UICollectionview单元格大小

Question

I want to be able to stretch the cell full window width, but retain the actual cell height. Is there a better way to do this then instantiating a NIB object and getting the height. This collection will eventually consist of about 20+ different types of cell designs.

  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    let collectionViewSize = collectionView.frame.size.width
    //let sizingCell = UINib(nibName: "CustomCell", bundle: nil).instantiate(withOwner: nil, options: nil).first as! CustomCell

    //return CGSize(width: collectionViewSize, height:sizingCell.frame.height)
    return CGSize(width: collectionViewSize, height: 70)
  }

Answer 1

this is titlt

you must implement UICollectionViewDelegateFlowLayout

and then you can edit the cell size

ps: better use

collectionView.bounds.size.width

to get the width of collectionView