Returns the minimum track image associated with the specified control state.
- iOS 2.0+
The control state whose minimum track image you want to use. Specify a single control state value for this parameter.
The minimum track image associated with the specified state, or
nil if no image has been set. This method might also return
nil if you specify multiple control states in the
state parameter. For a description of track images, see Customizing the Slider’s Appearance.