Use o arquivo CoreData pré-carregado

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil)
{
return _persistentStoreCoordinator;
}

NSURL
*storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"newCoreDataFile.sqlite
"
];

NSError *error = nil;



if (![[NSFileManager defaultManager] fileExistsAtPath:[[[self applicationDocumentsDirectory] path]
stringByAppendingPathComponent
: @"newCoreDataFile.sqlite
"
]]){
//database not detected
NSLog(@"database not detected");
NSURL
* defaultDatabase = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"sourceCoreDataFile" ofType:@"sqlite"]];
NSError * error;
if (![[NSFileManager defaultManager] copyItemAtURL:defaultDatabase toURL:storeURL error:&error]){
// Handle Error somehow!
NSLog(@"copy file error, %@", [error description]);
}
}

_persistentStoreCoordinator
= [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error])
{

NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort
();
}

return _persistentStoreCoordinator;
}