Referencing the documentation you can change properties of the UISlider in many ways.
How would you edit a slider in Rubymotion to set for instance a minimumValueImage
?
slider = UISlider.alloc.initWithFrame([[50, 50], [200, 40]])
# ???
mininumValueImage
is a property of UISlider. So you can set it like this:
slider.minimumValueImage = UIImage.imageNamed("sliderMinValueImage")