Setting UIImageView Width, Height, Aspect Ratio & Constraints X, Y - swift

Question

I've set a UIImageView in my view controller and assigned constraints x & Y which works I'm trying to set the image width, height & aspect ratio but it doesn't seem to be working.
I've tried many answers already on here but can seem to get it working.
import UIKit
class GuestLoginViewController: UIViewController {
let headerImage = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
setHeaderImage()
}
func setHeaderImage() {
view.addSubview(headerImage)
headerImage.frame = CGRect(x: 0, y: 0, width: super.view.frame.width, height: 95)
headerImage.translatesAutoresizingMaskIntoConstraints = false
headerImage.mask?.contentMode = UIView.ContentMode.redraw
headerImage.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
headerImage.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
headerImage.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
headerImage.image = UIImage(named: "header")
view.sendSubviewToBack(headerImage)
}
}

Answer 1

As soon as you set headerImage.translatesAutoresizingMaskIntoConstraints = false, the frame is ignored. You need to set some constraint to establish the height of your UIImageView. Unfortunately, the image contents does not affect the height of the UIImageView.
Set either:
an absolute height constraint
an offset from the bottom of the superView
height relative to the width with a multiplier (an "aspect ratio constraint")
Based on my comment, you turned off headerImage.translatesAutoresizingMaskIntoConstraints = false and it worked.
This gives you extra constraints (your 3 plus the 4 that are generated from the frame), but luckily they aren't conflicting.
Instead, I would suggest you leave the translatesAutoresizingMaskIntoConstraints set to false and set a constraint for the height:
headerImage.heightAnchor.constraint(equalToConstant: 95).isActive = true