我想从一个视图控制器导航到另一个。 我如何将下面的Objective-C代码转换成Swift? UIViewController *viewController = [[self storyboard] instantiateViewControllerWithIdentifier:@"Identifier"]; UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:viewController]; [self.navigationController pushViewController:navi animated:YES];