1.UINavigationControllerpopToViewController 对应popViewControllerAnimated:也可以使用:

[self.navigationController popToRootViewControllerAnimated:YES]

 [self.navigationController popToViewController:vc animated:YES];

UIViewControllerA *aVC = [UIViewControllerA alloc] init]l;[self.navigationController popToViewController: aVC  animated:YES];[self.navigationController popViewControllerAnimated:YES]2.

presentModalViewControllerAnimated对应dismissModalViewControllerAnimated