UINavigationController Image Not centered on all Devices iOS

Question

I have a UINavigationController image that I'm setting in the App Delegate's didFinishLaunchingWithOptions like this:

var image: UIImage = UIImage(named: "Header")!
UINavigationBar.appearance().setBackgroundImage(image, forBarMetrics: .Default)

The Header is the file in the Assets.xcassets with the 2x and 3x size images. I took out the 1x size because I read it was necessary and it wasn't making a difference either way. On an iPhone 6 the image is perfectly centered. While on a iPhone5 it's more to the right. When I put the above code in the viewDidLoad method in my file, I get a blank header.

I also tried resizing the image:

 var image: UIImage = UIImage(named: "Header")!
        image.resizableImageWithCapInsets(UIEdgeInsetsMake(0, -260, 0, 0))
        UINavigationBar.appearance().setBackgroundImage(image, forBarMetrics: .Default)

I even plugged in random numbers to see if anything changes and it doesn't.

Anyone have any idea what to do?

I referenced these links:

1. UINavigationBar custom title position

2. Misaligned title in UINavigationBar since iOS6

3. Center UIImage in UINavigationController

UPDATE

Centering the UIImage on the NavigationBar still doesn't work on the iPhone5.

Answer 1

Below is the code snip i have added in my app delegate. which works perfect for me.

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
    {
        //Cutomize navigation bar
        let navBgImage:UIImage = UIImage(named: "dummy_navigation_bg_image")!
        UINavigationBar.appearance().setBackgroundImage(navBgImage, forBarMetrics: .Default)
        UINavigationBar.appearance().tintColor = UIColor.whiteColor()
        UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName : UIColor.whiteColor()];

        return true
    }