CODEWITHSUNDEEP
iosbackgroundmultitaskinguilocalnotificationlocalnotification
Jason
Jason

Reputation: 14615

iOS Local Notofications not firing while app is in background

When my iOS app exits, it registers a series of local notifications, which update the badge number at specific times. The local notifications do not bring up a popup, they simply update the badge. On my old iPod touch which does not support multitasking, this works perfectly. However, on my multitasking enabled devices, I am experiencing a very strange bug: when I have "exited" the app (i.e. it is still running in the background, but I am doing something else), the local notifications are not firing. Is there any reason why the local notifications would not fire when the app is in the background?

The code to create the local notifications runs in a loop (I create a bunch of them):

    UILocalNotification *localNotification = [[UILocalNotification alloc] init];
    localNotification.applicationIconBadgeNumber = totalCount; // a number generated earlier in the code
    localNotification.timeZone = [NSTimeZone defaultTimeZone];
    localNotification.fireDate = endDate; // a date generated earlier
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
    [localNotification release];

And also I have created the following function in my app delegate, which tells me how many notifications are set up before the app enters the background:

- (void)applicationDidEnterBackground:(UIApplication *)application {
    NSLog(@"# Notifications: %d", [[[UIApplication sharedApplication] scheduledLocalNotifications] count]);
}

The app constantly tells me that there are 64 notifications (the number that should be set up) when it enters the background.

Upvotes: 0

Views: 2240

Answers (3)

Poonam More
Poonam More

Reputation: 799

Swift Version:

func applicationDidEnterBackground(application: UIApplication) {
       let notification = UILocalNotification()
        notification.alertBody = "App has been entered in background" 
        notification.alertAction = "open" 
        notification.fireDate = NSDate() 
        notification.soundName = UILocalNotificationDefaultSoundName 
        UIApplication.sharedApplication().scheduleLocalNotification(notification)
    }

Upvotes: 0

Barbara R
Barbara R

Reputation: 1057

Check the following from Apple's developers docs: "Each application on a device is limited to 64 scheduled local notifications. The system discards scheduled notifications in excess of this limit, keeping only the 64 notifications that will fire the soonest. Recurring notifications are treated as a single notification."

Could you problem be related to the number of notifications been scheduled?

You can find further information in http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/WhatAreRemoteNotif.html

Upvotes: 1

Robin
Robin

Reputation: 10011

Well @Jason you need to set the alertBody of the local notification atleast to show an alert view, thats all there is to it.

Also if you dont wont to show the view option in the alert box then set the hasAction attribute to NO.

Upvotes: 0

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