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I am currently implementing infinite scrolling using collectionView by following this link. But I got stuck when I have to add collectionView sectionheader. The header doesn't shows up when I am implemeting the above link custom flow layout, but if I use default UICollectionViewLayout it's been displayed.

Implemented the method : -

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize
rmaddy
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Aditya Srivastava
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2 Answers2

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func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize

This function is important for giving the size for collection view section header , and if you using the UICollectionViewLayout functions and pass the attribute layout then "referenceSizeForHeaderInSection" method is not need to implement 

layoutAttributesForElements(in rect:)
Aman Gupta
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  • which method you are using "referenceSizeForHeaderInSection" or "layoutAttributesForElements". – Aman Gupta Dec 04 '17 at 10:41
  • Can you show me how to you registered the section. and i aman19ish@gmail.com – Aman Gupta Dec 04 '17 at 11:14
  • This answer actually helped me get unstuck from an issue I was having where I was already recalculating the header frame in my flowlayout subclass. Unfortunately I can't upvote it because I think it needs to be improved and expanded on for clarity in order to answer the original question. I'm not sure most people want to be touching something like `layoutAttributesForElements(in rect:)` – bitwit May 08 '18 at 21:09
  • Thank you for your suggestion bitwit – Aman Gupta May 09 '18 at 07:17
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It works for me please try it hope helps to you

Set the UICollectionViewDelegateFlowLayout delegate 

YourViewController : UIViewController <UICollectionViewDelegateFlowLayout>

if You want scrolling then you can use this method in didLoad method

self.yourcollectionview.scrollDirection = UICollectionViewScrollDirectionHorizontal

self.yourcollectionview.scrollDirection = UICollectionViewScrollDirectionVertical
Sanjukta
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