如何在滚动时在静态单元格表视图中创建拉伸图像

import UIKit

class CustomTableViewCell: UITableViewCell {
    var stretchImageView: UIImageView!

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        stretchImageView = UIImageView()
        contentView.addSubview(stretchImageView)
        
        // 设置拉伸图像的约束
        stretchImageView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            stretchImageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
            stretchImageView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
            stretchImageView.topAnchor.constraint(equalTo: contentView.topAnchor),
            stretchImageView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor)
        ])
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    let tableView = UITableView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        tableView.dataSource = self
        tableView.delegate = self
        tableView.register(CustomTableViewCell.self, forCellReuseIdentifier: "CustomCell")
        
        // 设置表视图的约束
        tableView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(tableView)
        NSLayoutConstraint.activate([
            tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            tableView.topAnchor.constraint(equalTo: view.topAnchor),
            tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
    }
    
    // MARK: - UITableViewDataSource
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 10
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomTableViewCell
        
        // 在这里设置拉伸图像
        let imageName = "image\(indexPath.row)"
        let image = UIImage(named: imageName)
        cell.stretchImageView.image = stretchImage(image)
        
        return cell
    }
    
    // MARK: - UITableViewDelegate
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 200
    }
    
    // MARK: - Helper Methods
    
    func stretchImage(_ image: UIImage?) -> UIImage? {
        guard let image = image else { return nil }
        
        let size = CGSize(width: tableView.bounds.width, height: 200)
        UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
        
        image.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        let stretchedImage = UIGraphicsGetImageFromCurrentImageContext()
        
        UIGraphicsEndImageContext()
        
        return stretchedImage
    }
}