Seyfo #7

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
    label.hidden = true
    
    for touch in touches
    {
        let circle = CircleWithLabel()
        
        circle.drawAtPoint(touch.locationInView(view),
            force: touch.force / touch.maximumPossibleForce)
        
        circles[touch] = circle
        view.layer.addSublayer(circle)
    }
    
    highlightHeaviest()

}