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POIf two local notifications have the same fire time and the app is in the background then didReceiveLocalNotification is only called once
 

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  1. POIf two local notifications have the same fire time and the app is in the background then didReceiveLocalNotification is only called once
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    <p>This is easy to reproduce - and looks like a bug with iOS? If its a feature, then how to tell if the 2nd notification has been accepted or not?</p> <hr> <p>UPDATE: This isn't limited in scope to two or more notifications with the same fire date, they can have any fire date but if they both expire while the app is in the background then its still the same result - didReceiveLocalNotification is only called once.</p> <hr> <p>If two local notifications are scheduled with the same fire date and the app is in the background (applicationDidEnterBackground: was the last method to be called) then this is the sequence of steps that occurs when the notifications fire:</p> <p>1) The two notifications are displayed to the user</p> <p>2) The user clicks on first notification</p> <p>3) applicationWillEnterForeground: is called as a consequence of step 2</p> <p>4) didReceiveLocalNotification: is called</p> <p>5) applicationDidBecomeActive: is NOT called, nothing happens further until step 6</p> <p>6) The user clicks on the second notification</p> <p>7) Now applicationDidBecomeActive is called as a consequence of step 6 </p> <p>8) didReceiveLocalNotification is NOT called a 2nd time after step 6</p> <p>The consequence of this is the app does NOT receive any indication that more than one local notification was accepted by the user.</p> <p>This is easy to reproduce - create a new project, add the following code, run then exit the app before the notifications have triggered.</p> <p>-</p> <pre><code> (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"didFinishLaunchingWithOptions"); self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil]; self.window.rootViewController = self.viewController; [self.window makeKeyAndVisible]; NSDate* date = [[NSDate alloc] initWithTimeIntervalSinceNow:20]; UILocalNotification *notif1 = [[UILocalNotification alloc] init]; notif1.fireDate = date; notif1.timeZone = [NSTimeZone defaultTimeZone]; notif1.alertBody = @"Notif1"; UILocalNotification *notif2 = [[UILocalNotification alloc] init]; notif2.fireDate = date; notif2.timeZone = [NSTimeZone defaultTimeZone]; notif2.alertBody = @"Notif2"; [[UIApplication sharedApplication] scheduleLocalNotification:notif1]; [[UIApplication sharedApplication] scheduleLocalNotification:notif2]; NSLog(@"Notifications scheduled"); return YES; } - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification { NSLog(@"didReceiveLocalNotification: %@", notification.alertBody); } </code></pre> <p>This is the console output:</p> <p>2012-02-01 21:32:12.832 NotificationsTest[13223:f803] didFinishLaunchingWithOptions 2012-02-01 21:32:15.755 NotificationsTest[13223:f803] Notifications scheduled 2012-02-01 21:32:15.756 NotificationsTest[13223:f803] applicationDidBecomeActive: 2012-02-01 21:32:22.838 NotificationsTest[13223:f803] applicationWillResignActive: 2012-02-01 21:32:22.840 NotificationsTest[13223:f803] applicationDidEnterBackground:</p> <p>[the two notifications are displayed, with Notif2 on top of Notif1]</p> <p>[User views Notif2]</p> <p>2012-02-01 21:33:34.177 NotificationsTest[13223:f803] applicationWillEnterForeground: 2012-02-01 21:33:34.179 NotificationsTest[13223:f803] didReceiveLocalNotification: Notif2</p> <p>[User views Notif1]</p> <p>2012-02-01 21:33:58.278 NotificationsTest[13223:f803] applicationDidBecomeActive:</p> <p>How can the app get information that the 2nd notification has expired and its contents?</p>
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    1. USGruntcakes
    1. USGruntcakes
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      1. POIf two local notifications have the same fire time and the app is in the background then didReceiveLocalNotification is only called once
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    1. COYour last 3-4 questions seem to be subtle variations of this same question. Would it not be possible to combine them into a single question? It's likely to have the same answer.
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      1. POIf two local notifications have the same fire time and the app is in the background then didReceiveLocalNotification is only called once
      1. USCody Gray
    2. COI think they are different, I have different issues depending upon if the app is in the foreground or background. I think the foreground issue from my other question may be my problem but don't know where yet. However the specific issue that this question is addressing can be repeated with just the few lines of code I have posted above and thus is an issue unrelated to my app. The code posted above is stand alone - I created a new project to reproduce this issue to see if it was something I had done or the OS, I think this code shows this issue is how the OS is behaving.
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      1. POIf two local notifications have the same fire time and the app is in the background then didReceiveLocalNotification is only called once
      1. USGruntcakes
    3. CODid you ever come to a solution for this? I'm experiencing the same and I've looked at it from every angle and yes, it appears you only get one notification regardless of how many fired. And now I'm left with figuring out how to best handle it given that it seems that's just the way it is.
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      1. USRunningPink
 

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