When following MVC design pattern what code should be in the UIViewController class file? - Swift4

I'm trying to understand how to properly implement MVC in swift. Heres my scenario:

I have a signup page with 9 UITextFields, and they're all being made programmatically, and therefore being anchored to the view programmatically. As you can imagine this would be a lot of repetitive code to have in the SignupViewController class file.

Is the convention when following MVC to keep the setup of these text fields in the SignupViewController file, or are you supposed to have a separate file such as SignupView that contains all the text field setup code?