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    Let’s consider a more complex touch interaction.

    Take that adjustment list on the right. Say you wanted to be able to pan it to see more, tap an item to adjust it, or press and hold to reorder or delete or something. If this were a more complex application, you might be able to double-tap an item in such a list, too. Aren’t you going to end up reinventing UIGestureRecognizer to deal with the interactions here?