Swift 3 - Background image issue for my UIViewController in landscape mode - ios

Question

First, this was done programmatically and not in Storyboards.
I am using a background image for my UIViewController. It looks fine in portrait mode but because my image is not wide enough for landscape mode, the image becomes doubled (the same image is shown twice, side by side) when the device is tilted to landscape mode. Is there a way to switch to a different background image if the device is rotated to landscape mode in order to avoid this issue?
Please note: I am trying to do this without having to create an entirely new UIViewController for landscape mode.
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor(patternImage: UIImage(named: "backgroundimage.png")!)
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true
self.navigationController?.view.backgroundColor = UIColor.clear
view.addSubview(inputsContainerView)
view.addSubview(loginRegisterButton)
view.addSubview(profileImageView)
view.addSubview(loginRegisterSegmentedControl)
setupInputsContainerView()
setupLoginRegisterButton()
setupProfileImageView()
setupLoginRegisterSegmentedControl()
}

Answer 1

Use UIImageView to set a background image instead of using UIColor(patternImage:) method. See the below code snippet
var backgroundImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
backgroundImageView = UIImageView(frame: CGRect(x: self.view.frame.origin.x, y: self.view.frame.origin.y, width: self.view.frame.width, height: self.view.frame.height))
backgroundImageView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(backgroundImageView)
}
I have created a backgroundImageView and set the image to that view. In order to handle portrait and landscape mode, autoresizingMask parameter is also set