Custom "Pressed" UIBarButtonItem Backgrounds

Question

I'm trying to set a custom pressed image for my UIBarButtonItem but nothing seems to be working. From my understanding, the code below should work, but despite setting the image for the highlighted state, the button looks exactly the same when pressed.

Any ideas?

UIImage *barButtonBackground = [[UIImage imageNamed:ANBarButtonItemBackgroundImageName] resizableImageWithCapInsets:UIEdgeInsetsMake(5.0f,5.0f, 5.0f, 5.0f)];
UIImage *barButtonPressedBackground = [[UIImage imageNamed:ANBarButtonPressedImageName] resizableImageWithCapInsets:UIEdgeInsetsMake(5.0f,5.0f, 5.0f, 5.0f)];

[self.navigationItem.leftBarButtonItem setBackgroundImage:barButtonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self.navigationItem.rightBarButtonItem setBackgroundImage:barButtonBackground forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

[self.navigationItem.leftBarButtonItem setBackgroundImage:barButtonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[self.navigationItem.rightBarButtonItem setBackgroundImage:barButtonPressedBackground forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];

Answer 1

I think you should create a custom UIButton with background images for the different control states that match your color scheme, then use this UIButton as the view for a custom UIBarButtonItem.

UIButton *customButton = [UIButton buttonWithType:...];

[customButton setBackgroundImage:barButtonBackground  forState:UIControlStateNormal];
[customButton setBackgroundImage:barButtonPressedBackground  forState:UIControlStateSelected];

UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView: customButton];

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