协调器呈现相同的UIViewController

Question

我正在使用MVVM-Coordinator模式进行项目。 我必须有2个屏幕，ProductList和Product Detail。在产品详细信息中，我有相似的产品，当选择相似的产品时，我希望在产品详细信息屏幕中显示新数据。

在ProductListCoordinator中显示产品详细信息：

func navigateToProductDetail(productID: Int, api: APIClient) {
    let pDetailCoordinator = PDetailCoordinator(navigationController: navigationController)
    let pDetailViewModel = PDetailViewModel(dependencies: PDetailViewModel.Dependencies(productID: productID,
                                                                                              api: api,
                                                                                              coordinator: pDetailCoordinator))
    let pDetailViewController = UIStoryboard.pDetail.pDetailViewController
    pDetailViewController.viewModel = pDetailViewModel
    vodDetailViewController.modalPresentationStyle = .custom
    vodDetailViewController.modalTransitionStyle = .coverVertical
    self.navigationController.present(vodDetailViewController, animated: true, completion: nil)
}

在ProductDetailCoordinator中显示类似产品：

func navigateToSimilarProductDetail(productID: Int, api: APIClient) {
    let pDetailCoordinator = PDetailCoordinator(navigationController: navigationController)
    let pDetailViewModel = PDetailViewModel(dependencies: PDetailViewModel.Dependencies(productID: productID,
                                                                                              api: api,
                                                                                              coordinator: pDetailCoordinator))
    let pDetailViewController = UIStoryboard.pDetail.pDetailViewController
    pDetailViewController.viewModel = pDetailViewModel
    vodDetailViewController.modalPresentationStyle = .custom
    vodDetailViewController.modalTransitionStyle = .coverVertical
    vodDetailViewController.modalPresentationStyle = .overCurrentContext

    let currentViewcontroller = self.navigationController.visibleViewController

    if currentViewcontroller is VodDetailViewController {
       currentViewcontroller!.present(vodDetailViewController, animated: true, completion: nil)
    }
}

我的问题是，ProductList呈现ProductDetail，ProductDetail呈现ProductDetail，但是第三次​​我想呈现一个新的ProductDetail页面时，我得到了：

  

警告：尝试演示已演示的内容

而且，self.navigationController.popViewController(animated: true)对任何PDetailViewController都不起作用。