Best way to modify UIView Outside UIViewController

I try to create a class MyViewControllerDesign.swift, that handle all design setting, like configuration, modification... and that can be called from everywhere.

What is the best way to modify an UIView, that was created in a MyUIViewController, from an function of MyViewControllerDesign ?

1 - Should I pass context of MyUIViewController to hideMyView function ?

func hideMyView(context: MyUIViewController){
   context.myView.hidden = true
}

2 - Or should I pass the view to hideMyView function ?

func hideMyView(myView: UIView){
   myView.hidden = true
}

... but I have to pass it from startTasks too...

func startTasks(myView: UIView){
   ...
   myViewControllerDesign.hideMyView(myView)
   ...
}

3 - Or should I let hideMyView function on MyUIViewController ?

What is the best way ? Is there a design pattern to handle that case ?