//psuh
self.navigationController?.pushViewController(TwoVc, animated: true);
//pop
self.navigationController?.popViewController(animated: true);
//静态跳转
// self.present(<#T##viewControllerToPresent: UIViewController##UIViewController#>, animated: <#T##Bool#>, completion: <#T##(() -> Void)?##(() -> Void)?##() -> Void#>)
//dismiss
//静态返回
//self.dismiss(animated: <#T##Bool#>, completion: <#T##(() -> Void)?##(() -> Void)?##() -> Void#>)