Setting content mode in UIImageView no longer works in iOS 11

I have this code in order to put an UIImageView in the center of a navigation controller bar and properly scale the image:

override func viewDidAppear(_ animated: Bool) {

    let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 150, height: 28));
    imageView.contentMode = .scaleAspectFit;

    let image = UIImage(named: "image_title.png");
    imageView.image = image;

    self.navigationItem.titleView = imageView;
}

The code works fine in iOS 10, however in iOS 11 the ".scaleAspectFit" property is not considered and the images is not scaled in the UIImageView size.

I tried with some solutions i found:

• Setting the frame of the UIImageView after setting the "contentMode" property
• Setting imageView.setNeedsLayout()
• Setting imageView.setNeedsDisplay()

unfortunately, no one of these solutions works. The "contentMode" property is simply ignored,

Any idea on what the problem could be?

Thank you in advance

Works for me such way (using additional UIView)

        let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 120, height: 40))
        let image = UIImageView(image: UIImage(named: "img-logo"))
        image.contentMode = .scaleAspectFit
        image.frame = titleView.bounds
        titleView.addSubview(image)
        viewController.navigationItem.titleView = titleView