Aspect Fill on navigation bar image?

Question

I'm wanting to achieve the same look as an imageView's aspect fill for my navigation controller's background image.

Currently I'm using this to setup the image:

UINavigationBar.appearance().setBackgroundImage(imageToCache?.resizableImage(withCapInsets: UIEdgeInsetsMake(0, 0, 0, 0), resizingMode: UIImageResizingMode.stretch), for: .default)

UIImageResizingMode.stretch obviously gives me a nasty stretched look. I don't care if the image is getting cut off on the top/bottom, I'm just needing it to be put into the nav bar full sized and what shows shows.

I can't just pass in nil to the resizing mode.

There's also the

init(rawValue:)) 

option for the resizing mode, but any number I put in there results in there being no image in the background anymore.

Any ideas?

edit:

let picture = passedPerson.pictureURL!


         if let imageFromCache = MainPageVC.imageCache.object(forKey: picture as String as NSString) {


                var titleView = UIImageView()
                titleView.contentMode = .scaleAspectFit
              titleView.image = imageFromCache

        self.navigationItem.titleView = titleView  } else {
        print(picture)
        var requested = URLRequest(url: URL(string: picture)!)

        URLSession.shared.dataTask(with: requested) {data, response, err in


            if err != nil {

                print(err?.localizedDescription)
            } else {


                DispatchQueue.main.async {

                    let imageToCache = UIImage(data: data!)

                    MainPageVC.imageCache.setObject(imageToCache!, forKey: picture as String as NSString)

                    var titleView = UIImageView()
                    titleView.contentMode = .scaleAspectFit
                    titleView.image = imageToCache

                    self.navigationItem.titleView = titleView


                  //  UINavigationBar.appearance().setBackgroundImage(imageToCache?.resizableImage(withCapInsets: UIEdgeInsetsMake(0, 0, 0, 0), resizingMode: UIImageResizingMode.stretch), for: .default)
                }

            }

            }.resume()

The above results in no picture showing up.

Answer 1

try with this . hope it you will work

UINavigationBar.appearance().setBackgroundImage(imageToCache‌​, forBarMetrics: .Default)