Crown rotate event for WatchKit

crownRotation.swift

import WatchKit
import Foundation


class InterfaceController: WKInterfaceController, WKCrownDelegate {

    @IBOutlet var skInterface: WKInterfaceSKScene!
 
    override func awake(withContext context: Any?) {
        super.awake(withContext: context)
        
        // start listening to crown
        crownSequencer.delegate = self
        crownSequencer.focus()
        
        ...
    }
    
    func crownDidRotate(_ crownSequencer: WKCrownSequencer?, rotationalDelta: Double) {
        
        // convert crown rotation to CGFloat
        let step   = NSNumber.init(value: rotationalDelta * 20.0).floatValue
        let cgStep = CGFloat(step)
        
        // log whats happened
        print("Crown: \(cgStep)")

        gameScene.doSomething(amountX: cgStep, amountY: 0)
    }
    
    ...
    
}