Custom images not showing

[jduerr]

Hi, first of all - thanks for sharing this project online ! For me, only one thing seems to not work as suspected: I add the slider as UIView, change custom class UIGradient Slider and start editing the standard values in inspector view. If setting color for thumb, the color shows. If setting an image as the thumb control in inspector, the thumb control is white, but image not showing. Also the min and max image do not show.

am I using it wrong?