Container UIViewController Not Releasing it's Child View Controllers

Question

I have a custom container UIViewController that has six child UIViewControllers, and a set of tabs that the user interacts with to switch between the child view controllers. The

Answer 1

This is not the way to add and remove child view controllers

    [childViewController willMoveToParentViewController:nil];
    [childViewController view] removeFromSuperview];
    [childViewController removeFromParentViewController];

is the way to remove and to add it is

    [parentViewController addChildViewController:childViewController];
    [parentViewController.view addSubview:childViewController.view];
    [childViewController didMoveToParentViewController:parentViewController];