如何使用按钮滚动UICollectionView？

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
    
    @IBOutlet weak var collectionView: UICollectionView!
    @IBOutlet weak var scrollLeftButton: UIButton!
    @IBOutlet weak var scrollRightButton: UIButton!
    
    let cellIdentifier = "Cell"
    let items = ["Item 1", "Item 2", "Item 3", "Item 4", "Item 5"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        collectionView.dataSource = self
        collectionView.delegate = self
        
        // 注册UICollectionViewCell
        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: cellIdentifier)
        
        // 添加按钮点击事件监听器
        scrollLeftButton.addTarget(self, action: #selector(scrollLeftButtonTapped), for: .touchUpInside)
        scrollRightButton.addTarget(self, action: #selector(scrollRightButtonTapped), for: .touchUpInside)
    }
    
    // MARK: - UICollectionViewDataSource
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return items.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdentifier, for: indexPath)
        cell.backgroundColor = UIColor.lightGray
        
        let label = UILabel(frame: cell.contentView.bounds)
        label.textAlignment = .center
        label.text = items[indexPath.item]
        cell.contentView.addSubview(label)
        
        return cell
    }
    
    // MARK: - Button Actions
    
    @objc func scrollLeftButtonTapped() {
        let visibleRect = CGRect(origin: collectionView.contentOffset, size: collectionView.bounds.size)
        let nextVisibleRect = CGRect(x: visibleRect.origin.x - visibleRect.size.width, y: visibleRect.origin.y, width: visibleRect.size.width, height: visibleRect.size.height)
        
        collectionView.scrollRectToVisible(nextVisibleRect, animated: true)
    }
    
    @objc func scrollRightButtonTapped() {
        let visibleRect = CGRect(origin: collectionView.contentOffset, size: collectionView.bounds.size)
        let nextVisibleRect = CGRect(x: visibleRect.origin.x + visibleRect.size.width, y: visibleRect.origin.y, width: visibleRect.size.width, height: visibleRect.size.height)
        
        collectionView.scrollRectToVisible(nextVisibleRect, animated: true)
    }
}