How to make UIToolbar have a Clear Background?

Question

I have a UIToolbar that has a white tint, with a bar button item, followed by some flexible space, followed by another bar button item. I would like to make the toolbar complete

Answer 1

Swift 3 version of accepted answer:

   self.toolbar.isTranslucent = true
    self.toolbar.setBackgroundImage(UIImage(),
                               forToolbarPosition: UIBarPosition.any,
                               barMetrics: UIBarMetrics.default)

    self.toolbar.setShadowImage(UIImage(), forToolbarPosition: UIBarPosition.any)