如何解除视图？

Question

如果我添加这样的视图：[myView addSubview:viewController.view];我该如何解雇它并获得旧视图。例如按钮点击

-(IBAction)dismiss{ 
//some code 
} 

感谢

Answer 1

[viewController.view removeFromSuperview]; 

Answer 2

if ([viewController.view superView]) 

{ 

     [viewController.view removeFromSuperview]; 

}