import ProcessingKit
class SampleView: ProcessingView {
    func setup() {
        // The setup() function is run once, when the view instantiated.
    }
    func draw() {
        // Called directly after setup(), the draw() function continuously executes the lines of code contained inside its block until the program is stopped or noLoop() is called.
    }
}

    lazy var sampleView: SampleView = {
        let sampleView = SampleView(frame: frame)
        sampleView.isUserInteractionEnabled = true // If you want to use touch events (default true)
        return sampleView
    }()

 @IBOutlet weak var sampleView: SampleView!
 override func viewDidLoad() {
     super.viewDidLoad()
     sampleView.isUserInteractionEnabled = true // If you want to use touch events (default true)
 }