我通过修改StretchyTableHeaderView的一些代码找到了答案。在添加下面的代码之前，我将尝试简单地解释我所做的事情。因此，首先我只是简单地创建了CollectionViewReusableView，就像为CollectionViews创建的任何SupplementaryView一样。实际上，我只是为stretchy TableViewHeader找到了这段代码。我只是将它转换为UICollectionReusableView。但是，此标题视图包含scrollViewDidScroll函数，该函数操作containerView和imageView的底部约束，还操作imageView的高度，使其随滚动视图。
然后你只需将它注册到你的collectionView中，将它作为supplementaryView传递给First Section，并在创建布局时给予它一个高度。最后在scrollViewDidScroll的委托方法中，寻找你的补充视图，如果找到了，就在你的头中调用scrollViewDidScroll函数。
这是StretchHeaderCollectionResultableView类别：

final class StretchyCollectionHeaderView: UICollectionReusableView {
    static let reuseIdentifier = "stretchy-homePage-header-view-reuse-identifier"
    
    public let imageView: UIImageView = {
        let imageView = UIImageView()
        imageView.clipsToBounds = true
        imageView.contentMode = .scaleAspectFill
        return imageView
    }()
    
    private var imageViewHeight = NSLayoutConstraint()
    private var imageViewBottom = NSLayoutConstraint()
    private var containerView = UIView()
    private var containerViewHeight = NSLayoutConstraint()
    
    // MARK: - Init
    override init(frame: CGRect) {
        super.init(frame: frame)
        createViews()
        setViewConstraints()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
    /// Create Subviews
    private func createViews() {
        addSubview(containerView)
        containerView.addSubview(imageView)
    }
    
    /// Setup View Constraints
    func setViewConstraints() {
        NSLayoutConstraint.activate([
            widthAnchor.constraint(equalTo: containerView.widthAnchor),
            centerXAnchor.constraint(equalTo: containerView.centerXAnchor),
            heightAnchor.constraint(equalTo: containerView.heightAnchor)
        ])
        
        containerView.translatesAutoresizingMaskIntoConstraints = false
        
        containerView.widthAnchor.constraint(equalTo: imageView.widthAnchor).isActive = translatesAutoresizingMaskIntoConstraints
        containerViewHeight = containerView.heightAnchor.constraint(equalTo: self.heightAnchor)
        containerViewHeight.isActive = true
        
        imageView.translatesAutoresizingMaskIntoConstraints = false
        imageViewBottom = imageView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor)
        imageViewBottom.isActive = true
        imageViewHeight = imageView.heightAnchor.constraint(equalTo: containerView.heightAnchor)
        imageViewHeight.isActive = true
    }
    
    /// Notify View of scroll change from container
    public func scrollviewDidScroll(scrollView: UIScrollView) {
        containerViewHeight.constant = scrollView.contentInset.top
        let offsetY = -(scrollView.contentOffset.y + scrollView.contentInset.top)
        containerView.clipsToBounds = offsetY <= 0
        imageViewBottom.constant = offsetY >= 0 ? 0 : -offsetY / 2
        imageViewHeight.constant = max(offsetY + scrollView.contentInset.top, scrollView.contentInset.top)
    }
    
}

public func scrollviewDidScroll(scrollView: UIScrollView)是您需要在主ViewController的scrollViewDidScroll方法中调用的函数。
将以上课程注册到您的收藏夹查看：

collectionView.register(StretchyCollectionHeaderView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: StretchyCollectionHeaderView.reuseIdentifier)

在创建collectionView的布局时将以下内容添加到节标题：

func generateFirstSectionLayout(isWide: Bool) -> NSCollectionLayoutSection {
        let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),
                                              heightDimension: .fractionalHeight(1.0))
        let item = NSCollectionLayoutItem(layoutSize: itemSize)
    
        let groupSize = NSCollectionLayoutSize(
            widthDimension: .fractionalWidth(1.0),
            heightDimension: .absolute(44))
        let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitem: item, count: 1)

        // Set header properties here
        let headerSize = NSCollectionLayoutSize(
            widthDimension: .fractionalWidth(1.0),
            heightDimension: .fractionalWidth(isWide ? 2/4 : 2/3))
        let sectionHeader = NSCollectionLayoutBoundarySupplementaryItem(
            layoutSize: headerSize,
            elementKind: HomePageViewController.sectionHeaderElementKind,
            alignment: .top)

        let section = NSCollectionLayoutSection(group: group)
        section.boundarySupplementaryItems = [sectionHeader]

        return section
    }

将数据添加到标题：

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
      if indexPath.section == 0 {
            guard let supplementaryView = collectionView.dequeueReusableSupplementaryView(
                ofKind: kind,
                withReuseIdentifier: StretchyCollectionHeaderView.reuseIdentifier,
                for: indexPath) as? StretchyCollectionHeaderView else { fatalError("Cannot create header view") }

            supplementaryView.imageView.image = UIImage(named: "HeaderHomePage")
            return supplementaryView
        }
        else {
            guard let supplementaryView = collectionView.dequeueReusableSupplementaryView(
                ofKind: kind,
                withReuseIdentifier: HomePageAutoxHeaderView.reuseIdentifier,
                for: indexPath) as? HeaderView else { fatalError("Cannot create header view") }

            return supplementaryView
        }
    }

添加到第一部分，最后在ViewController中调用：

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if let header = homePageCollectionView.supplementaryView(forElementKind: HomePageViewController.sectionHeaderElementKind, at: IndexPath(item: 0, section: 0)) as? StretchyCollectionHeaderView {
                header.scrollviewDidScroll(scrollView: homePageCollectionView)
     }
}

如果你的标题在你开始滚动后才拉伸，也在viewDidAppear()中调用上述函数。