Get push notification data when application is in background IOS - ios

Question

Hi I am developing small IOS application in which I am using push notification. So in my case I am able get notifications and I am also able to access data for notification. Data from notification mean title, description etc. So in my case I am not saving my notification at my server side. I want to save those locally. For that what I want as soon as notification come I want to save that data locally. I am able to access my data when App is in foreground but I am not able to access my notification data when app is in background. I want to access the data of notification so that I can save it. For notification I did following things:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[application registerForRemoteNotificationTypes:
UIRemoteNotificationTypeBadge |
UIRemoteNotificationTypeAlert |
UIRemoteNotificationTypeSound];
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
return YES;
}
- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)newDeviceToken {
}
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
for (NSString *key in [userInfo allKeys])
{
NSString *data = [userInfo objectForKey:key];
NSLog(#"inside did register for notification .... %# ---- > %#",key,data);
}
}
My requirement is simple I want access to notification when my app is in background. Any one is here who already did this? Need Help. Thank you.

Answer 1

In iOS, the app cannot access it's push notification until the user taps on the push notification from the notification center.
Once the push notification is tapped and the app loads/becomes active, only then will you be able to access the push notification.
FYI:
When the app is in background and a push notification is recieved.
After the user taps on the push notification:
the contents will be accessible in the -didReceiveRemoteNotification: method.
When the app is not open and a push notification is received.
After the user taps on the push notification
the contents will be accessible in the -didFinishLaunchingWithOptions: method in it's launchOptions parameter.
Also... push notifications aren't 100% reliable. They may or may not be delivered (although them not being delivered is pretty rare in my observation but worth pointing out none-the-less)

Answer 2

There is a way in iOS 7.0 and later where you can send notifications and access its content without user tapping it.
So, the notification payload which you send has a parameter called content-available. You can view the payload parmeters in the following link:
https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/ApplePushService.html
So when you set the content available to 1 and deliver the notification, iOS calls the below function even if the app is not in the background or foreground(must have remote notification enabled)
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))handler
Then you can use the userInfo dictionary to fetch your notification data.