KnobControl like the UISlider, but in a circular form.
For install open your project's Podfile and add this line to your app's target:
pod 'KnobControl', :git => 'https://github.com/VladimirKhuraskin/KnobControl.git', :tag => '1.0.0'
Then from the command line run:
$ pod install