Instance Method

value(forAnimatedKey:)

Returns the most recently set value for the specified key.

Declaration

func value(forAnimatedKey key: NSCollectionViewTransitionLayout.AnimatedKey) -> CGFloat

Parameters

key

A key whose value you set previously using the updateValue(_:forAnimatedKey:) method.

Return Value

The last value set for the key.

Discussion

Use this method to retrieve floating-point values that relate to laying out the contents of your collection view. The key you specify is a string that you define and that has some meaning to your layout’s implementation. At points during an interactive transition, you can assign new values to that key using the updateValue(_:forAnimatedKey:) method.

See Also

Updating the Transition Information