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I mean that looks like an overkill. It already has cellForRowForIndexPath
Once UITableViewSourceDelegate got the cell, it can easily got the height by computing the height of that cell.
So why?
heightForRowAtIndexPathis called for every row in the table in order to compute its total height and consequently set the correct size of the scroll indicator.On the other hand
cellForRowForIndexPathis called only for the visible cells.