A Boolean value indicating whether the view is being rendered as part of a live resizing operation.
- macOS 10.1+
AppKit sets the value of this property to
true when a live resizing operation involving the view is underway. Use this property to determine when to optimize your view’s drawing behavior. Typically, you access this property from your
draw(_:) method and use the value to change the fidelity of the content you draw, or to draw your content more efficiently.