Use pre-loaded CoreData file

- (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;
}