Blog post: SwiftUI with UICollectionView - 5. Add SwiftUI UIHostingController as a child of our UIViewController

swiftui-uicollectionview-2.swift

//...

extension CollectionViewExample: UICollectionViewDataSource {
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 9
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MyCollectionViewCell.reuseIdentifier, for: indexPath) as? MyCollectionViewCell else {
            fatalError("Could not dequeue cell")
        }
        
        // Add SwiftUI UIHostingController as a child of our UIViewController
        cell.embed(in: self)
        return cell
    }
}