Short snipped with an explanation of how your app needs to respond to local notifications.

LocalNotifications.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    UILocalNotification *localNotification = launchOptions[UIApplicationLaunchOptionsLocalNotificationKey];
    if (localNotification) {
        // the user opened your app by tapping either the notification banner, the notification
        // center entry or the open action in the alert view of the notification while your app
        // was not running / suspended.
        // This is where you want to react to the user's action!
    }
}

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
    if (application.applicationState == UIApplicationStateActive) {
        // the notification was triggered right now and the user is currently in your app
        // the user has not yet seen your notification as it is not shown by iOS if your app
        // is actively running. Decide whether you want to show it yourself or if you simply
        // want to ignore it.
    } else {
        // the user opened your app by tapping either the notification banner, the notification
        // center entry or the open action in the alert view of the notification while your app
        // was in the background.
        // This is where you want to react to the user's action!
    }
}