UIPageViewControllerDelegate：'NSInternalInconsistencyException'，原因：'无效参数不满足：[views count] == 3'

Question

应用程序崩溃并显示错误消息：

  

由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序，原因：'无效的参数不满足：[views count] == 3'

 private func rotateFirstPage() {
        guard let pageViewController = pageViewController else {
            return
        }
        if let firstPage = pageDataSource.pages.first {
            pageViewController.setViewControllers([firstPage], direction: .forward, animated: true, completion: nil)
        }
    }
func pageViewController(_ pageViewController: UIPageViewController,
                        didFinishAnimating finished: Bool,
                        previousViewControllers: [UIViewController],
                        transitionCompleted completed: Bool) {

    if firstAutoRotation {
        Timer?.invalidate()
        rotateFirstPage()
    }
    pageControl.currentPage = pageDataSource.presentationIndex(for: pageViewController)
}