访问核心数据模型/联系人数据库的间歇性错误

我在我的iOS应用程序中出现错误。 令人沮丧的是,这是一个间歇性的错误 – 我正在执行的任务连续工作5或6次,然后意外崩溃。 错误日志build议打开一个sqlite数据库的错误 – 大概是我的应用程序的核心数据模型。 但是,Xcode显示发生错误的行正在访问Apple联系人数据库。 所以我不清楚发生了什么事。 错误日志如下。 任何人都可以解释下面的输出,并阐明这一点?

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 

我发生崩溃时执行的代码是…

 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]; 

我假设你正在以下面的方式声明地址簿?

  ABAddressBookRef addressBook = ABAddressBookCreate();