How to organize resizing and positioning of interface elements in iOS if the parameters are known in the methods viewWillLayoutSubviews and viewDidLayoutSubviews, but modifying the frame in these methods is prohibited?

In iOS, if you cannot modify the frame in the viewWillLayoutSubviews and viewDidLayoutSubviews methods, the correct approach is to use Auto Layout and modify constraints. In these methods, you can update constraints and then call layoutIfNeeded to apply the changes.

Example:

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    // Update constraints, for example, change constant
    myViewWidthConstraint.constant = newWidth
    myViewHeightConstraint.constant = newHeight
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    // You can call layoutIfNeeded if you want to apply changes immediately
    view.layoutIfNeeded()
}

If using frame-based layout, it is better to change the frame in the layoutSubviews method of UIView, rather than in the controller. In the controller, it is preferable to work with constraints to avoid conflicts and lifecycle issues.

Thus, the key is not to change the frame directly in these methods, but to manage constraints or make changes in layoutSubviews.