ViewDidDisappear does not get calling in Ipad Apllication?

Question

I have used following code to insert new view in split view based application

DelegateObj.splitViewController.viewControllers = [NSArray arrayWithObjects:
                     FirstObj.navigationController,SecondViewControllerObj, nil];   

Similarly when i want to come back I Popped view from 1st object and inserted ThirdViewController Object similarly as above. but this flow doesnt calls Second views viewDidDisappear method. What is the best way to do that? Please help! Thanks in Advance.