Work around for the problem: Frame of container view is not right when its frame is setup via autolayout

gistfile1.txt

-(void)viewDidLayoutSubviews
{
    self.containerView.frame = self.view.bounds;
    self.currentVC.view.frame = self.containerView.bounds;
}

-(void)showChildViewController:(UIViewController *)childVC
{
    [self addChildViewController:childVC];
    self.containerView.frame = self.view.bounds;
    self.currentVC.view.frame = self.containerView.bounds;
    [self.containerView addSubview:childVC.view];
    [childVC didMoveToParentViewController:self];
    self.currentVC = childVC;
}