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Video Tutorial: Collection Views Part 5: Subclassing Layout

In this video we look at subclassing the layout in the collection view, so that we can animate the addition of the cells.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/3488-collection-views/lessons/6

Thank you very for you video . But i don’t understand this line of code
attribute.center = CGPoint(x: CGRectGetWidth((collectionView?.frame)!) - 23.5, y: -24.5)
how can i know the Point of the add-button
i am very confused , Hope for helping :pray: