uitoolbar in navigation bar. - iphone

Question

this is a simple problem, but i'm new to xcode dev. I followed a guide online to have multiple buttons on a navigation bar. the edit button on the navgivation bar has a IBAction method called "editButton". which has a (id)sender as parameter. do I get the sender and change the text from edit to done, done to edit?
"UIBarButtonitem *bbi = (UIBarButonItem *) sender;" doesn't seem to be working. how do i get the button in the toolbar in navigationbar?
Thank you.
UIToolbar* tools = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 133, 44.01)];
// create the array to hold the buttons, which then gets added to the toolbar
NSMutableArray* buttons = [[NSMutableArray alloc] initWithCapacity:3];
// create a standard "add" button
UIBarButtonItem* bi = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:NULL];
bi.style = UIBarButtonItemStyleBordered;
[buttons addObject:bi];
[bi release];
// create a spacer
bi = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[buttons addObject:bi];
[bi release];
// create a standard "EDIT" button
bi = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:#selector(editButton:)];
bi.style = UIBarButtonItemStyleBordered;
[buttons addObject:bi];
[bi release];
// stick the buttons in the toolbar
[tools setItems:buttons animated:NO];
[buttons release];
// and put the toolbar in the nav bar
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:tools];
[tools release];
-(IBAction)editButton:(id) sender{
UIBarButtonitem *bbi = (UIBarButonItem *) sender;
if (bbi title isequalsString:#"Done){
[bbi setTitle:#"Edit"];
}
}else{
[bbi setTitle:#"Done"];
}
}

Answer 1

The trouble is that you have used a UIBarButtonSystemItemEdit, not a standard uibarbutton.
Try creating it with:
bi = [UIBarButtonItem alloc] initWithTitle:#"Edit" style: UIBarButtonItemStyleBordered target:self action:#selector(editButton:)];
Then use the rest of the code as is.

Answer 2

UIBarButtonSystemItemEdit is a special bar button item that takes care of the "Edit / Done" states for you. No need to manually change the button's text.