Can you explain what happens when the viewWillLayoutSubviews method is called in the UIViewController lifecycle?

The viewWillLayoutSubviews method is called in the UIViewController lifecycle before the system begins laying out the controller's subviews. This means that at this moment, you can modify the frames or properties of the views before they are displayed.

Main points:

• It is called every time before updating the layout of subviews.
• Suitable for making layout changes that depend on current sizes or orientation.
• Can be used for dynamic interface adjustments before display.

Example of usage:

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    // Update button size based on screen size
    myButton.frame = CGRect(x: 20, y: 20, width: view.bounds.width - 40, height: 50)
}