ABAddressBookCreate() , ABAddressBookGetGroupCount , ...返回@“0x00000000 <nil>”？

Question

我正在尝试获取组名称，但在多次调用此方法“由用户重新加载联系人”后，它给出了 nil 值和以下错误。

-(void) getGroupsName
    {
        [groupsName removeAllObjects];
        //address book object to interact with iPhone contacts.
        ABAddressBookRef addressbook = ABAddressBookCreate();
        //get groups count
        CFIndex groupsCount          = ABAddressBookGetGroupCount(addressbook);
        //get all available groups as array
        CFArrayRef allGroups         = ABAddressBookCopyArrayOfAllGroups(addressbook);

        for (int i = 0; i<groupsCount; i++) {
            //get group of index=i from groups array
            ABRecordRef group = CFArrayGetValueAtIndex(allGroups, i);
            //get group name, I use __bridge_transfer to transfer from C to objective-c.
            [groupsName addObject:(__bridge_transfer NSString*)ABRecordCopyCompositeName(group)];

        }
        CFRelease(allGroups);
        CFRelease(addressbook);
    }
//////////////////////////////////////////////////////////////

    warning: Could not compile statement PRAGMA journal_mode = wal;: unable to open database file error 14 creating properties table: unable to open database file warning: Could not compile statement SELECT value FROM _SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement SELECT value FROM _SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement SELECT value FROM
_SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement SELECT ROWID, First, Last, Middle, NULL, NULL, NULL, Organization, NULL, NULL, Kind, NULL, NULL, Nickname, Prefix, Suffix, FirstSort, LastSort, CreationDate, ModificationDate, CompositeNameFallback, NULL, StoreID, NULL, FirstSortSection, LastSortSection, FirstSortLanguageIndex, LastSortLanguageIndex, NULL, NULL, NULL, PersonLink, NULL, IsPreferredName FROM ABPerson;: unable to open database file warning: Could not compile statement SELECT ROWID, First, Last, Middle, NULL, NULL, NULL, Organization, NULL, NULL, Kind, NULL, NULL, Nickname, Prefix, Suffix, FirstSort, LastSort, CreationDate, ModificationDate, CompositeNameFallback, NULL, StoreID, NULL, FirstSortSection, LastSortSection, FirstSortLanguageIndex, LastSortLanguageIndex, NULL, NULL, NULL, PersonLink, NULL, IsPreferredName FROM ABPerson;: unable to open database file warning: Could not compile statement INSERT OR REPLACE INTO _SqliteDatabaseProperties VALUES (?, ?);: unable to open database file warning: Could not compile statement SELECT value FROM
_SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement INSERT OR REPLACE INTO
_SqliteDatabaseProperties VALUES (?, ?);: unable to open database file warning: Could not compile statement SELECT value FROM
_SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement SELECT value FROM
_SqliteDatabaseProperties WHERE key = ?;: unable to open database file warning: Could not compile statement SELECT ROWID FROM ABGroup;: unable to open database file warning: Could not compile statement SELECT ROWID, Name, ExternalIdentifier, StoreID, NULL, NULL, NULL FROM ABGroup;: unable to open database file

所以我使用本机通知让我知道 addressbook 何时被修改以减少我访问 addressbook 的次数，但如果用户每次都进行多次更新，那么到那时仍然不好addrssbook 得到修改必须调用这个杂项或任何其他与addressbook 相关的名称。

所以还需要你的帮助？？？

Answer 1

ABAddressBookCreate 在 iOS6 中已被弃用。使用ABAddressBookCreateWithOptions，如果您无权访问地址簿，它将返回一个CFErrorRef 对象。

Answer 2

您为什么不尝试使用以下方法尽量减少创建和访问ABAddressBookRef 的时间：

void ABAddressBookRegisterExternalChangeCallback (
   ABAddressBookRef addressBook,
   ABExternalChangeCallback callback,
   void *context
);

这允许您的应用知道地址簿何时被外部修改。并让您知道您需要重新访问地址簿。

与您发布它的方法相同，每次调用它都会创建具有新访问地址簿的新对象

Answer 3

正如@thelaws 所指出的，您必须在 IOS6 中使用 ABAddressBookCreateWithOptions。 if ([[[UIDevice currentDevice] systemVersion] floatValue] > 5.1) {

   ABAddressBookRef ab = ABAddressBookCreateWithOptions(NULL, NULL);
    __block BOOL accessGranted = NO;
    if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {
        ABAddressBookRequestAccessWithCompletion(ab, ^(bool granted, CFErrorRef error) {
            // First time access has been granted, add the contact
            accessGranted = granted;
        });
    }
    else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized)        {
        // The user has previously given access, add the contact
        accessGranted = YES;
    }
    else {
        // The user has previously denied access
        // Send an alert telling user to change privacy setting in settings app
    }
    if (accessGranted) {
// your code goes here
 }
}
else {
// your code goes here
}

另一件事是你有没有初始化，groupsName 某处？..

除此之外，您是否使用 ABExternalChangeCallBack 来获取地址簿更改的通知？

我认为您应该将组代码放在您访问联系人的同一模块中。 （如果这对您没有帮助，请澄清！）