Вот код, который работает и правильно устанавливает ширину и высоту
import UIKit
class MyViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
@IBOutlet weak var myCollectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
myCollectionView.delegate = self
myCollectionView.reloadData()
}
//Other methods here
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.size.width
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) //Put your Cell Identifier istead of Cell
let height = cell.contentView.frame.height
return CGSize(width: width, height: height)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets
{
return .zero
}
}