如何更新UIViewController上的Collectionview自定义单元格属性

class CustomCollectionViewCell: UICollectionViewCell {
    var titleLabel: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        
        // 设置titleLabel的样式和位置
        titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: frame.width, height: frame.height))
        titleLabel.textAlignment = .center
        titleLabel.textColor = .black
        titleLabel.font = UIFont.systemFont(ofSize: 16)
        contentView.addSubview(titleLabel)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CustomCell", for: indexPath) as! CustomCollectionViewCell
    
    // 设置单元格的属性
    cell.titleLabel.text = "Custom Cell \(indexPath.item)"
    
    return cell
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 注册CustomCollectionViewCell类作为UICollectionView的单元格类型
    collectionView.register(CustomCollectionViewCell.self, forCellWithReuseIdentifier: "CustomCell")
}