Objective-C Fundamentals

Building the PocketTasks application
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}
action:@selector(addPerson)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
- (void)addPerson {
PersonDetailViewController *detailController =
[[PersonDetailViewController alloc]
initWithManagedObjectContext:managedObjectContext];
UINavigationController *controller =
[[UINavigationController alloc]
initWithRootViewController:detailController];
Create a
PersonDetailViewController
detailController.navigationItem.rightBarButtonItem =
[[[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemSave
target:detailController
action:@selector(saveAndDismiss)]
autorelease];
Add a Save
button
}
[self presentModalViewController:controller animated:YES];
[controller release];
[detailController release];
Present it
modally
- (void)tableView:(UITableView *)tableView
commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[managedObjectContext deleteObject:[resultsController
objectAtIndexPath:indexPath]];
}
}
NSError *error = nil;
if (![managedObjectContext save:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
Delete the Core
Data object
- (void)controllerWillChangeContent:
(NSFetchedResultsController *)controller {
}
[self.tableView beginUpdates];
Set table view
for changes
- (void)controller:(NSFetchedResultsController *)controller
didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath
forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath {
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[self.tableView
Content changes from
results controller