KnobGestureRecognizer

Features

• knob gesture
• get rotation radians of gesture
• set center of knob rotation
• get distance from center to touch (radius)
• get rotation direction (clockwise/ counter clockwise)

Usage

1. Import KnobGestureRecognizer module to your UIView class/subclass

   import KnobGestureRecognizer

2. Add gesture recognizer KnobGestureRecognizer to view

   override func awakeFromNib() {
       super.awakeFromNib()

       let gesture = KnobGestureRecognizer(target: self, action: #selector(rotationAction(_:)), to: controlView)

       gesture.delegate = self
       controlView.addGestureRecognizer(gesture)
   } 

3. Processing callback

    @objc fileprivate func rotationAction(_ sender: KnobGestureRecognizer) {
         ...
      }

Installation with CocoaPods

To install via CocoaPods add this lines to your Podfile. You need CocoaPods v. 1.1 or higher

  $ gem install cocoapods

Podfile

To integrate KnobGestureRecognizer into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '9.0'
use_frameworks!

target 'TargetName' do
  pod 'KnobGestureRecognizer', '~> 1.0'
end

Then, run the following command:

  $ pod install

Properties

Rotation in radians

fileprivate(set) open var rotation: CGFloat = 0.0

Rotation direction

fileprivate(set) open var clockwiseDirection: Bool = true

Distance from anchor point

fileprivate(set) open var radius: Float? = 0.0

Knob center

open var anchor: CGPoint?

License

KnobGestureRecognizer is available under the MIT license. See the LICENSE file for more info.