ios - Removing a notification from notification center on click

Question

Is it possible to remove the push notification from the notification center when one is clicked and the app launches?

Most apps seem to leave the notification in place. I read on another question that this:

[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0]; 

may work however it doesn't work for me.

The Facebook app definitely seems to remove the push notifications once clicked on.

Answer 1

int badgeCount = [UIApplication sharedApplication].applicationIconBadgeNumber;
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:badgeCount];

If you add this to both

- (void)applicationWillEnterForeground:(UIApplication *)application

And

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions (NSDictionary *)launchOptions

You will retain the badge count, and clear the push notification when it is clicked in the notification center.