Периодическая ошибка при доступе к базовой модели данных / базе данных контактов

Question

Я получаю ошибку в своем приложении для iOS. К сожалению, это прерывистая ошибка - выполняемая мною задача 5 или 6 раз подряд неожиданно завершается. Журнал ошибок указывает на ошибку при открытии базы данных sqlite - предположительно модель основных данных в моем приложении. Однако XCode показывает, что строка, в которой происходит ошибка, обращается к базе данных контактов Apple. Поэтому мне не ясно, что случилось. Журнал ошибок находится ниже. Кто-нибудь может истолковать вывод ниже и пролить свет на это?

    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
2012-03-29 11:43:13.813 iPT[10500:11303] Error loading /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/DataClassMigrators/AccountMigrator.migrator/AccountMigrator:  dlopen(/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/DataClassMigrators/AccountMigrator.migrator/AccountMigrator, 265): no suitable image found.  Did find:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/DataClassMigrators/AccountMigrator.migrator/AccountMigrator: open() failed with errno=24
2012-03-29 11:43:13.814 iPT[10500:11303] [+[AccountsManager _migrateAccountsIfNeeded]] Accounts migration failed
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 WHERE ROWID = ?;: unable to open database file

Код, который я выполняю, когда происходит сбой, ...

Client *client = [mutableFetchResults objectAtIndex:loop];
            ABRecordID recordID = [client.addressBookID intValue];
            ABRecordRef person = ABAddressBookGetPersonWithRecordID (addressBook,recordID);
            NSString *clientFirstName = (NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
            NSString *clientLastName = (NSString *)ABRecordCopyValue(person, kABPersonLastNameProperty);
            NSString *clientCompositeName = [NSString stringWithFormat:@"%@ %@", clientFirstName, clientLastName];

Answer 1

Я полагаю, вы объявляете адресную книгу следующим образом?

    ABAddressBookRef addressBook = ABAddressBookCreate();