title: how to add custom bar button item to navigation bar in AddressBookUI application like edit in place of cancel
body: <p>I can not understand  why navigation bar is not going to add any button   other than cancel button  in Following code
     this kind of thing done in Viber application so it is possible</p>
  
  <pre><code> ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController     alloc] init];
  picker.navigationBar.tintColor=[UIColor colorWithRed:91.0/256.0 green:72.0/256.0 blue:110.0/256.0 alpha:1.0];
  //picker.navigationController.navigationBar.topItem.rightBarButtonItem = nil;
  [picker.navigationBar setHidden:NO];
  picker.peoplePickerDelegate = self;
  // Display only a person's phone, email, and birthdate
  NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], 
                             [NSNumber numberWithInt:kABPersonEmailProperty],
                             [NSNumber numberWithInt:kABPersonBirthdayProperty], nil];
  
  //picker.navigationBarHidden=TRUE;
  picker.displayedProperties = displayedItems;
  //UIBarButtonItem *addbutton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(AddContact)];          
     //   picker.navigationController.navigationBar.topItem.rightBarButtonItem = addbutton;
  
  [self presentModalViewController:picker animated:NO];
  [picker release];
  //[addbutton release];
  </code></pre>
  
  <p>can anybody help please</p>