A vertical slider UIControl element written in swift

The easiest way to add a NapySlider is in the storyboard. Add a UIView element and set its custom Class to NapySlider. Now you can define the inspectable properties, like min, max, step and all the colors.

And don't forget to modify the tintColor

Of course, you can add a slider by code.

var myNapySlider:NapySlider!

// add this lines to the viewDidLoad function, or wherever you like
myNapySlider = NapySlider(frame: yourFrame)
myNapySlider.min = 0
myNapySlider.max = 100
myNapySlider.step = 20

view.addSubview(myNapySlider)