How to change height of UIView that already has height anchor?

Question

If I have this for a child view controller:

autoCompleteViewController.view.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.act         


        

Answer 1

First you have disable the previous constraint and activate another

For example

let heightAnchor_one = autoCompleteViewController.view.heightAnchor.constraint(equalToConstant: x)

let heightAnchor_two = autoCompleteViewController.view.heightAnchor.constraint(equalToConstant: y)

heightAnchor_one.isActive = true

heightAnchor_two.isActive = false

then whichever constraint you need activate that and disable the other.