UIViewController hidden behind UINavigationController but should be placed below - ios

Question

I'm working on a app where I've got a NavigationBar at the top and added a UIViewController as an RootViewController.
Now my plan was to add a new Subview to this UIViewController. The new Subview extended also of UIViewController. I added de view (Gray Rect) of the controller to the UIViewController but it is placed behind the NavigationBar. I don't want that.. So I searched for a solution and found something interesting..:
When I just add a UIView() (Green Rect) to the UIViewController, the placing of the view works perfectly, as I would love see it from the other UIViewController-View.
My code looks like following:
class DashboardController: UIViewController {
var ccview:ContactCircleController!
override func viewDidLoad() {
super.viewDidLoad()
edgesForExtendedLayout = []
self.view.backgroundColor = .white
let test = UIView()
test.backgroundColor = .green
test.frame = CGRect(x: self.view.frame.width - 200, y: 0, width: self.view.frame.width / 2, height: self.view.frame.width / 2)
self.view.addSubview(test)
setup()
}
func setup(){
ccview = ContactCircleController()
ccview.view.frame = CGRect(x: 0, y: 0, width: self.view.frame.width / 2, height: self.view.frame.width / 2)
ccview.edgesForExtendedLayout = UIRectEdge.top
self.view.addSubview(ccview.view)
}}
I've already unchecked the "Extend Edges" - toggle of the navigationcontroller on the storyboard. I also added edgesForExtendedLayout = [] to the UIViewController and for the UIView it worked fine. But for the view of another UIViewController... it didn't worked.
Thank you!

Answer 1

If you use Debug View Hierarchy, you will see that your gray ccview.view is not behind the navigation bar, but rather it is not keeping the height of self.view.frame.width / 2.
This is because the .view of a UIViewController instantiated from Storyboard has by default an .autoresizingMask = [], whereas the .view of a UIViewController instantiated without a storyboard has a default .autoresizingMask = [.flexibleWidth, .flexibleHeight].
You can correct this by changing setup() to:
func setup(){
ccview = ContactCircleController()
ccview.view.frame = CGRect(x: 0, y: 0, width: self.view.frame.width / 2, height: self.view.frame.width / 2)
// remove this line
//ccview.edgesForExtendedLayout = UIRectEdge.top
// add this line
ccview.view.autoresizingMask = []
self.view.addSubview(ccview.view)
}