ios5.1 - 无法在 ipad 上显示 rightBarButtonItem

Question

这是我的代码：

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:vc];
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:@"RETURN" style:UIBarButtonItemStylePlain target:self action:@selector(refreshPropertyList:)];
navigationController.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];       
[IpadAppDelegate.stackController presentModalViewController:navigationController animated:YES];

Answer 1

我找出原因：

需要改变navigationController.navigationItem.rightBarButtonItem = anotherButton;

到：self.navigationItem.rightBarButtonItem = anotherButton;