iOS: How to add an Info Button to the right button slot in a Navigation Bar

ios_nav_bar_info_button.m

// This is assumed to be inside a UINavigationController
-(void)awakeFromNib
{
    // How to turn a NavigationItem's rightBarButtonItem into an Info Button
    // First, in your storyboard or xib add a Bar Button Item to the right slot in the navigation bar.
    // Then, do this:
    UIButton *infoLightButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
    infoLightButton.frame = CGRectMake(0.0, 0.0, 25.0, 25.0);
    infoLightButton.backgroundColor = [UIColor clearColor];
    [infoLightButton addTarget:self action:@selector(showInfo:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *infoButton = [[UIBarButtonItem alloc] initWithCustomView:infoLightButton];
    self.navigationItem.rightBarButtonItem = infoButton;
}