Instance Method


Invalidates the current layout and triggers a layout update.


func invalidateLayout()


You can call this method at any time to update the layout information. This method invalidates the layout of the collection view itself and returns right away. Thus, you can call this method multiple times from the same block of code without triggering multiple layout updates. The actual layout update occurs during the next view layout update cycle.

If you override this method, you must call super at some point in your implementation.

See Also

Invalidating the Layout

func invalidateLayout(with: UICollectionViewLayoutInvalidationContext)

Invalidates the current layout using the information in the provided context object.

class var invalidationContextClass: AnyClass

Returns the class to use when creating an invalidation context for the layout.

func shouldInvalidateLayout(forBoundsChange: CGRect) -> Bool

Asks the layout object if the new bounds require a layout update.

func invalidationContext(forBoundsChange: CGRect) -> UICollectionViewLayoutInvalidationContext

Returns a context object that defines the portions of the layout that should change when a bounds change occurs.