以編程方式彈出一個UIViewConroller

Question

我想回到一個UIViewController。我有下面的代碼，但它不工作：

let signUpPage = self.storyboard?.instantiateViewController(withIdentifier: "RegisterViewController_") 
signUpPage?.navigationController?.popViewController(animated: true) 

Answer 1

如果你想彈出一個特定的ViewController：如果你想去以前ViewController

self.navigationController!.popToViewController(signUpPage, animated: true) 

：

self.navigationController?.popViewController(animated: true)