如何通过PageViewController将viewController的数据传递到pageViewController的第二个ViewController

import UIKit

class PageViewController: UIPageViewController, UIPageViewControllerDataSource {
    var dataArr: [String] = ["Data for ViewController 1", "Data for ViewController 2"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.dataSource = self
        
        if let firstViewController = viewControllerAtIndex(0) {
            setViewControllers([firstViewController], direction: .forward, animated: true, completion: nil)
        }
    }
    
    func viewControllerAtIndex(_ index: Int) -> UIViewController? {
        if index >= 0 && index < dataArr.count {
            let viewController = ViewController()
            viewController.data = dataArr[index]
            return viewController
        }
        return nil
    }
    
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        if let viewController = viewController as? ViewController {
            if let currentIndex = dataArr.firstIndex(of: viewController.data) {
                let previousIndex = currentIndex - 1
                if previousIndex >= 0 {
                    return viewControllerAtIndex(previousIndex)
                }
            }
        }
        return nil
    }
    
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        if let viewController = viewController as? ViewController {
            if let currentIndex = dataArr.firstIndex(of: viewController.data) {
                let nextIndex = currentIndex + 1
                if nextIndex < dataArr.count {
                    return viewControllerAtIndex(nextIndex)
                }
            }
        }
        return nil
    }
}

class ViewController: UIViewController {
    var data: String = ""
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 处理接收到的数据
        print("Received data: \(data)")
    }
}