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私は3つの異なるNSFetchedResultsControllerを使用して、sqliteデータベースからデータレコードを取得しています。そのうちの1人が、デバイス（iOS 3.1.3）でテストしたときに苦労しています。シミュレータ（iOS 4.2、deploymentTarget 3.1.3）で実行するとうまく動作します。未知のオブジェクトを返すFetchedResultsController
デバイス上でフェッチすると、NSDictionariesでもないオブジェクトも、要求どおりにフォルトが返されます。ここで
はfetchedResultsControllerの定義です：シミュレータで
- (void) searchLocationsDBWithFRCFor: (NSString *) locationName
{
[NSFetchedResultsController deleteCacheWithName: kLocationDatabaseAltNameLocIDRequestCacheName];
NSString *normLocationName = [self normalizeString: locationName];
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"(%K >= %@) && (%K <= %@)", kLocationsDatabaseLocationSearchNameKeyPath, normLocationName, kLocationsDatabaseLocationSearchNameKeyPath, [self upperBoundSearchString: normLocationName]];
[[self.fetchedResultsControllerForLocID fetchRequest] setPredicate: searchPredicate];
NSError *error = nil;
if (![self.fetchedResultsControllerForLocID performFetch:&error])
{
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
//this line craches on the device:
for(NSDictionary* tempIDDict in [self.fetchedResultsControllerForLocID fetchedObjects])
{
[tempArray addObject: [tempIDDict objectForKey: kLocationsDatabaseLocationIDKeyPath]];
}
searchPredicate = [NSPredicate predicateWithFormat:@"(%K IN %@)", kLocationsDatabaseLocationIDKeyPath, tempArray];
[tempArray release];
//some more fetching...
}
を、私はこれらのSQL-コールバックを得る：
2011-01-22 20:31:33.660 App[24386:207] CoreData: sql: pragma cache_size=200
2011-01-22 20:31:33.661 App[24386:207] CoreData: sql: SELECT Z_VERSION, Z_UUID, Z_PLIST FROM Z_METADATA
2011-01-22 20:31:33.664 App[24386:207] CoreData: sql: SELECT DISTINCT t0.ZLOCATIONID FROM ZALTERNATENAME t0 WHERE (t0.ZLOCATIONSEARCHNAME >= ? AND t0.ZLOCATIONSEARCHNAME <= ?) ORDER BY t0.ZLOCATIONID
2011-01-22 20:31:33.666 App[24386:207] CoreData: annotation: sql connection fetch time: 0.0015s
2011-01-22 20:31:33.666 App[24386:207] CoreData: annotation: total fetch execution time: 0.0024s for 6 rows.
しかしここで
- (NSFetchedResultsController *)fetchedResultsControllerForLocID
{
if (_fetchedResultsControllerForLocID != nil)
return _fetchedResultsControllerForLocID;
NSSortDescriptor *sortDescriptor_00 = [[NSSortDescriptor alloc] initWithKey: kLocationsDatabaseLocationIDKeyPath
ascending: TRUE];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects: sortDescriptor_00, nil];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName: kLocationsDatabaseAlternateNameEntityName
inManagedObjectContext: self.managedObjectContext];
[fetchRequest setEntity:entity];
[fetchRequest setFetchBatchSize: 80];
[fetchRequest setResultType: NSDictionaryResultType];
[fetchRequest setPropertiesToFetch: [NSArray arrayWithObject: kLocationsDatabaseLocationIDKeyPath]];
[fetchRequest setReturnsDistinctResults: TRUE];
[fetchRequest setReturnsObjectsAsFaults: FALSE];
[fetchRequest setSortDescriptors: sortDescriptors];
NSFetchedResultsController *theFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest: fetchRequest
managedObjectContext: self.managedObjectContext
sectionNameKeyPath: nil
cacheName: kLocationDatabaseAltNameLocIDRequestCacheName];
self.fetchedResultsControllerForLocID = theFetchedResultsController;
[fetchRequest release];
[theFetchedResultsController release];
[sortDescriptor_00 release];
[sortDescriptors release];
return _fetchedResultsControllerForLocID;
}
は、実際のフェッチでありますデバイス上で実行すると、私にはこれが与えられます：
2011-01-22 20:39:07.318 App[241:207] CoreData: sql: pragma cache_size=1000
2011-01-22 20:39:07.324 App[241:207] CoreData: sql: SELECT Z_VERSION, Z_UUID, Z_PLIST FROM Z_METADATA
2011-01-22 20:39:07.348 App[241:207] CoreData: sql: SELECT 0, t0.Z_PK FROM ZALTERNATENAME t0 WHERE (t0.ZLOCATIONSEARCHNAME >= ? AND t0.ZLOCATIONSEARCHNAME <= ?) ORDER BY t0.ZLOCATIONID
2011-01-22 20:39:07.386 App[241:207] CoreData: annotation: sql connection fetch time: 0.0374s
2011-01-22 20:39:07.388 App[241:207] CoreData: annotation: total fetch execution time: 0.0404s for 16 rows.
2011-01-22 20:39:07.400 App[241:207] CoreData: sql: SELECT DISTINCT t0.ZLOCATIONID FROM ZALTERNATENAME t0 WHERE t0.Z_PK IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?) ORDER BY t0.ZLOCATIONID LIMIT 80
2011-01-22 20:39:07.407 App[241:207] CoreData: annotation: sql connection fetch time: 0.0061s
2011-01-22 20:39:07.409 App[241:207] CoreData: annotation: total fetch execution time: 0.0085s for 6 rows.
ない、あまりにも悪い、それはエラーが続いていなかった場合：デバイス上で動作しているとき
2011-01-22 20:39:07.411 App[241:207] *** -[NSKnownKeysDictionary1 objectID]: unrecognized selector sent to instance 0x1e4f80
2011-01-22 20:39:07.414 App[241:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSKnownKeysDictionary1 objectID]: unrecognized selector sent to instance 0x1e4f80'
2011-01-22 20:39:07.417 App[241:207] Stack: (
861696817,
860329709,
861700631,
861203093,
861166272,
832412333,
832413791,
77245,
66451,
66643,
845720837,
861449139,
861447005,
861059891,
861060063,
834770799,
834765939,
12391,
12316
)
terminate called after throwing an instance of 'NSException'
Program received signal: “SIGABRT”.
はなぜCore Dataは、クエリを変更していますか？
正確にNSKnownKeysDictionary1とは何ですか？そして、なぜコントローラのfetchedObjectsにアクセスしようとすると私のデバイスにエラーが出るのですか？
アイデア？前もって感謝します！