Swift - UINavigationController p

方式1

直接返回到根视图

self.navigationController?.popToRootViewController(animated: true)

方式2

返回到上一个视图

self.navigationController?.popViewController(animated: true)

方式3

返回指定视图

for vc in (self.navigationController?.viewControllers)!
        {
            if vc is ViewController
            {
                self.navigationController?.popToViewController(vc, animated: true)
            }
        }