通讯簿回调未调用 [英] Address Book callback not called

问题描述

我有一个iPhone应用程序，该应用程序使用AddressBook.framework并使用Core Data来存储这些联系人。为了确保在更新通讯簿时（无论是通过MobileMe还是在我自己的应用程序中进行编辑）更新我自己的数据库，我订阅了有关通讯簿何时更新的通知。我在启动时称其为：

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

哪个（据说）在任何编辑中都调用它。我有一个允许编辑的ABPersonViewController，并且addressBookChanged似乎从未被调用。 * context）{
//我们需要调用
ContactsController的联系人控制器* contacts =（ContactsController *）context;

//与通讯簿同步
[contacts syncizeWithAddressBook：reference];
}

是否有任何理由不予称呼？

解决方案

原来，没有被调用的原因很简单。我做到了：

  CFRelease（book）; 
  

设置通知后。我删除了它，现在它被调用了。

I have an iPhone app that makes use of the AddressBook.framework and uses Core Data to store these contacts. In order to make sure I update my own database when the Address Book is updated (whether via MobileMe or editing within my own app), I am subscribing to the notification as to when the Address Book is updating. I call this on startup:

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

Which (supposedly) calls this on any editing. I have an ABPersonViewController which allows editing, and addressBookChanged never seems to get called.

void addressBookChanged(ABAddressBookRef reference, CFDictionaryRef dictionary, void *context) {
    // The contacts controller we need to call
    ContactsController *contacts = (ContactsController *)context;

    // Sync with the Address Book
    [contacts synchronizeWithAddressBook:reference];
}

Is there any reason for it to not be called?

解决方案

It turns out the reason it wasn't getting called was a simple mistake. I did:

CFRelease(book);

After setting the notification. I removed that and it's now getting called.

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