如何快速制作可水平调整大小的单元格的collectionView

Question

I want to create a collection view that has different sized cells. My final outcome is something like this picture

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Answer 1

Your class needs to also implement the UICollectionViewDelegateFlowLayout protocol. Initialize the collection view like so:

let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
collectionView.delegate = self

And then you can implement the function sizeForItemAt :

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let width = // get the width
        let height = // get the height
        return CGSize(width: width, height: height)
    }

As long as your screen can fit multiple of your widths, the collection view will automatically fit them horizontally.