A Boolean value indicating whether the flow layout object should invalidate its current attributes.
- macOS 10.11+
Setting this property to
false tells the flow layout object to keep its existing layout information, effectively stopping the invalidation process. Typically, you set this property to
false only if you subclass
NSCollection and update changed layout information directly.
The default value of this property is
true, which causes the flow layout object to throw out its existing layout information and recompute it.