One Quickie

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Add a cancel button to a navigation bar. (UINavigationController->General)

In your -viewDidLoad :

    UIBarButtonItem *cancelButton =
	[[UIBarButtonItem alloc] initWithTitle: @"Cancel"
                                 style: UIBarButtonItemStylePlain
                                 target: self
                                 action: @selector(cancel:)];
    self.navigationItem.rightBarButtonItem = cancelButton;
    [cancelButton release];