Controls are the bread-and-butter of iOS apps. There are many provided in UIKit but this tutorial shows you how to make a custom control in Swift.
In this tutorial, you will implement your very own RangeSlider custom control. This control is like a double-ended slider, where you can pick both a minimum and maximum value. You’ll touch on such concepts as extending existing controls, designing and implementing your control’s API, and even how to share your new control with the development community.
