title: Navigation between subview and superview
body: <p>In my program,I called subview from main superview with the following code:                                                                                        [self.viewaddSubview:mysubView.view];                                                         I want to navigate from subview to previous superview like 'back function'.How can do like that?                                                                                         For My project,I use xCode 3.0.</p>