ios - Center UICollectionViewCells -

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i need fix small issue uicollectionview, when on 6s device size layout this:

enter image description here

however, want know best way either center them 2 lines, or should shrink them down bit can put 3 of them? think prefer center 2 columns instead i'm not cramming onto same screen. looked wasn't sure layout formatting.

thank you!

i believe 1 or both of these looking for. play values return , see happens. also, constraint inside each cell have effect can not predict without seeing them.

func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionview, minimuminteritemspacingforsectionatindex section: int) -> cgfloat {     return 0 }  func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionviewlayout, insetforsectionatindex section: int) -> uiedgeinsets {     return uiedgeinsetsmake(0, 0, 0, 0) }

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