Returns a Boolean indicating whether a bounds change triggers a layout update.
- macOS 10.11+
The new bounds of the collection view.
true if a layout should be invalidated or
false if the layout is still valid.
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
invalidate method. The invalidation context passed to that method is created using the