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
YES 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.