如何设置自动布局约束，以使UIImageView的高度等于超级视图的高度？

Question

I have created a UIView that consists of 3 UILabel s and 1 UIImageView as below -

The UILabel s have lines set to 0 so that the height of the UILabel s change dynamically

I have added constraints such that the height of the image depends on the height of the UILabel s as shown below -

I have set width of the UIImageView to a constant of 100.

I would like to set a constraint on UIImageView such that the height of the UIImageView is equal to the height of the whole view.

I tried adding a "Equal Heights" constraint on the UIImageView and the whole view. I observed that the height of the whole view depends on the height of the UIImageView and not that the height of the UIImageView depends on the whole view as I want it to be.

Can anyone point out how I can add a constraint to the UIImageView such that its height is equal to its superview but the height of the superview is not dependent on the UIImageView ?

Edit - The below image shows the problem that I am facing. When an image is set to the UIImageView , the height of the view changes. I want the height of the UIImageView to be equal to the height of the view, but I do not want the height of the view to be dependent on height of the UIImageView

Answer 1

I believe you haven't add the height constraint to the superview. Setup height constraint for the superview and then add a "Equal Heights" constraint on the UIImageView and the whole view.

Answer 2

Looks like you need to reduce the vertical content compression resistance on the image view.

Set it to something very low like 100 and try again.

Answer 3

In fact default compression resistance of your UIImageView is 750, while content hugging of root UIView is 250. This means AutoLayout engine layouts everything correctly. You can change vertical compression resistance to value lower then 250 ( UILayoutPriority.defaultLow - 1 ) to achieve desired layout.