Custom figure doesn't display in Today Extension - swift

Question

I make progress circle in today extension. I create additional class for it. I can see it in storyboard with help of IBDesignable. But circle doesn't appear in today extension on real device ( iPhone 5s, iPad 3) or simulator. How can I fix it?
import UIKit
#IBDesignable
class CPUView: UIView {
// MARK: - colors
#IBInspectable var firstColor: UIColor = UIColor.blackColor()
#IBInspectable var secondColor: UIColor = UIColor.greenColor()
#IBInspectable var thirdColor: UIColor = UIColor.yellowColor()
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect) {
// Drawing code
self.addCircle(10, capRadius: 0.0)
}
func addOval(lineWidth: CGFloat, path: CGPath, strokeColor: UIColor, fillColor: UIColor, strokeStart: CGFloat, strokeEnd: CGFloat) {
let shape = CAShapeLayer()
shape.lineWidth = lineWidth
shape.path = path
shape.strokeColor = strokeColor.CGColor
shape.fillColor = fillColor.CGColor
shape.strokeStart = strokeStart
shape.strokeEnd = strokeEnd
layer.addSublayer(shape)
}
func addCircle(arcRadius: CGFloat, capRadius: CGFloat) {
let X = CGRectGetMidX(self.bounds)
let Y = CGRectGetMidY(self.bounds)
let firstPathCircle = UIBezierPath(ovalInRect: CGRectMake(X - arcRadius/2, Y - arcRadius/2, arcRadius, arcRadius)).CGPath
self.addOval(0.1, path: firstPathCircle, strokeColor: UIColor.redColor(), fillColor: UIColor.yellowColor(), strokeStart: 0.0, strokeEnd: 0.5)
}
}
UPDATE
I tried to write the code in drawRect but I got the same result
override func drawRect(rect: CGRect) {
// Drawing code
let x = CGRectGetMidX(self.bounds)
let y = CGRectGetMidY(self.bounds)
let radius = CGFloat()
let path = UIBezierPath(ovalInRect: CGRectMake(x - radius/2, y - radius, 100, 100)).CGPath
let shape = CAShapeLayer()
shape.lineWidth = 0.0
shape.fillColor = UIColor.greenColor().CGColor
shape.path = path
layer.addSublayer(shape)
}

Answer 1

I wrote the following code and it works for me
override func viewDidLoad() {
super.viewDidLoad()
self.preferredContentSize = CGSize(width: self.view.frame.width, height: 200.0)
}