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POABAddressBook external callback not called in iOS
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  1. POABAddressBook external callback not called in iOS
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    copied!<p>I have a class holding the list of contacts of my user in an iPhone app. </p> <p>The core of it is implemented as follows. </p> <pre><code>//file Contacts.m //imports here void MyAddressBookExternalChangeCallback ( ABAddressBookRef addressBook, CFDictionaryRef info, void *context ) { NSLog(@"callback called "); [[Contacts sharedInstance] refresh]; } @implementation Contacts @synthesize addressBook; + (Contacts*)sharedInstance { @synchronized(self) { if (sharedInstance == nil) { sharedInstance = [[Contacts alloc] init]; } } return sharedInstance; } - (void)refresh { ABAddressBookRevert(addressBook); /*refreshing the address book in case of changes*/ [people release]; people = (NSArray*)ABAddressBookCopyArrayOfAllPeople(addressBook); } - (id)init { if ((self = [super init])) { sharedInstance = self; addressBook = ABAddressBookCreate();; people = nil; [self refresh]; ABAddressBookRegisterExternalChangeCallback ( addressBook, MyAddressBookExternalChangeCallback, self ); } return sharedInstance; } </code></pre> <p>In <code>init</code>, I setup an external callback <code>MyAddressBookExternalChangeCallback</code> to be notified of changes to the contact list. The problem that I have is that the external callback is not called (I never see the result of the nslog message) when I add a contact in the iPhone phone app. </p> <p>What did I do wrong ? </p> <p>Added note: even stranger, if I do</p> <pre><code>ABAddressBookRevert(addressBook); </code></pre> <p>every time my app come to the front and the address book has been modified, then the callback is called. </p>
 

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