Register to Addressbook changes, using ABAddressBookRegisterExternalChangeCallback

Question

I really need some help here.

I do exactly the same as in all the examples, but don't get any notification.

Here's my code:

 #import <AddressBook/ABAddressBook.h>
 #import <AddressBook/AddressBook.h>

Registering for notification:

ABAddressBookRef book = ABAddressBookCreate();
ABAddressBookRegisterExternalChangeCallback(book, addressBookChanged, self);

Definition of the callback:

void addressBookChanged(ABAddressBookRef reference, 
                        CFDictionaryRef dictionary, 
                        void *context) 
{

   ViewController *viewController = (ViewController*)context;
   [viewController addressBookChanged];    
}

And another method:

-(void) addressBookChanged
{
   NSLog(@"%@", @"addressBookChanged");
}

• I'm running the app
• Switching to the contacts app
• Adding a new contact
• nothing happens... no log, nothing...

What am I doing wrong here?

• Any ' #import ' missing?
• Should it work on device/simulator?
• Any specific way of declaring the callback? Static maybe?

Any help will be appreciated. Thanks.

Answer 1

Ok, I know the answer now...

The callback is being invoked, but only when I resume back my application.