iOS UICollectionView Detect if there are cells that aren't visible -

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i have uicollectionview, horizontally scrolling , set being 1 row only. how able detect if there cells aren't visible on screen; outside bounds of collectionview's frame?

my idea show arrow next uicollectionview if there cells aren't visible.

you can check instance method of uicollectionview: 

nsarray *indexpaths = [self.collectionview indexpathsforvisibleitems];

you compare first 1 first item in data source, , last 1 last item.


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