我如何解雇观点？

Question

如果我添加这样的视图：[myView addSubview:viewController.view];如何解除它并获得旧视图。例如，点击按钮

-(IBAction)dismiss{
//some code
}

感谢

Answer 1

[viewController.view removeFromSuperview];

Answer 2

if ([viewController.view superView])

{

      [viewController.view removeFromSuperview];

}