Get push notification data when application is in background 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.

staticVoidMan · Accepted Answer · 2014-05-11 10:02:02Z

2

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)

edited May 11, 2014 at 10:02

answered May 11, 2014 at 9:54

staticVoidMan

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6 Comments

nilkash Over a year ago

Ohhh Is that really true? Dam bad. But why they are not allowing. Is there any other bypass for this ?

staticVoidMan Over a year ago

@nilkash : [1] yes, that's true (afaik) and [2] i think they're not allowed due to, maybe, performance issues because if multiple apps get push notifications and they each do their own thing then the device performance will take a major hit. Also maybe security reasons... who knows. [3] i don't know of any way to bypass this.

nilkash Over a year ago

hi staticVoidMan thank you for your quick replay. I just tested what you said. only thing is that when I click on my notification it launched my application and also execute -didReceiveRemoteNotification method. Then why we have to access it in didFinishLaunchingWithOptions.

nilkash Over a year ago

I am not accepting your answer because I am waiting for my problem answer but your answer is also gives good idea.Thank you.

staticVoidMan Over a year ago

@nilkash : two scenarios: first... your app is closed (like totally closed i.e not in your currently running apps list) then the push notification is accessible in the -didFinishLaunchingWithOptions: method. second... your app is running (but in background). Now the push notification is accessible in the -didReceiveRemoteNotification: method. Do one thing: quit your app, send a push notification and try to access it.

|

Shobhit Srivastava · Accepted Answer · 2015-04-23 14:34:42Z

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.

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