shouldInvalidateLayout(forBoundsChange:)
Returns a Boolean indicating whether a bounds change triggers a layout update.
Declaration
func shouldInvalidateLayout(forBoundsChange newBounds: NSRect) -> BoolParameters
- newBounds:
The new bounds of the collection view.
Return Value
true if a layout should be invalidated or false if the layout is still valid.
Discussion
The default implementation of this method returns false. You can override this method in your custom layout classes and return a different value as needed. Your implementation of the method should determine if the new bounds would cause changes to the layout of other portions of the collection view.
If you return true from this method, the collection view invalidates the layout using the invalidateLayout(with:) method. The invalidation context passed to that method is created using the invalidationContext(forBoundsChange:) method.