如何将leftBarButtonItem添加到ABPeoplePickerNavigationController？

Question

试过这个，但不起作用：

ABPeoplePickerNavigationController * people_picker = [[ABPeoplePickerNavigationController alloc] init];

people_picker.peoplePickerDelegate = self;

self.navigationController.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle: @"send" 
       style: self.navigationController.navigationItem.rightBarButtonItem.style
      target: self
      action: @selector(cancelAddressBook)] autorelease];

[self.navigationController presentModalViewController: people_picker animated: YES];

Answer 1

您应该设置新创建的人员选取器控制器的topViewController的leftBarButtonItem。

ctrl.topViewController.navigationItem.leftBarButtonItem = ...

Answer 2

由于人物选择器是模态视图，您需要直接向其添加按钮，而不是向导航控制器添加。试试这个：

people_picker.navigationBar.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle: @"send" 
   style: self.navigationController.navigationItem.rightBarButtonItem.style
  target: self
  action: @selector(cancelAddressBook)] autorelease];