrent notifications.
All you have to do is to declare the recurring interval: notif.repeatInterval = NSDayCalendarUnit;
You can find more details here.
Note that you can't set custom intervals. You must use the default ones provided by Apple.
Related
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.
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.
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.
I have created an app that triggers video at particular time similar to alarm, but the problem I am facing is that when I am out of application & have set the timings the video doesn't show up(i.e. similar to alarm I should get notification out side my app). Please help me out with the same. Would be very grateful for any helpful suggestion.
When an application is not running, you cannot predict what time its background process will execute, so there is no way that you can set an alarm with any degree of precision smaller than perhaps an hour. The only way to have timing close to accurate would be with a push notification from a server. Even then, the notification you receive will not be able to open and play video on its own. You could create a push/toast notification that originates at a server, sends the user a toast, the user taps it, and that opens the app to play the video. You can't do it without user intervention.
See this link for an overview, including the constraints on background agents: http://msdn.microsoft.com/en-us/library/hh202942(v=VS.92).aspx
You cannot open an app and play a video from a background agent. You can show a toast notification that would allow the user to open the app. You can use a Scheduled Agent or PeriodicTask.You can then use the ShellToast to show a toast notification so the user can open the app. Once the app is open you can start the video.