How to change keyboard height in swift 3?

Question

iOS

How to change keyboard height in swift 3? The task is to make it so that when you press a button on the keyboard, the view is resized to full screen.
I do it through NSLayoutConstraint

var screenWidth = UIScreen.main.bounds.size.width;
var screenHeight = UIScreen.main.bounds.size.height;

var heightConstraint: NSLayoutConstraint?

func setUpHeightConstraint()
    {
        if (heightConstraint == nil)
        {
            heightConstraint = NSLayoutConstraint(item: view, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: screenHeight);
            heightConstraint?.priority = UILayoutPriority(UILayoutPriorityRequired);
            
            view.addConstraint(heightConstraint!);
        }
        else
        {
            heightConstraint?.constant = screenHeight;
        }
        heightConstraint?.constant = screenHeight;
        print(">>: \(view.frame.size)");
    }

the function is called from updateViewConstraints()
As a result, the print prints the old sizes, and the view itself does not change
. The problem is that I already implemented this a month ago, but I was careless to remove that code, and the backups were not saved.

Answer 1

Probably forgot to insert before adding the constraints:

view.translatesAutoresizingMaskIntoConstraints = false

Answer 2

Yes, I inserted it, it didn’t really help, or rather, the application behaved strangely, in one assembly, the height changed, then reselected (added print () with text), compiled and again does not change