View popup from a button when pressed and cover the whole window size

i am doing coding in iPhone and i want to know how a new view popup 开发者_开发问答from a button when we click it and the popup view continuosly zooming to cover the whole iphone screen.(it is not any image , it is a view having view controllers too)

Your primary view controller should "present" the modal one using presentModalViewController:animated:. (Docs link)