collectionView's cell setting

class ViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {

    let cellId: String = "cellId"

    struct cameraInfo {
        var name: String
        var url: String
    }

    var cameraList: [cameraInfo] = []

    override func viewDidLoad() {
        super.viewDidLoad()
        setupCollectionView()

        let canSeeChannel = ["01", "02", "03", "04", "07", "11", "15", "16", "17", "18", "19", "20"]
        for i in 0...11 {
            cameraList.append(cameraInfo(name: "A\(i+1)", url: "http://61.216.177.73/sta/ch18650\(canSeeChannel[i]).m3u8"))
        }
    }

    var num: Int = 1
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell: CameraCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! CameraCollectionViewCell

        cell.camera = nil
        print("\n第\(num)次呼叫")
        num = num + 1
        print("indexPath.item:\(indexPath.item)")
        print(cell.camera)

        cell.camera = Camera(name: cameraList[indexPath.item].name, isConnected: true, isLive: true, url: cameraList[indexPath.item].url)

        print("After setting")
        print(cell.camera.name)

        cell.setupPlayer()



        cell.backgroundColor = .black

        return cell
    }

}