How can I dismiss view?

问题:

If I add view like this: [myView addSubview:viewController.view]; how can I dismiss it and get the old view. For example on button click

-(IBAction)dismiss{
//some code
}

thanks

回答1:

[viewController.view removeFromSuperview];

回答2:

if ([viewController.view superView])

{

      [viewController.view removeFromSuperview];

}