Informs the view’s subviews that the view’s bounds rectangle size has changed.
- macOS 10.0+
The previous size of the view's bounds rectangle.
If the view is configured to autoresize its subviews, this method is automatically invoked by any method that changes the view’s frame size.
The default implementation sends
resize to the view’s subviews with
old as the argument. You shouldn’t invoke this method directly, but you can override it to define a specific resizing behavior.