UINavigationBar question

I added a UINavigationBar to my UIView

I am trying to set its title , and its leftbar byut it failed

I use the following code

self.title = @"Edit Table ";
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonIte开发者_如何学JAVAmStyleBordered target:self action:@selector(EditTable:)];
[self.navigationItem setLeftBarButtonItem:addButton];
[super viewDidLoad];

nothing be changed , I call this uiview using

self.NodeSelection = [[NodesList alloc]initWithNibName:@"NodesList" bundle:nil];
[self presentModalViewController:self.NodeSelection animated:YES];

any suggestion please

Update

Call this View using

[self.navigationController pushViewController:self.NodeSelection animated:YES];

You can change the title of NavigationBar using this

self.navigationItem.title = @"Hello";

and For leftBarButton your code is right.

Second Update

For return to parent screen

 [self.navigationController popViewControllerAnimated:YES];

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self action:@selector(EditTable:)];
[self.navigationItem setLeftBarButtonItem:addButton];
[addButton release];