Easy add images or change colors of a ui.Slider
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Example:
# ui.Slider is an UISlider # we can set its images/colors via Objective-C volume_slider = ui.Slider() objc = ObjcInstance(volume_slider) objc.minimumValueImage = ui.Image.named('iob:ios7_volume_low_32') objc.maximumValueImage = ui.Image.named('iob:ios7_volume_high_32') objc.thumbTintColor = ObjCClass('UIColor').color(red=1.0, green=0.0, blue=0.0, alpha=1.0)