The minimum track image currently being used to render the slider.
- iOS 2.0+
Sliders can have different track images for different control states. The active control state determines which minimum track image is stored in this property. To get the minimum track image for a different control state, use the
If no custom track images have been set using the
set method, this property contains the value
nil. In that situation, the slider uses the default minimum track image for drawing.