UIImageView大小相对于屏幕大小

Question

I have an UIImageView, with an image like so

imageView.image = UIImage(named: "imageName")
imageView.contentMode = .scaleAspectFit
imageView.translatesAutoresizingMaskIntoConstraints = false

On the iPhone X this image looks great with 140x140 dimensions Maybe needless to say, this does not look great on the iPhone5s, since 140x140 would take up too much of screen space

How can I correctly scale my image for other screen dimensions, what would be the best practice for this?

As for now, I set the image height and width to

let size = UIScreen.main.bounds.height / 5.5
imageView.heightAnchor.constraint(equalToConstant: size),
imageView.widthAnchor.constraint(equalToConstant: size),

Since that will be pretty close to what I am after. But I can't shake the feeling that there are better alternatives than this

Answer 1

The question is a bit broad like "What do you think guys?", but still.

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It's better to change your size accordingly to your parent view, not screen.

imageView.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.2, constant: 0)
imageView.widthAnchor.constraint(equalTo: imageView.heightAnchor, multiplier: 1.0, constant: 0)