Is it possible to add a UIView as UINavigationBar's background - ios

Question

I'm trying to create a specific background to a UINavigationBar, but I don't want to use images or solid color, I have a custom UIView that i've created and in it's drawRect method I'm drawing some stuff, I want this to be the UINavigationBar's background.
Is it possible?
This is my custom view:
class GradientColorView : UIView {
var colors : NSArray = NSArray() {
didSet {
setNeedsDisplay()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func drawRect(rect: CGRect) {
var topRect : CGRect = CGRectMake(0, 0, rect.size.width, rect.size.height / 2.0)
var firstColor : UIColor = self.colors[0] as! UIColor
firstColor.setFill()
UIRectFill(topRect)
var bottomRect : CGRect = CGRectMake(0, rect.size.height/2.0, rect.size.width, rect.size.height/2.0)
var secondColor : UIColor = self.colors[1] as! UIColor
secondColor.setFill()
UIRectFill(bottomRect)
}
}
And in Swift of course :)

Answer 1

So i've found the answer to my question, what I did is created a UINavigationBar subclass called CustomNavigationBar and override init method like that:
class CustomNavigationBar: UINavigationBar {
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.someColor()
let view : UIView = UIView(frame: CGRectMake(0, 20, frame.size.width, 44))
self.addSubview(view)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func drawRect(rect: CGRect) {
}
}
Then I've added this method on the UIViewController that holds the UINavigationBar:
func styleCustomNavigationBar() {
self.navigationController?.setNavigationBarHidden(true, animated: false)
var navigationBar : CustomNavigationBar = CustomNavigationBar(frame: CGRectMake(0, 0, CGRectGetWidth(self.view.bounds), 64.0))
var navigationItem : UINavigationItem = UINavigationItem()
var backButton : UIBarButtonItem = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.Plain, target: self, action: "backButtonDidClicked")
navigationItem.leftBarButtonItem = backButton
navigationBar.items = [navigationItem]
self.view.addSubview(navigationBar)
}
I used this and question and this website to reach solution.
Enjoy!