如何在iPhone/iPad中解除pushViewController？

if let navigationController = self.navigationController {
    navigationController.popViewController(animated: true)
}

if let navigationController = self.navigationController {
    let viewControllerToPopTo = navigationController.viewControllers.first(where: { $0 is YourViewControllerToPopTo })
    navigationController.popToViewController(viewControllerToPopTo, animated: true)
}

if let navigationController = self.navigationController {
    navigationController.popToRootViewController(animated: true)
}