当用户杀死应用程序时，如何解除所有呈现的视图控制器？

func applicationWillTerminate(_ application: UIApplication) {
    if let rootViewController = window?.rootViewController {
        dismissAllPresentedViewControllers(rootViewController)
    }
}

func dismissAllPresentedViewControllers(_ viewController: UIViewController) {
    if let presentedViewController = viewController.presentedViewController {
        presentedViewController.dismiss(animated: false, completion: nil)
    }
    
    if let navigationController = viewController as? UINavigationController {
        navigationController.popToRootViewController(animated: false)
    }
    
    if let tabBarController = viewController as? UITabBarController {
        for childViewController in tabBarController.viewControllers ?? [] {
            dismissAllPresentedViewControllers(childViewController)
        }
    }
    
    for childViewController in viewController.children {
        dismissAllPresentedViewControllers(childViewController)
    }
}