Drop-In ClickWheel for iOS7+ written in Swift.
ClickWheel basically consits of two buttons on top of each other. One is responsible for the dragging while the inner one only responds to clicks. ClickWheel is built as @IBDesignable class with @IBInspectable attributes. This means that you'll see in Interface Builder right away when you alter a color or the width of the outer wheel. The innner button is created programmatically at run time. However, you can alter the button title also in Interface Builder.
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