如何将scrollView放入另一个滚动视图中

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建父级滚动视图
        let parentScrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height))
        parentScrollView.backgroundColor = .white
        
        // 创建子级滚动视图
        let childScrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 500))
        childScrollView.backgroundColor = .gray
        
        // 将子级滚动视图添加到父级滚动视图中
        parentScrollView.addSubview(childScrollView)
        
        // 设置父级滚动视图的contentSize以适应子级滚动视图的内容大小
        parentScrollView.contentSize = childScrollView.frame.size
        
        // 设置父级滚动视图和子级滚动视图的滚动方向一致
        parentScrollView.isDirectionalLockEnabled = true
        childScrollView.isDirectionalLockEnabled = true
        
        // 在子级滚动视图中添加内容
        let imageView = UIImageView(image: UIImage(named: "image.jpg"))
        imageView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 500)
        childScrollView.addSubview(imageView)
        
        // 将父级滚动视图添加到视图控制器的视图中
        view.addSubview(parentScrollView)
    }
}