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POHow to optimize core data NSFetchedResultsController with UISearchBar?
 

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  1. POHow to optimize core data NSFetchedResultsController with UISearchBar?
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    <p>I have a <code>UISearchBar</code> that is hooked up with a <code>NSFetchedResultsController</code>.</p> <p>It searches as the user enters text into the search bar. I notice for the first few letters it lags, but then it quickens up and their is no lag. Is there any way to reduce the initial lag and make the search very snappy?</p> <pre><code>- (void)filterResultsUsingString:(NSString *)filterString { self.billingSearchText = filterString; NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; NSEntityDescription *entity = nil; if ([self.billingSearchCategory isEqualToString:@"icd9"]) { entity = [NSEntityDescription entityForName:@"ICD9" inManagedObjectContext:managedObjectContext]; } else if ([self.billingSearchCategory isEqualToString:@"cpt"]) { entity = [NSEntityDescription entityForName:@"CPT" inManagedObjectContext:managedObjectContext]; } [fetchRequest setEntity:entity]; [sortDescriptors release]; [sortDescriptor release]; self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:@"Root"]; [fetchRequest release]; NSPredicate *predicate =[NSPredicate predicateWithFormat:@"(name contains[cd] %@) OR (code contains[cd] %@)", self.billingSearchText, self.billingSearchText]; [self.fetchedResultsController.fetchRequest setPredicate:predicate]; NSError *error = nil; if (![[self fetchedResultsController] performFetch:&amp;error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); exit(-1); // Fail } [self.tableView reloadData]; } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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