iOS Knob Control

This is a generic, reusable knob control you can insert into any application. You may provide custom knob images or use the customizable default images. The control animates rotation of the image in response to one of several configurable gestures from the user. The knob has a number of configurable modes, including continuous, discrete and rotary dial. It includes two fully functional, identical sample apps, one in Swift and one in Objective-C. The control is written in Objective-C and supports iOS 6+. It is distributed as a single .h, .m file pair you insert into your project.