ChildViewController and IBOutlet UIView in SWIFT - ios

Question

I spent days to try to solve this problem but can't find any solution (except programmaticaly):
I have 2 UIViewController where the 2nd is a UIChildViewController.
In the ChildViewController I have an IBOutlet UIView class's attribute linked to a CustomClassUIview in the storyboard.
This CustomClassUIview have methods and attribute to update the shape layer define inside this class.
The problem is when I try to access to one attribute of this custom uiview, it returns nil.
I know that the IBOutlet is fired outside viewDidLoad, viewWillAppear,... but I don't know how to keep alloc.
I did with storyboard to be easier to design but if I did this only programmaticaly it works.
Any help please.
class ChildViewController: UIViewController {
#IBOutlet weak var customUIView: CustomClassUIView!
var upperValueProgress:CGFloat = 0 {
didSet {
self.customUIView.progress = upperValueProgress
updateLayerFrames()
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.greenColor()
}
override func viewWillAppear(animated: Bool) {
customUIView.progress = 0
}
func updateLayerFrames() {
customUIView.reveal()
}
}
class FirstViewController: UIViewController {
var customUIViewController:ChildViewController!
override func viewDidLoad() {
super.viewDidLoad()
self.customUIViewController = ChildViewController()
}
...
func update(){
self.customUIViewController.upperValueProgress = 56 // Example
}
,;
#IBDesignable class CustomClassUIview: UIView {
let pathLayer = CAShapeLayer()
var circleRadius: CGFloat {
get {
return self.frame.width / 2
}
set {
}
}
#IBInspectable var progress: CGFloat = 0 {
didSet {
reveal()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
configure()
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
configure()
reveal()
}
func configure() {
pathLayer.frame = self.bounds
pathLayer.lineWidth = 2
pathLayer.backgroundColor = UIColor.clearColor().CGColor
pathLayer.fillColor = UIColor.clearColor().CGColor
pathLayer.strokeColor = UIColor.redColor().CGColor
layer.addSublayer(segmentTimerPathLayer)
backgroundColor = UIColor.whiteColor()
progress = 0
}
func circleFrame() -> CGRect {
var circleFrame = CGRect(x: self.bounds.minX, y: self.bounds.minY, width: 2*circleRadius, height: 2*circleRadius)
circleFrame.origin.x = 0
circleFrame.origin.y = 0
return circleFrame
}
func circlePath() -> UIBezierPath {
return UIBezierPath(ovalInRect: circleFrame())
}
override func layoutSubviews() {
super.layoutSubviews()
pathLayer.frame = bounds
pathLayer.path = circlePath().CGPath
}
func reveal() {
println(progress)
}
}